Can anyone give me a ballpark figure as to the max horsepower potential of these heads? They have 2.02/1.60 valves, 170cc intake runners, 76cc chambers. They were installed out of the box.Right now they're on a 350(.040 over) with 9 to 1 compression (flat top hyper pistons), a .480 lift/230 deg duration cam, air gap manifold, holley 770 carb, 1 5/8 headers into 2.5 flowmaster exhaust. I'm guessing it's making about 350hp now. The car now runs mid 13's in the 1/4 mile. I'd like to break into the 12's. I think that should be posssible with these heads, but I don't know their power limitations.I don't want to spend a lot on other parts if the heads are the real limiting factor.
naturally aspirated those heads can maybe make 500 horses or so. at least thats what the dyno sim said when i put them on the big cube e-85 motor after i took off the big 230cc port heads.