440 source heads

[komninon]

440                                                                                                                                                                                                                                                            j&e sportsman pistons 10-1                                                                                                                                                                                                                            isky cam 280 232 485 108                                                                                                                                                                                                                             performer rpm intake                                                                                                                                                                                                                                     750 holley                                                                                                                                                                                                                                                   the engine was rebuild and i used 100% stock heads. it was dynoed at the machine shop 404hp and 490 torque. the machine shop told me that the problem was the heads and by changing to aluminun heads it will make around 475hp and 525 torque.      what do you think? 440  source heads will make the difference?                                                                  Thank you, George.

[mally69]

well no one has them yet. They have not been released as far as i know..  BUT they are supposed to flow almost exactly like the edelbrock heads do, and if they do then yea i would say you should gain some. I know i am going to get a set from 440 source when they are released.

[rav440]

what do aluminum heads have to do with it ? what are your heads ? what is the valve size ? are they ported ? i guessing you have stock heads with small valves . so yes the 440SOURCE heads will be more bang for the buck than getting machine work done to the iron heads .

[aifilaw]

if your running the stock heads, even with a valve cleanup, and you switched to just the stock edelbricks then you will see the kind of performance they described to you.
The 440source are supposed to be along those lines as well.