Boost Addicted Posted April 13, 2004 Report Share Posted April 13, 2004 While running a ball and spring MBC my boost is hitting 12psi and dropping to 5psi by redline. Using the stock boost valve, I'm only making about 5psi sometimes. Sometimes I'm making 14psi. Boost comes and goes. Link to comment Share on other sites More sharing options...
Bill at Adrenaline Racing Posted April 13, 2004 Report Share Posted April 13, 2004 A vacuum pump on the actuator. Like used for bleeding brakes. It should pull open at 6 or 7psi if I remember right. And it should stay as long as the pressure is there. Link to comment Share on other sites More sharing options...
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