2nd Generation Specific 1986-1992 Discussion

Boost Problem

Old 05-02-2004, 09:41 PM
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Well, I dynoed my car at Revolution, and I was expecting to break 300rwhp or at least get close to it. However, I only put down 270rwhp due to boost problem. I'm running about 12psi but at 5500rpm, the boost drops down to 10psi or less, making my power curve flat from 6000rpm all the way to 7000+rpm. I do not hear any boost leaks when I was looking for it on dyno, so what could it be? Could there be something wrong with my BOV? I really have no idea about where to starting looking... Please help!

Thanks in advance.
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Old 05-02-2004, 11:59 PM
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Stock turbine???
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Old 05-05-2004, 01:25 AM
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Hybrid turbo with unknown spec...



Also using:



Turbo XS MBC



Stock ported WG



Greddy Type-S BOV





Any inputs appreicated...
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Old 05-05-2004, 10:42 AM
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ported motor?
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Old 05-05-2004, 11:04 AM
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try a dif. boost cont. ditch the mechanical and get a greddy profec or blitz sbc they hold boost better. It could also be the turbo perhaps the ported gate isnt sealing well.
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Old 05-05-2004, 04:06 PM
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You might need to get your exhaust wheel clipped.
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Old 05-05-2004, 07:33 PM
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this thought also came to mind. it is possible that you bov is venting a worn spring or too weak a spring will do that. My friends blitz did that.
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