need help with dynamic compression ratio
He wasn't going to use .050" figure - KB Silvolite's calculator recommends using that figure plus 15 degrees rather than advertised seat timing. It gives DCR on the high side in most cases, especially if you're using an Edelbrock grind! :toothy7:
Well, mate, I must have misread where he stated:
"Only number i'm not sure of is this,
intake Closing Point (degrees)ABDC @ 0.050 lift plus 15 degrees using a comp cams xe275hl, any help would be appreciated."
Run your number both ways. , and then verify it once you install the cam.
I'll ask the question I asked yesterday:
Are you running a split pattern cam ?
If no, then you only need to plug in the mfgs advertised duration (not at .050) and the mfgs lobe seperation angle. That's it.
If the cam is a dual pattern then you default to the intake valve closing angle and any advance or retard of the cam measured in CRANK degrees. Therefore, if a cam has 7.5 degrees advance/retard built into it, the number you would use is 15 degree.
And, yes, I've read the cam specs...
I hope this helps.
Southernman