can you put on on the supercharger i was told you could ?
and what do you think good idea to put one on or no?
will it void the warn.?

Ibtl?

It's pointless on a SC and with most designs it would not work.

no you can't put one on.

no you can't put one on.

Well... technically you can, but you'll just lose power, which would defeat the whole purpose of the SC. I actually had this discussion with a buddy of mine.

I think BOV noise is so annoying and totally SRTish......

Well... technically you can, but you'll just lose power, which would defeat the whole purpose of the SC. I actually had this discussion with a buddy of mine.

Where would you put it ?

There would never be enough compressor surge to trigger the valve. Technically you could put one *on* the engine but it could never actually function.

I think BOV noise is so annoying and totally SRTish......

LOL the BOV noise isn't SRTish it's high powered turboish :)

LOL the BOV noise isn't SRTish it's high powered turboish :)
haha for real. turbo > SC :cssNET:

haha for real. turbo > SC :cssNET:

for real...sc > turbo > vtec

for real...sc > turbo > vtec
you can't be serious. :lol:

vtak pwns all of you!!! :lol:

and turbo > sc

BOV on a front wheel drive boosted car is SRTish. Wasn't dogin' turbo's - personally I think both have strengths and weaknesses.

BOV on a front wheel drive boosted car is SRTish. Wasn't dogin' turbo's - personally I think both have strengths and weaknesses.

How in the f**k do you think a BOV is SRTish???? That makes no sense at all, SRT 4 just came out a couple of years ago. People have been using blow off valves since the beginning of turbos.

Okay how many stock American made FWD cars come with a BOV? What is considered the Cobalt SS's main competition? I think I'll be more direct next time so SSCobalt doesn't bust a vein in his forehead.

How in the f**k do you think a BOV is SRTish???? That makes no sense at all, SRT 4 just came out a couple of years ago. People have been using blow off valves since the beginning of turbos.


because SRT4 owners seem to love fuckin hittin the BOV to show off
fuckin idiots

because SRT4 owners seem to love fuckin hittin the BOV to show off
fuckin idiots


I have yet to see an SRT-4 driver to that, I hear them more on WRX's. Lets not take this thread off course into an SRT-4 rant thread.

i like my scream better than psh....

Turbo is good on certain cars a superchargers are good on certain cars. Not one of them is better than the other. Blow off valves take the air that was taken by the turbo and lets it out. Superchargers do not need this due to the fact that we dont take in air the same way. Correct me if im wrong thanks.

yeah, your wrong...lol (i believe)

A blowoff valve is for: your TB (throttle body) blade closes when you let go of the gas, creating backpressure against the turbo, centrifugal SC. A blowoff valve releases this pressure buildup at the TB blade.

oh and turbo>SC anyday... :cool: p.s. SRT4's dont come stock with a BOV :rolleyes:

because SRT4 owners seem to love fuckin hittin the BOV to show off
fuckin idiots

The very first time I saw one he drove past me and blew it like 12 times...

Turbo is good on certain cars a superchargers are good on certain cars. Not one of them is better than the other. Blow off valves take the air that was taken by the turbo and lets it out. Superchargers do not need this due to the fact that we dont take in air the same way. Correct me if im wrong thanks.


You are 100% right in my semi educated opinion.

The very first time I saw one he drove past me and blew it like 12 times...
http://img165.imageshack.us/img165/2637/phot4un.gif (http://imageshack.us)

I was also told that blow-off valves could be put on superchargers. I'd love to have that "PISH". Yeah, I'm a fucking idiot show off.

so in the end not a good idea to put one on the SS or is it? cuz i knwo u can get one...

im loving the turbo>SC thing its real funny but like they are both equally modable yah you can get a bigger turbo and what not but if they are so great why the cobra and GT40 both run superchargers..like who really cares

Okay how many stock American made FWD cars come with a BOV? What is considered the Cobalt SS's main competition? I think I'll be more direct next time so SSCobalt doesn't bust a vein in his forehead.

My 1986 Pontiac Sunbird GT 1.8L Turbo had a wastegate (or BOV as everyone seems to call it here) on it.

The very first time I saw one he drove past me and blew it like 12 times...

That's not a good thing. The only time you should hear one is during gear changes, or if the car is hitting the rev limiter and cutting off the fuel supply to the engine.

Because they are easier to maintain and install?

Also they are not quite equally moddable. I can get a boost controller and easily regulate how much boost I'm running... Lets see you get out at the stoplight and change that pulley before the light goes green.

You can just step on the gas a bit to get it in boost and then let off and the bov will sound.

im loving the turbo>SC thing its real funny but like they are both equally modable yah you can get a bigger turbo and what not but if they are so great why the cobra and GT40 both run superchargers..like who really cares

Ford believes that real race depends from a stop. When it comes to off the line, SC or NA pwns turbo anyday. Which is why most staged SRT-4 cars featured in video's are done from a roll.
http://personal.tcu.edu/~tempvids/srt4_vs_many_others.mpg
He raced one guy from a dead stop, who obviously had some serious driver error going on. I don't even think he moved. Any of the other cars would of owned his face off (and probably did) from a dead stop.
We will see what kind of gain I get out my M90 swap, and then we'll see how many people swap instead of switching to turbo or twin charging.

I was also told that blow-off valves could be put on superchargers. I'd love to have that "PISH". Yeah, I'm a fucking idiot show off.

If showing off is what you like, why not get NO2 blow off...
clean up your language too, this is a public forum...

My 1986 Pontiac Sunbird GT 1.8L Turbo had a wastegate (or BOV as everyone seems to call it here) on it.

A wastegate vents exhaust between the manifold and the turbo. The BOV vents air between the turbo and the throttle body. The two are not the same.

A wastegate vents exhaust between the manifold and the turbo. The BOV vents air between the turbo and the throttle body. The two are not the same.


You are correct but the two (waste gate & BOV) attempt to do the same thing (reduce boost to stay below unsafe levels) in two different ways. Wastegates are old school if you will.
On a side note some Supercharged engines have a BOV type device. It is called a burst plate and is located on the intake manifold. It is an aluminum plate designed to rupture at a specific pressure to protect the engine and blower. These burst plates are a ONE time use only. I really dought ourr cars have burst plates because we are not over driving our superchargers. 05SDI

You are correct but the two (waste gate & BOV) attempt to do the same thing (reduce boost to stay below unsafe levels) in two different ways. Wastegates are old school if you will.
On a side note some Supercharged engines have a BOV type device. It is called a burst plate and is located on the intake manifold. It is an aluminum plate designed to rupture at a specific pressure to protect the engine and blower. These burst plates are a ONE time use only. I really dought ourr cars have burst plates because we are not over driving our superchargers. 05SDI


There is nothing "old school" about wastegates. Every turbo system is equipped with one to open once the turbo has reached a desired boost level. The system would just continue to build boost if one was not present.

As fas as a BOV is concerned. Most stock turbo systems use a bypass valve which reroutes air back into the intake once the throttle is snapped shut. This is meant to prevent compressor surge not maintain safe boost levels. Compressor surge is when boosted air is forced back into the turbo because it has no where to go. Effectively trying to spin the turbo in the opposite direction. All a blow off valve is is a bypass valve vented to the atmosphere. And all this usually does is hurt performance. The "blown off" air has already been metered by the ecu and it will add fuel based on that air. Therefore when that air isnt present it will bog down with extra fuel. To vent to the atmosphere you need to either set your air flow sensor up in a blow thru set up where it is located after the turbo. Or replace it completely with a product like the HKS VPC.

Sorry i had to vent. I hate when people give misinformation on forced induction. I can go into S/C air routing differences if someone really cares enough.

If showing off is what you like, why not get NO2 blow off... clean up your language too, this is a public forum...

Why spend the money wasting NO2....just get a bottle of CO2 and just use the system but dont waste the NO2..people wont know the difference :cssNET:

Ok ok... if you really want the "blow off" sound, and many of you probably have seen/read about this: www.takakaira.com/accessories/nightpager/nightpager.html (http://www.takakaira.com/accessories/nightpager/nightpager.html)
:lol:

I was also told that blow-off valves could be put on superchargers. I'd love to have that "PISH". Yeah, I'm a fucking idiot show off.


I think it might be possible on a centrifugal supercharged since it compress air in a simular way to a exhaust driven turbocharger.

Ok ok... if you really want the "blow off" sound, and many of you probably have seen/read about this: www.takakaira.com/accessories/nightpager/nightpager.html (http://www.takakaira.com/accessories/nightpager/nightpager.html)
:lol:
lol, I heard that adds 20+ hp to the wheels :lol:


That is probably up there for the most embarrising accessory you put on a car. I'd have more respect for someone with a 12' tall wing than someone with a "BOV" noise maker.

Why spend the money wasting NO2....just get a bottle of CO2 and just use the system but dont waste the NO2..people wont know the difference :cssNET:

I figured he would want to show off the NO2 bottle instead of a paintball CO2 tank. ;)

Ok heres my awesome opinion....

I love superchargers

I love Turbo

SUperchargers I THINK are much better for daily driving... they give you more low end power, which is where you should need it in a dialy driver and I THINK are really better designed for a normal application

Turbo Chargers ARE THE BEST IMO for any typer of racing really... hands down but thats just my opinion...


SO why not just have the best of both worlds and twin charge your cars.... lol

Not to be an ass but if turbos are the best for racing why do funny cars use superchargers? And they are some of the fastests cars out there.

I figured he would want to show off the NO2 bottle instead of a paintball CO2 tank. ;)

You can still have a NO2 bottle to show off im just saying dont waste NO2 but just use the CO2 instead cuz its a lot cheaper

Here's probably the fastest street car.... and its a 300HP supercharged Honda Type R engine
http://www.arielmotor.co.uk/04/frames.htm
0 to 60 in 2.9 seconds :bow:
http://www.openwheelers.com.au/videos/Top_Gear_Ariel_Atom_2_Full_segment.mpg

OMG did you see that guys face...LMAO that thing is nuts :cool:

:lol: "OH MY GAWD!!!"

HAHAHA

Not to be an ass but if turbos are the best for racing why do funny cars use superchargers? And they are some of the fastests cars out there.

Turbo's are better for Road Racing and such applications. Drag Racing on the other hand dosn't have the time available for spooling up of a turbo, hense a supercharger is a better application.

Turbo's are better for Road Racing and such applications. Drag Racing on the other hand dosn't have the time available for spooling up of a turbo, hense a supercharger is a better application.

EXACTLY!!!! You hit the nail on the head.
Turbos are designed primarily for horsepower and mainly used on engines that operate at high revs most of the time, such as road racing(Grand prix, Indy, etc.).
They operate most efficiently at higher engine speeds(powered by exhaust).
They release pressure(by-pass/blow off valve) because even when you close the throttle they continue to spin at high RPMs, making boost when its not needed. On most engines, the engine will decellerate faster than the turbo, because it spins free, the only resistance being the boost itself. So as not to blow seals, the excess boost is released.
Superchargers are designed for torque, and are used on engines that need power in the lower RPM ranges. They are powered from the crank, the boost being instant if set-up this way. A supercharger does not need a pressure releif valve as the boost decreases as the engine RPM decreases. The most powerful engine I ever built had an 8-71 supercharger running 38% overdriven(the blower ran 38% faster then the crank). I cant remember the psi in the cylinders but as an example-The owner refused to let me O-ring the block, said its not necessary. I told him he never had the motor right and it would. (he braught it to us because he couldnt get it to run better than 8 sec 1/4) Anyway, we gauranteed our compitition engines for 30 secs or 30 feet, whichever comes first, only if we were the ones to start the engine 1st time, so I was there. Long story short, we blew 5 cylinders in 20 secs, thats how much pressure this thing made. Approx 2500 HP, 510 ci in. No bypass, just a blow back plate as mention earlier in this thread.
SO - why does the SS have a bypass valve? I don't know for sure but I would guess because it is sold to the public and is expected to last a long time without service. Also, if the boost could not be reduced by the ECU, what would happen if you had to run a low octane fuel.
Proof? I've been running my SS with the by-pass disabled since last thurs, no trouble codes or any other issues(I run 94 octane).
SS vs SRT - The ss has a smaller engine than the srt and the SRT will produce more torque in the lower rpm ranges than our 2.0s. Torque is directly related to the area of the top of the piston.
Example - take 2 engines that are the same displacement but one has a greater area(larger piston dia) than the other. The other arriving at the same dislacement with added pistons say V10. The V10 will not make as much torque as the other at identical RPMs.
SO - being that the SRT makes decent torque at lower rpm, the turbo makes sense.
The SS doesnt have much low rpm torque so GM went with a supercharger to make up for it.
This is why the SRT comes off the line usualy ahead of the SS even with the supercharger.
Im sure this car could be boosted at idle but I don't know how you would keep tires on it and would come off the line alot stronger. (a larger blower i think would be needed, more cfm)
Turbo - HP
Blower - Torque
They have an effect on both of these measurenets but above is the design intention.
Sorry so long, I hope this helps. :cool:

Might I add this a quite pointless thread. Especially if majority of people doesn't quite know how exactly neither turbo or supercharger work.

The IDEA of a BOV on a supercharger is rediculus, since it is much needed for a Turbo setup.
Ata glance a TURBO system works of an exaust pressure spooling up the Turbo, the purpose of the BOV is to release the extra pressure the turbo creates when the throtle body closes(when the gas pedal is released) the completely useless air creates pressure right at the throttle body which inreturn is released by a BOV in a "PISH" sound.

Supercharger works off a Pulley System off the CRANK, thus having no "Turbo Lag" and in Supercharger's Case you have BOOST even if you are Idling, Turbo Doesn't, it needs time to spool up making the 1st gear in Turbo Cars pretty much powerless compared to 2nd and 3rd (the spool LAG depends on a Turbo setup in cheaper ones it is quite long, in some expansive well tunned turbo setups I've seen in years it is hardly noticable)

As for the question of TURBO vs S/C the turbo setup has an almost endless Upgrade Capability and is EXTREMELY dependant on careful Tunning of the ECU and Fuel Management Systems in other words a stock Turbo on a car can be Tuned to Extreme power but at a cost of a Engine, The Supercharger on the other hand is practicaly unupgradable exept some minute pulley swaps and Intake upgrades which lets face it will give you what 2-6 boost hah, to notice any sort of large power gains in a Supercharger the whole supercharger needs to be swapped. The only thing Supercharger is better in is that it is much less maintance and is a lot DUMB user friendly, meaning if you don't screw around the engine won't blow.

I mean C'mon we make 220hp at 16psi, while my friends Tunned 92 RX7 makes 364whp at 8psi on an HKS Ballbearing Turbo and a 1.3L Rotary Engine, in comparison it is quite pathetic.

Nevertheless BOTH have their Advantages but to Have POWER and I mean REAL power you need a TURBO or to an INSANE POWER extent you go TWIN a TRIPLE T.

And to finish it of the VTEC shouldn't be even mentioned here, we are talking about FI here not some Japanese Variable Valve Timing Systems which are by far absolete in power. Don't get me wront HONDA nation overthe years I have seen some very impressive N/A VTEC cars doing some ipressive 1/4 mile times but lets face it the concept of high compression engines contradicts F/I because as a base of TURBOING such cars as TypeR B18C5, and Civic SiR B16A2 you need to buy kits to lower their compression to make them suitable for F/I.

This is my personal opinion ofcourse but is based on quite a bit of experience and both Turbo, S/C and V-Tec car ownership, I have been in a tuner worlf for quite a while. HAH :)