Quote:
Originally Posted by oldman
Pretty surprising, I assume it was 6800 RPM. I'd be more worried about the stock rod bolts to be honest.
Anyway here is the comp cam master chart:
https://www.compcams.com/valve-spring-chart
glancing through the 1.8" height 7228 part number conical would have at 1.2" (.600 lift) of 399 lbs is the lightest conical I saw. |
Anyone know if anyone has checked the rod bolts in a high rpm engine? After seeing the 7100 extreme limit. The GMPP LT535 tune also has a WOT PE equivalence ratio of 1.08 at peak torque and 1.05 at peak HP. That's a 13.4 AFR for E10 gas or 13.98 for E0 gas. Sometimes I think there was some kind of flash error when this GMPP tune was read, its hard to believe, but I am a big believer that people overly freak out about WOT enrichment, I bet if I did the math to find the heat capacity and absorobtion potential of 5% extra fuel I bet I would find its only worth a few HP.
It makes me feel a lot better about my Johnson 2110/Pac Dual springs/ and thicker pushrods being safe on my valvetrain knowing that GM (or at least GMPP engineers) tuned it that way.