How to tune a type s?

[focusedrage]

Ill soon be putting on my type s, how should i set the screw? should it be loose so that anything over my set boost will trigger it, or tight so that it is one turn away from commpressor surge?

 

[larryd]

Make sure when you adjust the stiffness of the valve that you first loosen the lock nut before you adjust the setscrew. Adjustment will very from car to car, so you will need to use trial and error to find a good setting. Generally you want to valve as tight as possible, without getting any compressor surge. (Compressor surge will sound like a stutter.)m You don't want it too loose or it can open too early and you will loose boost. The valve should make one clean blowing sound, it should not stutter. It should also not open before the throttle is shut.

 

[focusedrage]

sweet thanks