I just bought and installed an ARC bov on my '87 supra turbo. I did this to eliminate turbo flutter that i thought was caused by a bad stock bov. The turbo doesn't "flutter" as much when shifting under boost but its still noticeable. Any help diagnosing this problem would be good....also, i notice the car stumbles a little when shifting. Is that because the bov doesn't reroute back into the intake?