Hey,

anybody with a prodrive 3-port boost solenoid have an 'air whirling' noise when coming on boost? at around 3-4k after that it dissapears... to me it's a really horrible noise just wondered if it's normal?

I have it plumbed back into the intake also...

 

Can't say I've noticed anything like that. Can hear the solenoid itself from time to time but it doesn't alter the induction or boost noise.

If you had your car mapped after fitting the solenoid, is it possible that the turbo is spooling up earlier and more enthusiastically than it used to and this is causing what you're hearing?

 

hmm...gona vent it off to atmos...see if that changes it...

my mapper checked it over and the car was performing and running ok,just the solenoid wasting pressure...

 

do most people return them to the inlet,or vent off to atmosphere?