My fuel pressure is spiking right in synce with my boost with the RRR @ 4 to 1,so i am trying to figure a way to get a more smoother transition up to my max of 22psi .the grainger valve is giving hight to full boost @ half throttle ,when it does it throws my fuel pressure right up there to.This causes the car to get 75psi at half throttle ,that does not work very good,it spits and sputters and practicaly dies ,then if you play with the throttle and jam it then it takes off very hard and sorts itself out.so my question is ,does anybody have some ideas how to control this sudden increase of boost ?? I am still thinking it through but am also open to any thing you have to offer to .It would speed the fix up for sure. thanks ,The only thing i can think of is to two step the boost ,with a switch,run ,say, 14 psi one one end then when i hit WOT a micro switch will activate the 22 psi side.