PTV clearance with 5.3 heads??
PTV clearance with 5.3 heads?? I currently have stock ls1 heads on the car and I am about to swap them out for a set of 5.3 heads. Assuming the 5.3's have not been milled, should I have any PTV clearance issues?
You might wanna watch out with that cam. If you had a stock cam you would be fine. Heck I'm even fine with my 224/.581 114 & my 5.3 heads are milled .018 with stock replacement FelPro gaskets.
5.3 heads only have a 1.89 intake valve, as opposed to the stock 2.00 on the LS1. If you put 2.00 stock valves in a 5.3 head you will have .030" less P to V than stock. If you put 2.02 Ferrea valves in it you will have almost .050" less P to V than stock. You better leave it alone.
5.3 heads only have a 1.89 intake valve, as opposed to the stock 2.00 on the LS1. If you put 2.00 stock valves in a 5.3 head you will have .030" less P to V than stock. If you put 2.02 Ferrea valves in it you will have almost .050" less P to V than stock. You better leave it alone.
