Drivetrain (Cooper S) MINI Cooper S (R56) intakes, exhausts, pulleys, headers, throttle bodies, and any other modifications to the Cooper S drivetrain.

Drivetrain Will a higher rated spring fix this?

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Old Mar 15, 2014 | 06:35 AM
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Ian Landesman's Avatar
Ian Landesman
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I'm running increased boost and notice that turbo spool up to stock boost (10.5 PSI) is VERY fast but spool past that is rather slow. I'm wondering if my stock recirc valve spring is to blame or if this is normal behavior for the stock S turbo? Do you who run increased boost notice drastically slower boost building past 10.5 PSI? Any fix? Thanks?
 

Last edited by Ian Landesman; Mar 15, 2014 at 06:50 AM.
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Old Mar 15, 2014 | 06:34 PM
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Ian Landesman
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Old Mar 17, 2014 | 08:42 AM
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Ian Landesman's Avatar
Ian Landesman
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Could it be the stock charge piping leaking past stock boost levels?
 
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