I can't say how the CSU version works, but the one I have from Horsepowerinnovation is linear to boost. It's not just on/off based on boost.
It has a piston and spring which is overcome by increasing fuel pressure, a pair of transfer slots meter the fuel based on boost psi.
Works fairly well...its A LOT better then just a stock power valve setup.
Dizuster would you mind if I could call you and talk to you about the type you use ? Or you can call me when you have time if you don't mind. If you don't get me just leave a message if you don't mind calling and if you do I understand. My phone # is 443-904-7898 or you could PM me your #. I tried to PM you but it said it full. Thanks , Ron
