Cylinder Head Death Match..Indy 440-SR 295 CNC vs. TFS 240

AndyF said
Ok. This is what I needed to hear.. I have been fighting with myself for the past 2 weeks on a new top end combo for my 470. Currently it's 10.5:1 Rpm heads that flow 317 at .650. I have a soild cam from clay Smith .575 with 1.6 rockers. 268 duration. Victor intake prosystems 1000. This is in a 66 Coronet. race weight 3645 4.30 gears and a 3500 stall. All while the car has a 518 trans.this is a street car and plan to keep it that way. Runs to low 11's and mid to low 10' s on the bottle. I want it to run mid 10's on the motor. So my biggest issues is do I swap out the heads for the TFS heads? And which ones? The 240 or 270's? Or SR's?? Or just only do the cam swap to a .620 lift or so soild roller? Any thoughts?

I'd suggest an engineering approach to the problem. Figure out how much power you are making today and then how much additional power do you want to make. Once you know those two numbers the answer becomes easier to find. I've shown a bunch of times how to make 700+ hp with a pump gas 470 using TF 240 heads so just follow what I did and you should be fine. Just for refence, 700 hp in a 3800 lb car will go mid to low 10's depending on how well you can hook it up so the 240 heads should work just fine for you.[/QUOTE]
Thank you for the quick response. I like it. The motor now makes about 550 by itself. My next question is what is your cam spec? You can pm it of you want.