Cam Install Question

midnight340 said
I have light springs to check piston/valve clearance every 10* or so. Can’t remember how much is recommended to be safe.

Running the Dynamic Compr. formulas off Wallace Racing it shows advancing the cam builds more dynamic ratio and dynamic cranking up to about 4* advanced and after that the gains drop off.

If I'm correct this cam has a fairly short 48* overlap. With the installed ICL at 106 it shows 62*ICA with a dynamic compression ratio of 7.31 and dyn. cranking at 140.
With it 4* advanced I get dynamic compression of 7.53 and dyn. cranking at 146.

Are these just numbers? or something to take into consideration. I could lose some top end and not miss it. Are there any other down-sides to advancing it 4*????

You need about .050 on the intake and .070 on the exhaust if you are careful. If you drive like a retarded gorilla, add some in, although I've seen guys with .125 on the intakes smack them because they are just criminals in the way they drive.

Checker springs is my least favorite and the least accurate way to measure actual p/v clearance. If you have say .050 on the intake with checker springs, you probably have .020 more than you think.

The best way is with the cam degreed, and using the springs you be running, use clay to measure actual clearance.