Originally Posted by wmeabates
Zip,Somehow I got the idea Your 434 was going to be 18 deg.Senoir moment I guess.You would need a pretty good 18 head to be 60 cfm better than the heads you have,I think.But you could probably do one for the same money as any small block that needs shaft rockers.I did An 18 for my car last year 412 inch 4.155x3.800 6.125 rod&434 pistons.83 Camaro stock body with cage,stock suspension 3400 lbs with me,best 60-1.36 1/8-6.23/110 1/4 9.81/138. 10 in.slick open ex. Still tunning Bill.
The flow charts i have on the heads, show 314 cfm flow @ .600 lift, i don't have the engine in the car yet, but i'm running a .734 lift 4/7 swap cam wit 106 ctr's, installed @ 102. I actually talked to Brodix yesterday to see if my Lemon headers would bolt up to 18 degree heads, they told me yes that they both have a 55 degree angle on the exh ports but would be about 1/8 higher, they also informed me that they have 1 program that's getting 370 cfm flow on their 18 degree heads and would probably give me an additional 75 to 100 HP over the 10's. I mentioned other people that say they're getting over 400 cfm, he said i've tested those peoples heads and said i think they got souped up flow machines, because he hasn't seen it yet. But i'm stuck for this season with what i have, just hoping to get into the 5's @ 3250 lbs on alcohol. The car has been 1.39 60 ft. with the 377" motor, but normally 1.42/1.44's and 6.52/10.59@125mph. It's backhalfed 4 link with 14X32 GY's.
Zip.