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272's installed boost went down

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Old Jun 3, 2005 | 09:01 PM
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272's installed boost went down

I have noticed that my boost has gone down since I installed my 272's is this correct? I was peaking in the high 23's now in the mid 22's also was holding 20ish to redline now i am only holding 18-19.... Should I crank it up a notch?

Last edited by ThEHiTMaN; Jun 3, 2005 at 09:05 PM.
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Old Jun 3, 2005 | 10:33 PM
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Boost is gonna go down because the higher lift intake cam decreases vacuum pressure. I would recommend getting a tune before turning up the boost.
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Old Jun 4, 2005 | 05:59 AM
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^ true
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Old Jun 4, 2005 | 06:10 AM
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the longer you keep the valves open, the more boost that goes into the cylinders, the less pressure is measured in the intake manifold. Thus a lower reading. Make sence?? Cranking it up with out logging AFR and knock could be risky. I would advise you tune it.
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Old Jun 4, 2005 | 08:38 AM
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264's dropped my stock boost to 13psi.
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Old Jun 4, 2005 | 10:43 AM
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would reflashing the ECU fix the idle that the 272s give the car? Or it wont help?
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Old Jun 4, 2005 | 10:49 AM
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A reflash will help, and also the use of adjustable cam gears.......both will give u a stock like idle.
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Old Jun 4, 2005 | 11:42 AM
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I might just invest in a Wideband and tune it myself.

Last edited by ThEHiTMaN; Jun 5, 2005 at 01:43 PM.
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