currently running about 10-12 psi on a stock blow off valve. vortech s trim. thinking about upgrading to a different blow off valve. what exactly will i see diifferent once i change the valve. any performance gains?
i doubt it. i'm running about that much without a blow-off valve. just not worth it with centrifugal superchargers like it is with turbos. if your racing it or want to get crazy detailed with the car then go for it but the mondo bypass is supposed to be decent enough.
As long as it's not leaking, I wouldn't worry about it. Like ProKiller said, the opening time on a blow off valve for a blower just isn't as critical as it is on a turbo.
The small plastic Bosch valve is fine up to about 20 pounds with that size blower, if you had a larger blower moving more air the Vortech Mondo or the ATI large Red valve is very good.