LS1 heads are 66.67cc with 2.00 and 1.55 valves
5.3L truck heads 61.15cc with 1.89 and 1.55 valves
Sounds like the 5.3 head would be better with a little bigger intake valve.
LS1 heads are 66.67cc with 2.00 and 1.55 valves
5.3L truck heads 61.15cc with 1.89 and 1.55 valves
Sounds like the 5.3 head would be better with a little bigger intake valve.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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