Cranking Pressure?

[art leong]

Originally Posted by Billy Nees

Hi Art, cranking pressure CAN be affected by your lifters not pumping up. I would say that 300 psi is too much but then I was taught to try and keep cranking pressure "more than 160 and less than 210" and I could have been taught wrong. When I was running really high compression Bracket stuff (15 to1) I was only winding up with about 210 but I was using pretty big cams.
If anybody has any other opinions I'd like to hear from them.

Billy I tried retarding the intake cam 6 degrees (dropped the cranking pressure to 270)
It slowed the car up. Put the cam back and I got the power back.
I had to change the timing offset. when i retarded the cam.
Then I had a brain fart and forgot which program I had in there (there are 13 different fuel curves). It took me 5 runs to figure it out, wasting a test and tune day.