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Greg...Modify your 5.7 heads. Glen Knowlton, Joe Mondello, both men, May they RIP, agreed my hand ported G3 Hemi heads were kick azz when I welded the 5.7 up the quensh pads and installed bigger valves. Port velocity/air speed was in the 345 range at mid lift number's. Exh:int ratio's in the mid 70's. You won't see those numbers at mid to high lift with 6.1, Eagle or Apache heads.



Are any particular 5.7 Head better than others?


I am interested to find out why some guys are making excellent power with reworked early 5.7 heads, and the factory is able to do better with the Eagles, 6.1 and Apaches that have less port velocity. Hemidup did a set of early pre 2009 5.7 heads that worked extremely well for him, and out performed supposedly better heads. There is something to be learned here beyond just port velocity and flow numbers.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky