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Over boosting

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gixrman

gixrman

20+ Year Contributor
1,997
17
Nov 13, 2002
Frederick, Maryland
I'm having a serious problem with over boosting. I just installed an EVO III 16g and when I nail it it slowly builds boost and then flys to 25-30 psi. I adjusted the MBC and it has no efffect. I have no compressor nipple could this be the problem? I have it going from the wastegate to the MBC and then to the manifold source.
 
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