Drivetrain (Cooper S) MINI Cooper S (R53) intakes, exhausts, pulleys, headers, throttle bodies, and any other modifications to the Cooper S drivetrain.

Drivetrain Need some help 17% pulley on 14psi boost and drops at 5k to 10psi

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Old Apr 14, 2009 | 06:43 PM
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FlipSmini
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Originally Posted by MUShadd
are you feeling/hearing this drop in boost? Dropping 5psi is VERY noticeable. the car falls on its face, and you can hear a strange whine coming from the belt.

and i would like to know how you was getting 14psi at 3k...there is no reason it should be that high at such a low rpm. as your rpms rise, your psi should rise in unison...as the engine turns faster, ur sc turns faster, thus your psi goes higher...you sure that boost gauge is accurate?. youre not turbo'd
i think 1 was getting that from the slipping, no idea otherwise, but sure enough, thats what my gauge was telling me.
 
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