Originally Posted by 90GTNovi2000
I'm running the plastic bypass valve that was included in the kit. While driving if I'm over 4k rpms and let off the gas it will suck to a -20 boost I'm not sure if that is safe but everything seems good to go with my setup and it was professionally tuned. But I also would like to know if the bypass valve that came is good or if there is something better that i should get? And would it require a tune?
Changing the Bypass Valve won't require a re-tune.
What I'm thinking is that a larger Bypass flowing more CFMs would be better and easier on the supercharger, since it would dump more boost pressure faster when the throttle is closed suddenly.