What are the reasons that could cause my boost to hit 8psi then fall to 6 or 5 almost right away? I have an internal waste gate.
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Leaky wastegate. Leaky boost pipes. Leaky BOV. -
wastegate lag whats is the wastegate set to?
exhaust piping, manifold design, there is alot of things at work here.Comment
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sounds like a boost leak test is needed. In my experience if you look at your car wrong you will get a boost leakComment
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Haha i would agree, ok thanks guys. I had a feeling that it was one of those things, but i figured i should ask incase there was something i missed. I will go tighten things up and then go from there.
Whats the best way to test for a leak?
Just doing the whole block off both sides and use an air compressor?Last edited by Lrutts; 07-17-2011, 01:00 PM.Comment
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On one of my cars I take the intake off the turbo and attach to that With whatever works for you size intake. For me it was a 2 inch mission band with pvc cap and thread in a schrader valve. Get a compressor and pump it up and you will hear the leaks or spray soapy water on pipes and bubbles will appear. You will have to cap off a couple lines that will just leak air I dont know your set up mine is one of those turbo neons.Comment
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Try and get it to hold 15lb for as long as possible you will get some leak by in the headComment
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On my car i switched to an external waste gate and that seemed to help with boost spike alsoComment
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Are you able to hear any faint rattling during boost?
1991 325iS turbo
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Whats yor wastegate supposed to be set to?Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.
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