dyno #s seem low ?
Results are from a chassis dyno so numbers are at the wheels, Max rpm pulled to 5700rpm. Pistons are speed pro forged .30 over and cam specs are duration 226/234, 110 lobe separation, lift .494 intake .513 exhaust.
Roger. Looks like you have about 9.1:1 static CR now with your parts, and a 7.4 dynamic CR. Going to 65 cc heads would get you to 9.8:1 SCR and 8.0 DCR; those numbers would be good to go with. (And I am assuming you have the standard FelPro head gasket with .053 compressed thickness. It might be thinner.)
The Edelbrock Performer AL head choices are the 65 cc open chamber or 63 cc closed chamber ones. The 65 cc ones have the open area milled in the head to accomodate your pistons up out of the deck and you could go for a thinner head gasket and more SCR and DCR; you would be around 10.1 SCR and 8.2 DCR with those heads and the .039" thick head gasket. I personally would not push past that, and maybe back off to the 9.8/8.0 SCR/DCR with the thicker head gasket since you won't have quench with that head.
Or the RHS heads would flow good too; I'd get the 2.02" vavles. Being iron, I'd stick with the lower SCR/DCR combo. With your Speed Pro forged pistons being up out of the deck, you need to keep the .053" head gasket thickness with these closed chamber heads. (Unless the block was decked much; in that case you may need a thicker head gasket to keep the pistons away from the heads.) But you would have a decent quench gap.
Either head will flow better, and the flow and better CR will push your torque and HP up. Maybe a 50-60 HP increase at the wheels with no special porting added to the Edelbrocks, and similar for the RHS/2.02" valves.
All depends if you want to spend the $$ for more and what yo want to do with the car. I am assuming a street driven, pump gas car on all the above. Hence the 'no 11:1' CR thinking.... Besides, you'd have to go with 58 cc heads to get even close to 11:1 unless you changed to domed pistons. And then you are moving out of pump-gas-land unless you cam up, and rev up, and there go the street manners out the window.
If too much info, just ignore! LOL
