Cranking Pressure?

[Chris "drooze" Wertman]

Originally Posted by art leong

Thanks Chris I saw those sites. Right now I'm wondering if there is something going on with my lifters. It just doesn't make sense that I could have such high compression numbers and stil have the car run the way it does.
The gauge is a brand new gauge so I'm going to borrow one and see if it is the same.

What with your bore stroke and duration did it come to on the calc if you dont mind me asking ?

[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.

[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.

[Billy Nees]

Art, did you check it with a plugged lifter yet?

[art leong]

Originally Posted by Billy Nees

Art, did you check it with a plugged lifter yet?

No I have just come to the bare fact that it it's running right don't mess with it If you do You will find something wrong.
The motor is making great power I still am close to getting in trouble with me shifting 1500 short. Even I am wondering "where the turbo is hiding"LOL
I seem to have worried myself silly (something I'm real good at) for a couple of weeks for nothing.
It's like the movie Dr Strangelove, or How I learned to stop worrying and love the Bomb.

[Jim Wahl]

Hey Art, "just turn the screw". LOL. Jim

[art leong]

This car doesn't have a screw Jim. It has a button on the tach, serves the same purpose though