Is this turbo loud is it able to take an aftermarket BOV? im assuming its the same turbo as on the hhr ss if anyone has videos or input thank you

Hmm no one has a TC yet haha so no vids... there's a few posted from testing and what not, it's not that loud.

Hmm no one has a TC yet haha so no vids... there's a few posted from testing and what not, it's not that loud.

anyone know if the BOV is able to be swapped this car can boost pretty high and ive seen a couple of the vids and its not that loud with the srt-4 its a loud blow off im assuming an aftermarket BOV would make this sound much more auidable

It's something to do with the bypass air is fed back into the intake or something as to not waste the air, I don't know exactly how it works, but it won't be as loud as the typical blowoff you currently hear on the street.

why does everyone talk about blow off valves all the time? they really aren't that cool, i had an atmospheric greddy type r on my mr2 turbo and the noise gets really annoying and the novelty wears off after about a week.
i believe the LNF doesn't have a BOV, it has a recirculating bypass valve? i stand to be corrected but i'm pretty sure.

with the no lift shift it be pointless anyways you dont wanna lose the pressure

Sorry i did not see the other threads im just trying to find out cause i know this turbo system is different deal as other cars so im trying to see what my options are

I'ts a bypass valve, bov is pointless since you want to maintain your boost not release it, why would you want one? Personally, I hate the constant spooling, esp when your in traffic where its sorta moving then not, you hear it spool constantly and I wanted to shoot myself in my friends car every time he went from 0-30 to keep up with traffic.

I'ts a bypass valve, bov is pointless since you want to maintain your boost not release it, why would you want one? Personally, I hate the constant spooling, esp when your in traffic where its sorta moving then not, you hear it spool constantly and I wanted to shoot myself in my friends car every time he went from 0-30 to keep up with traffic.

Good point im kicking myself for posting this right now sorry guys you can delete this post

a blow off valve is used for bad situations such as HIGH Speeds about 100-200mph.... also for a turbo running ALOT of boost which the stock SS/TC will not be doing.... but hey if you want to tune it to 20psi then by all means get a blow off valve

let it stay quite man... ppl who race u will be like oh its ure basic cobalt... and then wen u f-in burn them they will be like, "omg did you turbo that?" Its a sleeper man... Wake it up by racing

but if you get a BIGGER turbo... or too much pressure from a high tune boost then definately get a BOV

a blow off valve is used for bad situations such as HIGH Speeds about 100-200mph.... also for a turbo running ALOT of boost which the stock SS/TC will not be doing.... but hey if you want to tune it to 20psi then by all means get a blow off valve

let it stay quite man... ppl who race u will be like oh its ure basic cobalt... and then wen u f-in burn them they will be like, "omg did you turbo that?" Its a sleeper man... Wake it up by racing

but if you get a BIGGER turbo... or too much pressure from a high tune boost then definately get a BOV

it may hit close to 20 psi stock.

it may hit close to 20 psi stock.

well with the new set up as in the turbo will boost at a rate to keep your speed constant... then a bov is not needed...if the turbo to hot it will boost high mayybe around 15psi to give u the boost u need if its colder it might boost at 9 psi...so in the long run the set up wit the bypass stock is tuned to run nicely even when ure turbo is boosting at low or high psi.. still not needed

unless constantly ure turbo feels that it has to boost at 15psi or higher then yea get a bov so your turbo doesnt wear out but if it feels the need to boost higher then let it.... its doing it for a reason by letting away pressure with a BOV ure basically saying hey boost stopppppp!!!!!

It makes sense to want something that makes you faster. It's just plain stupid to want something that makes you slower. An atmospheric BOV will do two things: 1) screw up your AFR because you are blowing off metered air and 2) throw all your boost pressure out the window instead of helping keep the turbo spooled.
But hey, being cool trumps being fast right? Just look at all the fart can sticker racers.

its a return style system anyways, which really proves no aid towards creating boost, but is realitivly better then blowing it off. again...upgrading the turbo would resault in a BOV. but as they sit stock, the return style system is better then putting a BOV on.

upgrading the turbo will not result in a BOV.

You need to really boost a huge turbo. And somebody who really does one hell of a tune.
You know how hard its going to be to trick the ecu to think boost pressure is still re circulating and not blowing off.
VERY!

This car will no longer be available by the time somebody comes out with that much tuning solution

i'm sure hahn will come out with a kit that will decimate all

Can anyone tell me what a BOV does??? Because it doesn't seem like anyone even knows... Maybe you guys should just stick to your superchargers. And there will probably never be a stock car that comes with a "Blow off valve"... Maybe a "bypass valve"...

P.S. Someone said that a "BOV" was only used for bad situations such as HIGH Speeds about 100-200mph... Hate to tell you but that is a big load of BS!!! The "BOV" or "bypass valve" is used to release pressure in the piping after the throttle blade is closed and vaccum is present. Thats when it opens. It keeps the turbo from back spooling (something a supercharger will never encounter). And it also keeps the turbo spooled between shifts better because it will allow it to somewhat free spin keeping the rpms up. So yes... even though it will have the "no lift shift" there will still most likely be a bypass valve for turbo longievity....

Can anyone tell me what a BOV does??? Because it doesn't seem like anyone even knows... Maybe you guys should just stick to your superchargers. And there will probably never be a stock car that comes with a "Blow off valve"... Maybe a "bypass valve"...

P.S. Someone said that a "BOV" was only used for bad situations such as HIGH Speeds about 100-200mph... Hate to tell you but that is a big load of BS!!! The "BOV" or "bypass valve" is used to release pressure in the piping after the throttle blade is closed and vaccum is present. Thats when it opens. It keeps the turbo from back spooling (something a supercharger will never encounter). And it also keeps the turbo spooled between shifts better because it will allow it to somewhat free spin keeping the rpms up. So yes... even though it will have the "no lift shift" there will still most likely be a bypass valve for turbo longievity....

wow...you know what a BOV does. congrats. we have known for a long time that the SS/TC's have bypass valves, as do our supercharged engines. so calm down turbo fanboy. the bypass valves throw the air back into the intake tube. it is audible iin the SS/TC and will only get louder with an aftermarket intake.

Stay on topic, don't post unless you are furthering the thread topic. Childish or pointless comments are unnecessary, if you're making a point explain it with facts and information.

wow...you know what a BOV does. congrats. we have known for a long time that the SS/TC's have bypass valves, as do our supercharged engines. so calm down turbo fanboy. the bypass valves throw the air back into the intake tube. it is audible iin the SS/TC and will only get louder with an aftermarket intake.

It's pretty obvious that many other people in the thread don't. I wonder how much boost the BPV will hold. Some guys in srtland have issues with the stock one leaking at higher boost.

Thank you. Seems your the only one who read my post at all. And also, my post was not childish nor off topic. I was just stating that the BOV or BPV was used on all turboed applications... not for high speeds. So thank you xonic for helping me out there. And it seems that people think having the bypass valve go to the intake keeps boost up. Sorry but no. It simply releases pressure, doesn't store it.

It's pretty obvious that many other people in the thread don't. I wonder how much boost the BPV will hold. Some guys in srtland have issues with the stock one leaking at higher boost.

there was one guy with an HHR SS running a tune on his that cranked the turbo to 26psi(i believe) and no boost leaks. afr's were all over the place and injectors were waaayy maxed but no boost leak. lol

Thank you. Seems your the only one who read my post at all. And also, my post was not childish nor off topic. I was just stating that the BOV or BPV was used on all turboed applications... not for high speeds. So thank you xonic for helping me out there. And it seems that people think having the bypass valve go to the intake keeps boost up. Sorry but no. It simply releases pressure, doesn't store it.

very true, and sorry your first post just seemed like you were talking down to people. A blow off valve is possible on the SS/TC's but the car will run very rich between shifts and throw the car out of wack...people dont seem to understand this. until suitable tuning becomes available, they're bypass valves will work just fine.

Thank you. Seems your the only one who read my post at all. And also, my post was not childish nor off topic.

My post was directed to the 16 posts I had to delete, if I thought your post was childish or OT then I would have deleted it :)

Yes you are correct... The bypass valve will work great. And I was talking more about the bypass and bov as a whole. Just didn't seem that everyone knew what they really did. You can get aftermarket bypass valves too to hold more boost and not mess with the metered air. I'm a big ford guy but my girlfriend is crazy about these cars. I stumbled across this thread and just had to help out. I have an 81 mustang with a boosted carburated 4cyl on 17lbs of boost. All custom built by me. Sorry to come on so strong and seem like a total a**.

And thank you for clearing that up REIGN SS.

Yes you are correct... The bypass valve will work great. And I was talking more about the bypass and bov as a whole. Just didn't seem that everyone knew what they really did. You can get aftermarket bypass valves too to hold more boost and not mess with the metered air. I'm a big ford guy but my girlfriend is crazy about these cars. I stumbled across this thread and just had to help out. I have an 81 mustang with a boosted carburated 4cyl on 17lbs of boost. All custom built by me. Sorry to come on so strong and seem like a total a**.

no worries dude...SVO right? i love those cars...i used to be a big mustang guy myself but a rod shooting itself out of the block on my 1998 Mustang GT led me to get a new car. lol. i have been kind of out of the loop on mustangs for awhile now

Same concept as the SVO. Its pretty much the same other then my is carbed rather then fuel injected. Its a blow thru carb setup and is a pain in the ass to tune and work with for that matter. lol. I'd show some pix but no cobalt guys probably care. lol

Sorry, back to the topic guys.

there was one guy with an HHR SS running a tune on his that cranked the turbo to 26psi(i believe) and no boost leaks. afr's were all over the place and injectors were waaayy maxed but no boost leak. lol



very true, and sorry your first post just seemed like you were talking down to people. A blow off valve is possible on the SS/TC's but the car will run very rich between shifts and throw the car out of wack...people dont seem to understand this. until suitable tuning becomes available, they're bypass valves will work just fine.

26psi.. Isn't that a little high for pump? I know the DI systems allow cars to run a leaner tune but I'd think the little K04 was just blowing hot air at that psi.

26psi.. Isn't that a little high for pump? I know the DI systems allow cars to run a leaner tune but I'd think the little K04 was just blowing hot air at that psi.

everything was so off...everything was past efficiency and out of wack, that little k04 is done with at 20psi. he was just happy he dynoed 270+hp with just a tune. it was done so unsafely though. i will see if i can find the thread so you can see the dyno sheets and logs

Here's a a link to the system we've developed for LNF in the Solstice GXP and Sky Redline. We plan to cover Cobalt and HHR next.

Billet Blow-Off Valve System (http://www.turbosystem.com/New_Folder/SolsticeGXPRedline/GXPRedlineBOVUpgrade.htm)

26psi.. Isn't that a little high for pump? I know the DI systems allow cars to run a leaner tune but I'd think the little K04 was just blowing hot air at that psi.

here is the thread
http://www.cobaltss.net/forums/showthread.php?t=111165&highlight=hhr+ss+tune

Wow...all this fighting on what a BOV really does. and alot of it is false information. Let me educate you all for a second.


A Recirculating valve which comes on most stock turbo'd vehicles acts in the same way a BOV does (essentialy). However instead of the air going up and out making a loud woosh noise, it is recirculated back into the intake stream. Why? Because the air is already metered. Recirculating valves are ideal for both performance and drivability.


Blow off valves let the air up and out into the atmosphere. Making a louder woosh noise.

Now, the main reason for either is to prevent compressor surge. Think of it this way, You got air travelling to the right...which spins the compressor say...down.

Now, without a BOV, your basically going to force slow moving air into it, which will in case slow the compressor down.


BOV's/Recirc Valves only purpose is to allow the turbo to continue to spin, vs stopping suddenly all together.

a blow off valve is used for bad situations such as HIGH Speeds about 100-200mph.... also for a turbo running ALOT of boost which the stock SS/TC will not be doing.... but hey if you want to tune it to 20psi then by all means get a blow off valve

let it stay quite man... ppl who race u will be like oh its ure basic cobalt... and then wen u f-in burn them they will be like, "omg did you turbo that?" Its a sleeper man... Wake it up by racing

but if you get a BIGGER turbo... or too much pressure from a high tune boost then definately get a BOV

More then likely they'll be like.... Hey, I knew it was supercharged..! ha

I doubt ppl even know this thing is Turbo'd

Very nicely writen Turbo06Sedan. That was the point I was trying to get across just didn't word it as nicely. I got a racing ticket for the BOV on my mustang and had to write to the court how it always goes off and why.
And word gets around fast. Most people will know it is turboed. Also you will hear it in the exhaust

.
And word gets around fast. Most people will know it is turboed. Also you will hear it in the exhaust

Ive already had several people ask me at lights if its the new turbo'd one, one guy asked me to romp on it so he could hear it! (and as far as I know I am the only one in the raleigh durham area with one) :). And that wonderful whine of the turbo under boost..... much different than a supercharger whine.

why does everyone talk about blow off valves all the time? they really aren't that cool, i had an atmospheric greddy type r on my mr2 turbo and the noise gets really annoying and the novelty wears off after about a week.
i believe the LNF doesn't have a BOV, it has a recirculating bypass valve? i stand to be corrected but i'm pretty sure.

with the no lift shift it be pointless anyways you dont wanna lose the pressure

I'ts a bypass valve, bov is pointless since you want to maintain your boost not release it, why would you want one? Personally, I hate the constant spooling, esp when your in traffic where its sorta moving then not, you hear it spool constantly and I wanted to shoot myself in my friends car every time he went from 0-30 to keep up with traffic.

I agree completely and with your quotes I'm going to make my own statement:

All these people asking about blow-off valves as their first mod need to sell their cars because this car doesn't deserve to be riced out. By using the above quotes as evidence we can easily see that the only purpose a BOV could possibly serve as an initial very first mod -- is to be a ricer fag that makes cool boosted noises to scare other people. Unless you have this thing modded and you can back it up, then stop asking about BOV's. Every post I've seen about them is someone just wanting to know if there is one that "fits". They are never asking which they should get or why for performance reasons. They just wanna know if they can stick one on. We had people asking for them when the SS/SC came out for god's sake -- please stop being so lame. Tune the car, earn the respect, then scare the shit out of everyone because your car sounds mean and can back it up. Your car will sound mean if you do it right. Certain parts that make pretty sounds will become necessary. If all you wanted was "psssssht" -- get a civic, the parts are cheaper and you can make it look as cool as the SS/TC -- and that's all that matters to you anyway.

Ok now. Having a bov isn't ricer. I agree that just putting one on a completely stock car for the sound is stupid. Now I have one on my stang and there hasn't been one person tell me its stupid.

Calling things Gay:

Because anything you don't like inexplicably reminds you of homosexual relations. :confused:

It makes sense to want something that makes you faster. It's just plain stupid to want something that makes you slower. An atmospheric BOV will do two things: 1) screw up your AFR because you are blowing off metered air and 2) throw all your boost pressure out the window instead of helping keep the turbo spooled.
But hey, being cool trumps being fast right? Just look at all the fart can sticker racers.

thats why you move the maf post bov

Wow, that was SIX homo references in a post that ends with 'ass'. I detect some serious latency in this thread! :D :D

excuse me... I guess he said you would be a fag for putting one on. Fag, gay they go together. The point I was trying to get across is that there are things people like and the guy next to them will hate it. Bitching and telling someone he is a ricer fag for having a bov or even a honda for that matter is just plain immature. There are some cool people out there with different preferences then you. So shooting off your mouth calling people a fag for a bov is stupid. There are many cars out there that have bov's and will tear up the streets... so watch who you call a fag because they might just come back and bite your car in the ass.


so out of this post it reads

Fag, fag, gay, fag, fag, fag, ass


lol someone has some deep rooted issues about there sexuality...

whys everyone gotsta be fags!?

Hey Mr. Hahn any idea when these BOV will be ready cause thats a nice setup for the solstice. Also would it even be beneficial to stock vehicles? If it is would it be beneficial for the auto on the HHR SS?

who ever said the injectors were maxed on the lnf are way out of the ball park.

The BOV maintains the spool by releasing boosted air that would push back in the blades and slow the turbo when you let off the throttle. BOV are not stupid, I think they are cool. I could cruise around town as see plenty of people with Atmo BOV running around in SRT4, Scobbie, Evo's ect. Are they all stupid, no.

To answer the orginal posters question, from the turbos I have seen the Recir valve (same function as a BOV) is built into the cold side housing of the turbo so I don't think you could remove it and add a BOV as easily as some boosted cars. Off course since it's so integrated it probably does a great job of keeping the turbo from surging and losing spool.

Also the post about releasing unmetered air is correct, unless the ECU is able to compensate for a BOV it will have trouble understanding why air passing by the MAF isn't make it into the engine, it will probably run bad and give a CEL at some point.

Some turbo cars use a MAP to determine fueling so the fueling is based on the boost pressure post turbo. This means if you release air mass via a BOV the ECU can detect and compensate. The GM cars use a MAF which measure the air before the turbo pulls it in, so when it releases boost the ECU can not handle that. There are lots of advantages to MAF over MAP, mostly in the accuracy area. MAPS rely on a table to reference pressure and RPM to determine how much air is entering the engine. So changing parts of the motor can affect that table and through your calibration out the window where a MAF can detect the addition air and compensate the fuel spark.

EDIT: I just read hahns post, so it looks like you are in luck, also this post is my understanding please clarify or correct me. Don't call me a homo as I am happy married. :lol:

There I edited my posts to keep from arguing. So how does the new cobalt compare to a srt4??? And how does the supercharged???

First mod I would do to the SS/TC is BOV. Personally, I like em. I loved mine in the SRT and I miss it. Gotta love how everyones head rips around to look at you when you blow by them.

Calling things Gay:

Because anything you don't like inexplicably reminds you of homosexual relations. :confused:

LOL< thats funny

who ever said the injectors were maxed on the lnf are way out of the ball park.

I said that the injectors seemed like they had a very high limit, the high pressure pump is what I said I think is limited.

150 L/hr seems like the max for da pump

i like the recirculating bov.... u can hear it spool and if u listen close enough u can hear it blow off jus not into the atmosphere that make ppl look at you and go, "did that car just sneeze?"

i like the recirculating bov.... u can hear it spool and if u listen close enough u can hear it blow off jus not into the atmosphere that make ppl look at you and go, "did that car just sneeze?"

I agree :twothumbs a mother Fu*k!ng 10 :twothumbs

First mod I would do to the SS/TC is BOV. Personally, I like em. I loved mine in the SRT and I miss it. Gotta love how everyones head rips around to look at you when you blow by them.

SRT-4 and SS/TC are two diff cars. What works in one, doesnt work in another.

Fuck it dont listen to me, just throw a bov on. See what happens, so much for your no-lift-shift. Have fun with limp mode and no turbo whatsoever. and one more thing, when you bring your car to the dealer to get your recirc. put back on and everything that you prob fucked up fixed, guess what. OHHHH your warrenty has been voided that will be $2000 please?

And while your at it... Might as well get the turbonator from ebay. You know, the supercharge any car product! That shit will make you flyyyyyyy

srt-4 BOV are sneeze valves sound like crap

You DON'T want a BOV (blow OFF valve) not BPV (bypass valve).

If you release air out of a BOV into the atmosphere/air your releasing air that was metered by the MAF or Mass Airflow Sensor and that air/fuel ratio is what the computer thinks is going into the engine....but WHOOPS you just released the air so hence more fuel goes in and causes rich craptastic running for a bit....

BPV's/what the SS/TC has, releases the air but they bypass it directly into the manifold again so the air stays in the engine and it runs fine.

BOV's are for non MAF systems or high power applications....

So on a standard SS/TC if you want crappy performance just for a sound be my guest...

...sorry if any of thats been said....

i like my pshhh sound i guess imma ricer..........

You DON'T want a BOV (blow OFF valve) not BPV (bypass valve).

If you release air out of a BOV into the atmosphere/air your releasing air that was metered by the MAF or Mass Airflow Sensor and that air/fuel ratio is what the computer thinks is going into the engine....but WHOOPS you just released the air so hence more fuel goes in and causes rich craptastic running for a bit....

BPV's/what the SS/TC has, releases the air but they bypass it directly into the manifold again so the air stays in the engine and it runs fine.

BOV's are for non MAF systems or high power applications....

So on a standard SS/TC if you want crappy performance just for a sound be my guest...

...sorry if any of thats been said....

shit i did my build all wrong, guess i'll start over............. you can use a BOV with a maf setup, like mike25 said, but it's gotta be before the maf sensor so only metered air gets in to the motor.

i like my pshhh sound i guess imma ricer..........



shit i did my build all wrong, guess i'll start over............. you can use a BOV with a maf setup, like mike25 said, but it's gotta be before the maf sensor so only metered air gets in to the motor.


note: the "So on a standard SS/TC"

ie: I was talking about replacing the STOCK BPV with a BOV which is what the OP sounded like they were asking, Post MAF'ers slapping on BOV's would run like crap

I'm not knocking BOV's just people who don't know how to use them, hell none of us like compressor surge, but you might as well do it right and not create any more problems.(talking generally, not stern forum voice)

this is why we all need vent to atmosphere LOLZ.....http://www.youtube.com/watch?v=W_Qul7MiImk

I've got compressor surge on my bypass valve right now lol

Anybody that went to the ny meeting can vouch for that

a blow off valve and bypass valve as basicaly the same thing, except the bypass valve has a rubber hose coming from where the air would get vented to atmosphere on a bov and it is connected just behind the air filter before it enters the turbo. when i had my talon it was done like that because otherwise it would run lean when it would blow off and the motor would struggle. but gm maf doesnt do that so it would peobably work fine just putting a bov on there instead, or just taking off the hose and plugging the hose on the intake with a small air filter or something. but it does cause ur turbo to spool all the way up again. but for myself who loves the sound of a spooling turbo and a blow off valve i dont mind, but if u wanna stay in boost and win that race, keep the bypass, u can hear it in the car somewhat anyway. unless u want to brag to the whole world u have a turbo

i totally replied to the wrong post here

so if you didnt care about power or whatever and you just wanted to hear the blow off sound..how would you put one on the car if theres no mount for it..i jsut baught a 09 ss/tc and i have no clue where the stock bpv is..i would like to put a aftermarket on but i dont see where you'd put it..

^x2 !

To use a external BOV one must relocate the MAF element to a blow thru system. The MAf element must be closer to the throttle plate than the BOV.
THe MAf trasfer must be recalibrated via HPT to get this to work correctly. Our solstice has been this way for 20K miles, never had a CEL over it.

New Era will have these blow thru MAF / BOV pipes availible within a month.

THis is a solstice but here's what the pipes NewEra will have (prototypes likely next week some time) sound like

External BOV LNF (http://www.youtube.com/watch?v=DkKlEA1_DSU)

That camera can't even describe how good that BOV sounds...I'm sure it sounds A LOT better in person...I hate how cameras distort the sound of everything (exhaust, BOV, etc...)

I've got compressor surge on my bypass valve right now lol

Anybody that went to the ny meeting can vouch for that

lawl yea that was kinda funny lol that saab is FAWKZ

hey, yep,
i been doin my research on this, and it's all a recurculatng bypass system. the wastegate, and the "bypass" is all internal, and therefoe goes back into the intake, so putting an aftermarket blowoff valve on this thing would screw you over, unless you move your air flow sensor, and then get it tuned to understand the "missing" air....

hey, yep,
i been doin my research on this, and it's all a recurculatng bypass system. the wastegate, and the "bypass" is all internal, and therefoe goes back into the intake, so putting an aftermarket blowoff valve on this thing would screw you over, unless you move your air flow sensor, and then get it tuned to understand the "missing" air....

Doesn't the SRT-4 work the same way? If so, then Mopar has a "block off plate" that all you do is mount it on the bypass valve, and with the holes in the "block off plate" it releases the compressed air into the atmosphere rather than back into the intake. It doesn't mess with the computer or throw codes or anything.

hey, yep,
i been doin my research on this, and it's all a recurculatng bypass system. the wastegate, and the "bypass" is all internal, and therefoe goes back into the intake, so putting an aftermarket blowoff valve on this thing would screw you over, unless you move your air flow sensor, and then get it tuned to understand the "missing" air....

which is what Baldturbofreak is doing...he will be offering you TC guys charge piping with BOV done the CORRECT way!! :thumb:

Correction, NewEra will have your correctly done BOV system. I just manufacture the goodies.

Doesn't the SRT-4 work the same way? If so, then Mopar has a "block off plate" that all you do is mount it on the bypass valve, and with the holes in the "block off plate" it releases the compressed air into the atmosphere rather than back into the intake. It doesn't mess with the computer or throw codes or anything.

I dont believe the srt4 has a maf sensor, it uses map sensors and built in airflow tables to calculate airflow, so thats why the mopar plate doesnt affect anything.

I dont believe the srt4 has a maf sensor, it uses map sensors and built in airflow tables to calculate airflow, so thats why the mopar plate doesnt affect anything.

Ahh, thanks for the info man.

Good point im kicking myself for posting this right now sorry guys you can delete this post

Quoted for the irony because this is now a sticky LOL

hey, yep,
i been doin my research on this, and it's all a recurculatng bypass system. the wastegate, and the "bypass" is all internal, and therefoe goes back into the intake, so putting an aftermarket blowoff valve on this thing would screw you over, unless you move your air flow sensor, and then get it tuned to understand the "missing" air....

Wastegate is exhaust side so vents back into exhaust system not intake

the wastegate is basically a bypass for the exhaust gases to regulate the turbo. Basically when a certain pre-set boost limit is achieved, the valve opens so the gases bypass the turbo thus regulating boost. When the pressure drops the valve closes and the cycle starts over again (this all happens quickly)

Edit: so not to confuse, it's the actuator that opens and closes the wastegate

for all those that think a bov doesn't work with out moving the maf. YOUR WRONG This maf/map/iat car has 0 and I mean 0 problems with running a bov into the air the car doesn't go way rich/lean, the car doesn't stumble or anything. I will have pics/vids very soon!!!

Information on various parts for people!

http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech101.html

Hope it helps a few

for all those that think a bov doesn't work with out moving the maf. YOUR WRONG This maf/map/iat car has 0 and I mean 0 problems with running a bov into the air the car doesn't go way rich/lean, the car doesn't stumble or anything. I will have pics/vids very soon!!!

x's a zillion

some1 make a how to on a BOV if any1 is up for it

*sigh* i guess ill do it when it comes in

for those of you interested in a BOV for the ss./tc synapse turbo has one for you guys, enjoy!

*sigh* i guess ill do it when it comes in

for those of you interested in a BOV for the ss./tc synapse turbo has one for you guys, enjoy!

jesus christ you're a fucking fan boi

ok i can see alot of ppl are lost in the bov mod..........if going with a bov or bypass valve...you need to get a block off plate thats 1st....2nd find out what you want bov or bypass...im going with a bov hks or tial....Synchronic bov will fu*k with you tune to much since we have the maf in front of the turbo...to run a Synchronic bov youll need to put it 2-3inch in front of the throttle and have the bov on the hot side pipe......dont get me wrong the Synchronic bov work good but with a ball bearing turbo could cause damage.....

someone said why would a bov be adjustable...simple you would want the bov to work if your boosting 5 or 20 psi this is why they a adjustable nut on almost every bov you buy....you need to blow off and let all the air out you dont want back spool...so you adjust the bov you cant have the nut set to 20psi and your only running 5pounds..your not going to blow off.....if you have a tial or hks and you have surge adjust it and you should be fine......

when i ready to move the maf and ready to tune then yea i get me a Synchronic bov.......

ok but my only question is wont this make you run rich?

if you dont route the bov back then yea youll have some back fire but only when you shift.....and if you move the maf then youll be fine

if you dont route the bov back then yea youll have some back fire but only when you shift.....and if you move the maf then youll be fine

where do ppl come up with this stuff..... NO PROBLEMS MEANS NO RICH CONCERNS TO SPEAK OF OR BACK FIRE PROBLEMS!:cussing: if I had any kind of issuse I would def. be letting everyone know!:cssNET:

where do ppl come up with this stuff..... NO PROBLEMS MEANS NO RICH CONCERNS TO SPEAK OF OR BACK FIRE PROBLEMS!:cussing: if I had any kind of issuse I would def. be letting everyone know!:cssNET:

w/e im just giving my 2cent if you want take it.....since the ss/tc has the no lift shift you can run a bov and not have no problems with back firing....when racing......

ok i can see alot of ppl are lost in the bov mod..........if going with a bov or bypass valve...you need to get a block off plate thats 1st....2nd find out what you want bov or bypass...im going with a bov hks or tial....Synchronic bov will fu*k with you tune to much since we have the maf in front of the turbo...to run a Synchronic bov youll need to put it 2-3inch in front of the throttle and have the bov on the hot side pipe......dont get me wrong the Synchronic bov work good but with a ball bearing turbo could cause damage.....

someone said why would a bov be adjustable...simple you would want the bov to work if your boosting 5 or 20 psi this is why they a adjustable nut on almost every bov you buy....you need to blow off and let all the air out you dont want back spool...so you adjust the bov you cant have the nut set to 20psi and your only running 5pounds..your not going to blow off.....if you have a tial or hks and you have surge adjust it and you should be fine......

when i ready to move the maf and ready to tune then yea i get me a Synchronic bov.......


Why do you need a block off plate??
Dave from dejon is running a bov with out all he did was hook the stock one up to a boost only source which makes sense.

And how does the synchronic bov hurt your turbo?

Rerouting the blow off back into the intake will not damage the turbo. that is how most stock one are hooked up you would think that if it would hurt it then they would all just vent to atmosphere to prevent them having to do warranty repairs.

plus rerouting the blow off back to just before the turbo will allow you to keep maximum spool while shifting even with no lift to shift.

AND how will it mess with our tune that makes no sense, if you mount the bovv on the hot pipe and reroute the blow off to just after the maf then it will work exactly like the stock bypass valve.
I am in the proccess right now mof making this exact system. I will have the pipes by the end of the week and the intake the week after. So we will test your theory and mine

It makes sense to want something that makes you faster. It's just plain stupid to want something that makes you slower. An atmospheric BOV will do two things: 1) screw up your AFR because you are blowing off metered air and 2) throw all your boost pressure out the window instead of helping keep the turbo spooled.
But hey, being cool trumps being fast right? Just look at all the fart can sticker racers.
i know this is an old post but even with an aftermarket BOV if you no lift shift it's not gonna blow off... and for regular driving an aftermarket BOV is better so it releases the pressure built up... you guys...:lol:

so is it smart to get an aftermarket bov on a stock 09 ss/tc? or do u go with an intake instead?

so is it smart to get an aftermarket bov on a stock 09 ss/tc? or do u go with an intake instead?
get both. i wouldn't worry about an aftermarket BOV until you get the hardpipes and an intercooler. unless you get the pipes first then the intercooler after. when you WOT shift you won't lose any boost with an aftermarket BOV.

well, you can put an aftermarket blowoff valve on it, i know that hahn racecraft makes a delete plate in order to make this happen. that is step 1. you have to re work the mass air flow sensor as well. not the easiest thing to do, but it's doable.:twothumbs

^ no you don't

well, you can put an aftermarket blowoff valve on it, i know that hahn racecraft makes a delete plate in order to make this happen. that is step 1. you have to re work the mass air flow sensor as well. not the easiest thing to do, but it's doable.:twothumbs

I'll try to have a vid for you guys tmw night of my blow thru MAF w/ TiAL Q BOV

^ no you don't

to do it the PROPER way, you do

I'll try to have a vid for you guys tmw night of my blow thru MAF w/ TiAL Q BOV



to do it the PROPER way, you do

X2.
You either need a blow through setup for the MAF or you need to recirculate back into the intake otherwise you are blowing off air the MAF has already metered and the engine will not see. This does cause a momentary rich condition and bog between shifts. It will not throw a code though from being to rich unless it misfires, but the ECM adjusts the fueling fast enough to prevent a misfire normally.

so wait if i get a tune for my car and set the boost from 15psi to 20psi i should get a BOV then right, if i dont will i cause any damage or will it just help things out a bit.

so wait if i get a tune for my car and set the boost from 15psi to 20psi i should get a BOV then right, if i dont will i cause any damage or will it just help things out a bit.

it will help things. it's good to have.

you can tune your car to 23lb's and not have a BOV and it will work just fine.

hey guys go 2 ths to c my car and hear the blow off. http://www.youtube.com/99turbosi#play/uploads/6/xG7oibPP-jU

It sounds pretty good.

Ok again, Im new to this site, but not a stranger to 4cylinder turbos. But reading some of the replies, I can’t believe some of the responses ive read. So let me clear this up.

1. Yes our cars have a blow off valve. But for some reason on any factory turbo car they are called bypass valves. And for anyone who says you don’t need them, that’s like saying you don’t need to fart after a long night of drinking, and eating white castle. Hi hp turbo drag cars and bikes typically don’t run them because they’re flat foot shifting, and it’s only for short burst. However, in the everyday driving environment, think about how many times you shift, and get on and off the throttle. When you are in boost, no matter how much, once you let off the throttle the pressures got no where to go. Now if you didn’t have a blow off, or bypass valve, all the pressure (boost) will go back the way it came, right back through the turbo. Which is damaging to the turbo. When the pressure runs back through the compressor side that can cause a rapid slow down, or "surge" that basically puts a gun to the turbos shafts head. Meaning the compressor wheel its self or the shaft can snap due to the rapid slow down, or back spinning of a turbo that doesn’t have a bov, or not a sufficient enough bov. But if you let that pressure release, or "fart" your turbo will live to see another 3rd gear highway pull again.

2. The purpose for resuculating the blow off valve is to help keep the turbo spinning durning shifts, not as effective as a no lift shift, but it helps alot in daily driving. Mitsubishi figured that one on back in 89, with the DSM cars. (Eclipse, talon, laser)

3. "I want an aftermarket blow off valve." Well that’s great kid. But a louder blow off, doesn’t give you any power gains. It might get you some "street cred" but besides that, you’re wasting your hard earned, or your parents hard earned cash. Put it like this, if you’re running a stock turbo, you don’t need an aftermarket bov. However if you do plan on turning up the boost, you can get a stiffer bov spring. That allows the bov to not leak at hi boost, or if the stock spring is getting worn. But if you still gotta have the sound, heres one mod you can do that gets you that oh so cool "whoosh" you’ve been having wet dreams about. Get an aftermarket intake. First of all, if you get a tune you actually will GAIN hp, for about the same price as a bov. Next the stock intake is plastic...plastic is an insulator, and it doesn’t resonate, or allow sound to travel to well. But with an aluminum, or stainless steel intake, the sound of the turbo AND the bov are almost amplified. And if that’s all your worried about is hearing your turbo, and bov, BAM!! Instant race car, just add intake! Plus, the smoother bends help the turbo to spool at lower rpms, which is always a good thing.

4. WOT Shifts with after market bov. Ok so you just had to burn the $, and get an aftermarket bov..for your stock turbo. No you will not lose boost, or "blow off" during shifts. As long as your foots firmly planted, your like the dude from the taco bell commercial. "Good to go!" Now to prove this, a simple explanation on how they work. The back side of the bov is connect to MANIFOLD pressure, and is held shut by a spring for when out of boost. And on the other side, The piston side, which is what blocks the boost from being vented. So when ur at 10psi for example, you have 10psi on the back side of the bov, and 10psi on the piston side. The only difference is you have the additional spring pressure on the back side helping to hold it close. When you go from WOT, to closed, the pressure changes in the intake manifold faster the the rest of the intake system. Now you have 0psi on the back of the bov, and 10psi on the front. What do you think happens? WHOOSH!! The 10psi on remaining pushes the valve open, and all positive pressure (boost)is gone. So that being said as long as you are at WOT, you will not lose boost with an aftermarket bov, due to the fact that a bov will "blow off" if there is any variance from the manifold pressure side of the diaphram in the bov, as compared to the other side of the piston.

5. Any tial bov is way, WAY overkill for most turbos all the way up to at least a 60trim. Someone may argue the point "well my car makes 300hp @22 psi, and my buddies 550 hp turbo (insert car here) is at 22psi, why does he need a tial, or twin smaller bov's (twin type-s, HKS-ssq) Well 22psi, is 22psi, no matter how big or small your turbo is, but the big difference is air flow, or volume. Our stock turbo for example might flow 35lbs per min, vs. a gt35r flows around 75 or 80lbs a min. (if I remember correctly) So with a big ass turbo, you not only have to get rid of 22psi, but you also have to get rid of dubble the volume of air in a reasonable amount of time...FAST! You don’t wanna back spin a $1500 Turbo. So you buy a tial then. Boost is not = to volume.

I hope this clears up some future stupid replies. Its 5am, and my spelling and grammar may suck, but ive tried my best to water down an un technical subject, so ANYONE can understand why they’re wasting they’re $, and time...In stock applications.

Ok again, Im new to this site, but not a stranger to 4cylinder turbos. But reading some of the replies, I can’t believe some of the responses ive read. So let me clear this up.

1. Yes our cars have a blow off valve. But for some reason on any factory turbo car they are called bypass valves. And for anyone who says you don’t need them, that’s like saying you don’t need to fart after a long night of drinking, and eating white castle. Hi hp turbo drag cars and bikes typically don’t run them because they’re flat foot shifting, and it’s only for short burst. However, in the everyday driving environment, think about how many times you shift, and get on and off the throttle. When you are in boost, no matter how much, once you let off the throttle the pressures got no where to go. Now if you didn’t have a blow off, or bypass valve, all the pressure (boost) will go back the way it came, right back through the turbo. Which is damaging to the turbo. When the pressure runs back through the compressor side that can cause a rapid slow down, or "surge" that basically puts a gun to the turbos shafts head. Meaning the compressor wheel its self or the shaft can snap due to the rapid slow down, or back spinning of a turbo that doesn’t have a bov, or not a sufficient enough bov. But if you let that pressure release, or "fart" your turbo will live to see another 3rd gear highway pull again.

2. The purpose for resuculating the blow off valve is to help keep the turbo spinning durning shifts, not as effective as a no lift shift, but it helps alot in daily driving. Mitsubishi figured that one on back in 89, with the DSM cars. (Eclipse, talon, laser)

3. "I want an aftermarket blow off valve." Well that’s great kid. But a louder blow off, doesn’t give you any power gains. It might get you some "street cred" but besides that, you’re wasting your hard earned, or your parents hard earned cash. Put it like this, if you’re running a stock turbo, you don’t need an aftermarket bov. However if you do plan on turning up the boost, you can get a stiffer bov spring. That allows the bov to not leak at hi boost, or if the stock spring is getting worn. But if you still gotta have the sound, heres one mod you can do that gets you that oh so cool "whoosh" you’ve been having wet dreams about. Get an aftermarket intake. First of all, if you get a tune you actually will GAIN hp, for about the same price as a bov. Next the stock intake is plastic...plastic is an insulator, and it doesn’t resonate, or allow sound to travel to well. But with an aluminum, or stainless steel intake, the sound of the turbo AND the bov are almost amplified. And if that’s all your worried about is hearing your turbo, and bov, BAM!! Instant race car, just add intake! Plus, the smoother bends help the turbo to spool at lower rpms, which is always a good thing.

4. WOT Shifts with after market bov. Ok so you just had to burn the $, and get an aftermarket bov..for your stock turbo. No you will not lose boost, or "blow off" during shifts. As long as your foots firmly planted, your like the dude from the taco bell commercial. "Good to go!" Now to prove this, a simple explanation on how they work. The back side of the bov is connect to MANIFOLD pressure, and is held shut by a spring for when out of boost. And on the other side, The piston side, which is what blocks the boost from being vented. So when ur at 10psi for example, you have 10psi on the back side of the bov, and 10psi on the piston side. The only difference is you have the additional spring pressure on the back side helping to hold it close. When you go from WOT, to closed, the pressure changes in the intake manifold faster the the rest of the intake system. Now you have 0psi on the back of the bov, and 10psi on the front. What do you think happens? WHOOSH!! The 10psi on remaining pushes the valve open, and all positive pressure (boost)is gone. So that being said as long as you are at WOT, you will not lose boost with an aftermarket bov, due to the fact that a bov will "blow off" if there is any variance from the manifold pressure side of the diaphram in the bov, as compared to the other side of the piston.

5. Any tial bov is way, WAY overkill for most turbos all the way up to at least a 60trim. Someone may argue the point "well my car makes 300hp @22 psi, and my buddies 550 hp turbo (insert car here) is at 22psi, why does he need a tial, or twin smaller bov's (twin type-s, HKS-ssq) Well 22psi, is 22psi, no matter how big or small your turbo is, but the big difference is air flow, or volume. Our stock turbo for example might flow 35lbs per min, vs. a gt35r flows around 75 or 80lbs a min. (if I remember correctly) So with a big ass turbo, you not only have to get rid of 22psi, but you also have to get rid of dubble the volume of air in a reasonable amount of time...FAST! You don’t wanna back spin a $1500 Turbo. So you buy a tial then. Boost is not = to volume.

I hope this clears up some future stupid replies. Its 5am, and my spelling and grammar may suck, but ive tried my best to water down an un technical subject, so ANYONE can understand why they’re wasting they’re $, and time...In stock applications.

Okay the humor me. What BOV would you suggest if a Tial is overkill?

Okay the humor me. What BOV would you suggest if a Tial is overkill?

A tial is overkill for a STOCK turbo. Any HKS, Greddy, Turbo XS is good for stock and lower hp application. I have a tial on my turbo hayabusa (478hp) and a tial on my 240sx (533hp) But if your planning on goin with a big ass turbo later on, well then it makes sence when your upgrading your innercooler pipes to just have a tial flange put on. Makes sence just to do it once. But for the avereage person who is just adding a bov, because they want a louder one, tial is was over kill. Tial are designed for high boost, and high volume turbos. So adding one to your stock turbo set up, its not even gonna be as "loud" (if thats what your worried about) cuz the the stock turbos dont flow enough CFM. Any smaller 30mm BOV is plenty. I mean if your just gonna burn your $ when you dont really need somthin, why dont you change your stock turbo to an external gate, and run a 44mm V-band wastegate? Because that would be overkill too.