http://kb-silvolite.com/calc.php?action=comp

I'm planning on a new heads/cam/intake setup and want to run 11:1 static compression. I've heard as long as the dynamic CR stays in the 9.0-9.2 range you will be able to run pump gas. The calculator I linked above requires you to know IVC @ .050. My cam card gives valve timing events @ .006. What do I do?

 

You can use this calculator which uses the @.006 durations to find your DCR. For pump gas you want it between 8.0-9.0 with most running close to 8.5 or less.

http://www.empirenet.com/pkelley2/DynamicCR.html

You have to download it at the bottom of the page and install it.

 

It really doesn't matter as no effective flow occurs at such low lifts. Advertised duration is often quoted at 0.006" lift.

Rich