2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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Q's Boost

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Old 04-12-04, 08:39 PM
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Q's Boost

ok I took off my vac hose from the waste gate and still only boosting 10psi max and as the RPM get higher the boost drops to 8-9psi, without the wastegate opening there should be more than 10 psi ??
what do u guys think
I am thinking wastegate is not closing properly, or the turbo is giving up
any other suggestions
Old 04-12-04, 08:47 PM
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Clogged cats?


-Ted
Old 04-12-04, 10:57 PM
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cant be I just put a new exhaust on it like 2 weeks ago
SS 3' all the way back to the y-pipe and 2.5' y-pipe
brand new highflow cat and mafnaflow mufflers all stainless
Old 04-13-04, 08:42 AM
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anyone got a suggestion?
Old 04-13-04, 08:31 PM
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Something is wrong. My S5 will boost right past 1 bar to unsafe levels. Check under the hood for vacum leaks. How old is your Turbo?
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