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Blow Off Valves: Everything You Need To Know

2.0L LNF Performance Tech 260hp and 260 lb-ft of torque Turbocharged tuner version.

Blow Off Valves: Everything You Need To Know

Old 07-07-2011, 01:36 PM
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Exclamation Blow Off Valves: Everything You Need To Know

Myself being a turbo n00b and with the SS/TC being my first forced induction car I figured I'd create a thread to help those, along with myself, who are uneducated and want to run charge piping with a blow off valve. If you have had experience with upgrading your charge piping and adding a blow off valve, please post your thoughts, experience, and knowledge about how to do so. There are so many options with upgrading to a blow off valve setup I want to do it the right way and not look back regretting my decision.

Such options include: MAF block, bypass valve block, atmospheric vent, recirc vent, etc.

Now I know I may get flamed for this because members say the bypass valve is more than sufficient, but I can't help myself with the satisfaction that comes from the sound of a blow off valve.

Thanks in advance.
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Old 07-07-2011, 01:53 PM
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Well i have the Dejon pipes and have had them for like 2.5 years now with the Greddy flange on them.

I am running the BPV blockoff plate and you simply take that line and run it to the BOV but please for the love of god tune your **** for it and all will be well.

Oh and i just got my car retuned and my fuel trims were at 0 knock was at 0 so all is well with it
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Old 07-07-2011, 01:55 PM
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Originally Posted by BartSS View Post
Well i have the Dejon pipes and have had them for like 2.5 years now with the Greddy flange on them.

I am running the BPV blockoff plate and you simply take that line and run it to the BOV but please for the love of god tune your **** for it and all will be well.
Of course I'll be getting a tune. I just want to do everything right before getting the tune.

You're running the Greddy BOV now? How do you like it? Are you venting atmospherically or recirculating it through the intake piping?
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Old 07-07-2011, 02:04 PM
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Originally Posted by ssweeet View Post
Of course I'll be getting a tune. I just want to do everything right before getting the tune.

You're running the Greddy BOV now? How do you like it? Are you venting atmospherically or recirculating it through the intake piping?
Im running the Greddy RS and its VTA....
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Old 07-07-2011, 02:05 PM
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Originally Posted by BartSS View Post
Im running the Greddy RS and its VTA....
Nice. I've thought about getting either the HKS or TiAL.
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Old 07-07-2011, 02:08 PM
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Originally Posted by ssweeet View Post
Nice. I've thought about getting either the HKS or TiAL.
everyone and their mothers run the HKS... go for the Tial
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Old 07-07-2011, 02:11 PM
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^^^^ what he said
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Old 07-07-2011, 02:16 PM
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i also have the Dejon Pipes and HKS BOV on my car, i had the MAF relocate done to the lower CP and i ran it inline with my stock BPV and after a while my car hated it, i put my MAF back on the intake and BAM she runs likes a charm!! i havent had any major issues though, just my fuel trims got scewed every now and then with it on the lower CP but now thats its back on the intake its good to go
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Old 07-07-2011, 02:18 PM
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Originally Posted by 07SSYellow View Post
i also have the Dejon Pipes and HKS BOV on my car, i had the MAF relocate done to the lower CP and i ran it inline with my stock BPV and after a while my car hated it, i put my MAF back on the intake and BAM she runs likes a charm!! i havent had any major issues though, just my fuel trims got scewed every now and then with it on the lower CP but now thats its back on the intake its good to go
So the MAF relocate isn't necessary? I am going to get the ZZP upper and lower charge piping. I'm currently running the K&N SRI with stock piping.

Originally Posted by startingline05 View Post
^^^^ what he said
I like your thinking.

Last edited by ssweeet; 07-07-2011 at 02:18 PM. Reason: Automerged Doublepost
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Old 07-07-2011, 02:22 PM
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MAF relocate is NOT necessary.. if you have a good tuner then they will get you goin real well
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Old 07-07-2011, 02:24 PM
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Originally Posted by BartSS View Post
MAF relocate is NOT necessary.. if you have a good tuner then they will get you goin real well
Dub will be my tuner. You can testify for his skills.
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Old 07-07-2011, 02:32 PM
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Anyone care to post how to reroute vacuum lines if it is necessary? A picture would be great.
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Old 07-07-2011, 02:34 PM
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If you run a tial you will need to get the maf relocate. I have seen teh tials cause a p0101 because itll barely open up at idle and ect..... With the 22 spring!
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Old 07-07-2011, 02:35 PM
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Originally Posted by ssweeet View Post
Dub will be my tuner. You can testify for his skills.
Hell yeah dude im loving the tune... you wont be rerouting anything.. just take the line off the bypass valve and run it to the Tial.. and all you will need to do is buy a blockoff plate. Both ZZP and TTR have them bro its like $20
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Old 07-07-2011, 02:36 PM
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Originally Posted by Chevycobaltss3 View Post
If you run a tial you will need to get the maf relocate. I have seen teh tials cause a p0101 because itll barely open up at idle and ect..... With the 22 spring!
I've heard that the springs cause an issue and the BOV won't open. If anyone is running a TiAL can you chime in on this?

Originally Posted by BartSS View Post
Hell yeah dude im loving the tune... you wont be rerouting anything.. just take the line off the bypass valve and run it to the Tial.. and all you will need to do is buy a blockoff plate. Both ZZP and TTR have them bro its like $20
Good to know, bro!

Last edited by ssweeet; 07-07-2011 at 02:36 PM. Reason: Automerged Doublepost
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Old 07-07-2011, 02:39 PM
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i have a tial and mine opens fine. dont know if it makes a diff or not because my car is a lsj. i have a 10 pound spring. if you need it i have an 11 pound spring at the house i can sell you for 10 dollars plus shipping if you get the tial
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Old 07-07-2011, 02:48 PM
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Originally Posted by startingline05 View Post
i have a tial and mine opens fine. dont know if it makes a diff or not because my car is a lsj. i have a 10 pound spring. if you need it i have an 11 pound spring at the house i can sell you for 10 dollars plus shipping if you get the tial
The TiAL will come with a 10lb spring so I'm covered there. Thanks anyways.
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Old 07-07-2011, 02:50 PM
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i have a turboxs bov and i just took off the recirc hose to the intake. loudest bov ive ever heard in my life. ill make a vid soon
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Old 07-07-2011, 03:03 PM
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ya the MAF relocate is not needed, i am Trifecta tuned and its working good for me, i love the HKS though , if u look at the pic in my sig u can see my vac lines and how there routed, pretty much just T's off the stock BPV line and ran the T'd line to the BOV and bam its done, it uses the BPV at parking lot speeds and anything over that it goes to the HKS, more or less just tricking the car into thinking it is using the BPV still
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Old 07-07-2011, 03:06 PM
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W0ot another soon to be tuned by Dub!
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Old 07-07-2011, 03:06 PM
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Originally Posted by 07SSYellow View Post
ya the MAF relocate is not needed, i am Trifecta tuned and its working good for me, i love the HKS though , if u look at the pic in my sig u can see my vac lines and how there routed, pretty much just T's off the stock BPV line and ran the T'd line to the BOV and bam its done, it uses the BPV at parking lot speeds and anything over that it goes to the HKS, more or less just tricking the car into thinking it is using the BPV still
You mean that you didn't use a block off plate for your bypass valve? Interesting...
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Old 07-07-2011, 03:06 PM
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yeah the turbo xs is very nice I have had one on my previous car.... sounds beautiful and will be what I go with whenever I get around to doing this ... but its call Turbo XS RFL for a reason
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Old 07-07-2011, 03:07 PM
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Originally Posted by CobaltSST/C View Post
W0ot another soon to be tuned by Dub!
I'm aiming for Saturday 16th because I'll be on my way down to Myrtle Beach, SC. I'm not sure if everything will be in (parts) by then though.
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Old 07-07-2011, 03:08 PM
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Originally Posted by 1shotwonder View Post
yeah the turbo xs is very nice i have had one on my previous car.... Sounds beautiful and will be what i go with whenever i get around to doing this ... But its call turbo xs ReallyFuckingLoud for a reason

ftfy.
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Old 07-07-2011, 03:11 PM
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no really its too loud, like its annoying lol. even at 0 psi of boost its like psssssshhhhhhhhhhh
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