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Old 11-01-2010, 11:32 AM   #129 (permalink)
christian370z
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Join Date: Jul 2010
Location: Newport Beach
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Drives: 2010 370Z/Saab 900se
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Quote:
Originally Posted by DannyGT View Post
Quick update on mine too...To echo what Shumby has said, the torque is very significant down low. Additionally, I had some flutter too...But I ran a couple of tests, including bypassing the bypass valve entirely and the flutter is gone, so it doesnt seem to be resonance, just simply the BPV. If thats the worst of it than I'm sure it will be an easy fix. You dont hear it at idle, or under any load above 30-40% throttle...its 100% during cruising. I dont count decel or in between shifts because thats how its suppose to work.
Do the GTM kits come with that plastic Bosch BPV? I used to run that stock in my old Saab 900 and once I got up to 360hp and 20+psi, it would flutter because the internal spring was simply not up to the task of holding back that boost or releasing it effectively.

I would definately move onto another BPV; I have had great experience with Forge personally.
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