Hi Andy the specs I had were idle hot ^176* 17 to 28 psi and at 3700rpm 48 to 56 psi I had hot 196* at idle 9psi off idle 3700 rpm 55psi .It was weird because when I went to 3700 I used a long rod and the power seat to hold the throttle at the correct rpm .(An... Login to read more.