Originally Posted by nice_head
its running at 22psi at the mo. My bro has got a cossie aswell and he has the dump valve at low revs and the wastegate at high revs but all i have is the dump valve sound..
22psi is gonna be dangerous, whitout DV. and if you have chatter on hi revs, then you will have schatter on hi boost too, and it will cause some damage. above 25 psi, it is surtain that damage will occure. amount of damage is dependent on luck. if bad luck, your turbo will be useless wery soon.