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Old 06-07-2012, 02:10 AM   #1
danny_d19
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Default Installed new turbo inlet hose, BPV is very quiet

Before I installed the Perrin turbo inlet, my setup was stock inlet hose with Cobb SF intake and air box, catted turbo back exhaust, Cobb stage 2 tune. The BPV noise was pretty loud, as many of you know. The BPV gasket was replaced with a new one the last time I had it off, which was about 3 months ago.

Just installed the Perrin turbo inlet, double checked all connections, the turbo spool is a little louder but the BPV noise upon letting off the gas at low boost and below is almost non-existant, it's very quiet. At high boost it's back to being a loud whoosh. Is this normal? Does the new larger inside diameter hose cause this?
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Old 06-07-2012, 11:36 PM   #2
danny_d19
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anyone?
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Old 10-03-2012, 10:23 PM   #3
jhaddock07
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Bump... Having the same issue... I've checked and rechecked all the connections regarding the inlet and can't figure it out... It ended up throwing my CEL which to me seems to be a vacuum leak but I can't for the life of me figure it out
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Old 10-03-2012, 11:42 PM   #4
mechatricity
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I had to do a significant amount of re-jigging with the bpv recirc hose when I installed my inlet. Make sure it isn't kinked.
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Old 10-04-2012, 11:56 AM   #5
jhaddock07
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Quote:
Originally Posted by mechatricity
I had to do a significant amount of re-jigging with the bpv recirc hose when I installed my inlet. Make sure it isn't kinked.
That's the conclusion I came to yesterday evening... No boost or vacuum leaks... I have a Perrin replacement tube so hopefully that will fit better... A couple of buddies came over as well to help try and diagnose it to no avail...

Pulled the BPV off and it's takes. a LOT of force to open that valve up..worked on it some more this morning some more before work... I have an extra BPV and I tested how much force it took and its about the same as the other one... It's still not releasing pressure though... Any idea how tough it is to push that flange open generally? That's my last guess once I replace the factory tube with the Perrin silicone one?
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Old 10-04-2012, 04:09 PM   #6
mechatricity
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I replied to your PM, but i've never actually tried to actuate the BPV by hand.

So does boost pressure actually fall off slowly when you let off the throttle?
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