360-1 Indy 245 cnc heads

pittsburghracer said
Again all I am going to say about exhaust flow numbers is what Darren Morgan told me years ago. He said don’t concentrate on flow numbers and worry about the speed of air exiting the port. He stressed shaping the port (bell shaped) and making the exit flange as big as the header would allow. I wouldn’t even try to use his thinking the way these heads were cnc’d. To much metal already removed for my liking. Heck I can hit his recommended number (325 plus FPS) on a Speedmaster Head.

The Indy heads generally won't perform as good as the flow numbers suggest...they can be made to flow more air past .700 and then flatten out. The problem is the short turn, you can't widen it enough or shape it correctly without hitting water. If they changed that (and made the area between the intake and ex. bowl solid like most aluminum heads) they would make much better power per cfm.