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Go Back   IWSTI.com: Subaru WRX STI Forums > IWSTI Engine & Drivetrain > 2.5 Liter/Litre Factory Motor
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Old 12-27-2005, 06:29 AM   #11
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Quote:
Originally Posted by jgheels2003
It is surge. Its at low RPM when the throttle body is closed you are getting some compression coming back at the spinning compressor wheel (causing the sound) since it is not quite free enough to pass through the bpv and into the intake. Thats what it is.
i get this with my green at low rpms in high gears
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