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Old 05-08-2006, 10:43 PM   #1
scooby888
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Default Boost leak?

I don't think there is a very easy solution to this, but I went to get dynoed last Saturday and found out I have a boost leak somewhere. Now yes I did have an HKS SSQV BOV but that is not the problem and I was tuned with it on (EcuTEK). Now my car won't hit target boost at all (16 psi). I've tried putting on other BOV's and BPV's but all have the same results, the leak is somewhere else. With all the changing of BOV's and BPV's I am aware I need to change the BPV gasket, but I don't think that gasket is enough to lower boost by 3 psi.

I figure the uppipe, downpipe and catback all happen after the turbo so it can't be those.

Still made 226 whp at only 13 psi though! (Dynomite Dyno)
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Old 05-08-2006, 10:49 PM   #2
KAX
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um... uppipe is before the turbo? unless your getting really technical with itbeing an exhaust peice. Pull of the intercooler, and get some IC hoses. It seems like most boost leaks on the stock IC happen in the Y-pipe.


and you cant tune a BOV, no matter what your tuner told you.
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Old 05-10-2006, 11:33 PM   #3
scooby888
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I have a Samco silicon hose already on the intercooler (the Y pipe piece- I should have mentioned this). It looked fine. I also have the Hyperflow 2 TMIC.

Yes, uppipe is before the turbo but that looks fine. Typo on my part. I had a lot less backfire after the tune, so I figured something was done about it...guess not...

Any other ideas anybody?
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Old 05-11-2006, 03:38 AM   #4
KmanRuffian
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Quote:
Originally Posted by scooby888
I have a Samco silicon hose already on the intercooler (the Y pipe piece- I should have mentioned this). It looked fine. I also have the Hyperflow 2 TMIC.

Yes, uppipe is before the turbo but that looks fine. Typo on my part. I had a lot less backfire after the tune, so I figured something was done about it...guess not...

Any other ideas anybody?

How do you know the BOV isn't leaking? Make a little pressure tester and pressure test the intake tract... That'll tell you for sure if and what is leaking.

-D
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Old 05-11-2006, 03:44 AM   #5
supermarkus
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a leaky BOV gasket is certainly capable of leaking 3psi. Check your IC hoses and elbows for leaks or holes.
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Old 05-11-2006, 08:41 AM   #6
REXtard04
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Maybe the recirc plug isn't fully sealed? I've got the HKS BOV and have no problems with it, other than the occasional backfire (which is expected with a 100% atmospheric BOV)
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Old 05-11-2006, 02:28 PM   #7
KmanRuffian
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Quote:
Originally Posted by REXtard04
Maybe the recirc plug isn't fully sealed? I've got the HKS BOV and have no problems with it, other than the occasional backfire (which is expected with a 100% atmospheric BOV)
Ah young grassshopper but you don't know if you have a problem with it leaking unless you pressure test your system or measure post turbo intake temps... You may make full boost fine but your turbo may be having to produce more boost to make up for a leak. Just ask Davenow, he'll tell you all about BOVs and his experiences... Basically he found they all leaked and overworked the turbo (as measured via post turbo temperature probe).


-D
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Old 05-11-2006, 03:32 PM   #8
Paul
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ummm if i had a boost leak i would do a boost leak test. Heres how to make one if you don't know http://forums.nasioc.com/forums/show...&highlight=DIY
FYI: the hks bov is known to leak
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Old 05-14-2006, 12:41 AM   #9
scooby888
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Quote:
Originally Posted by supermarkus
a leaky BOV gasket is certainly capable of leaking 3psi. Check your IC hoses and elbows for leaks or holes.
I will try to put on the new gasket as soon as it stops raining here.
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