DallasDub94
Go Kart Newbie
What would be the symptoms of a cracked downpipe? I've heard of a few people having Cobb downpipes crack on them at the flange.
Currently my car performs well. However whenever I get into boost, there is very loud noise that comes from under the car. I can tell it's a turbo noise, just sounds like air/exhaust is escaping somewhere it shouldn't. It's not a turbo squeal or failure noise. Most audible at part throttle, partial spool.
Aside from the noise my LTFTs are consistently in the .93-.95 range at speed no crazy variances, it's just off. However they often return to .98-1.00 at lower speeds and idle. STFTs seem mostly normal.
If I'd have to guess, I'd say I have a crack at my downpipe flange right before the upper o2 causing the disparity in fuel trims. Downpipe is wrapped flange to catalytic converter so I have to drop it to check.
Or I have a crack somewhere on my exhaust manifold, but I think that's unlikely. Had the turbo dropped and gasket changed as well as broken studs fixed.
Downpipe is most likely coming off next week. Bracket rubber is cracked all the way through so I'm using it as an excuse to drop my downpipe. Also changing from dv+ to turbosmart em vr1.
Thoughts? Anything else this could be? Charge system has been checked countless times... it's not a boost leak whistle.
Who has had a cracked downpipe?
Currently my car performs well. However whenever I get into boost, there is very loud noise that comes from under the car. I can tell it's a turbo noise, just sounds like air/exhaust is escaping somewhere it shouldn't. It's not a turbo squeal or failure noise. Most audible at part throttle, partial spool.
Aside from the noise my LTFTs are consistently in the .93-.95 range at speed no crazy variances, it's just off. However they often return to .98-1.00 at lower speeds and idle. STFTs seem mostly normal.
If I'd have to guess, I'd say I have a crack at my downpipe flange right before the upper o2 causing the disparity in fuel trims. Downpipe is wrapped flange to catalytic converter so I have to drop it to check.
Or I have a crack somewhere on my exhaust manifold, but I think that's unlikely. Had the turbo dropped and gasket changed as well as broken studs fixed.
Downpipe is most likely coming off next week. Bracket rubber is cracked all the way through so I'm using it as an excuse to drop my downpipe. Also changing from dv+ to turbosmart em vr1.
Thoughts? Anything else this could be? Charge system has been checked countless times... it's not a boost leak whistle.
Who has had a cracked downpipe?
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