Originally Posted by mopar dave
Pete tells me 13:1 is the sweet spot for these Hemi’s. My plan was 12:1 and I’m now thinking just build it with 13:1 and live with it. I don’t mind mixing fuel as I do it now with my 12.5:1 511 wedge. Looking like CP will be the piston if a can find a shelf piston for this. Once I get the heads I can cc the chambers and intake to get a better idea on the compression and cam.


I doubt you are going to want to run anything less than straight 110 at 13 to 1
I had CP slugs in an old build. Sweet slugs. Very nice. Best did that motor, was very happy with it

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8