[charlie66]

I'm looking to make more hp with my engine. I'm not sure if where its at now is maxed out or not, With out porting and raising the compression . I will be willing to change the cam if it has to be... and if I did raise the compression and port what would it be worth. With my bore and stroke what is the limit on the cfms of the head that will be still usable?

461ci 4 bolt main (pro Gram) No block fill

Ross Forge flat top pistons 4.155 bore about 11:3 to 1.I still run pump gas...

Eagle H beam rod with L19 bolts

Forged crank 4.25

Edelbrock head cnc ported by Kauffman 334 cfm 75cc closed chamber.

Lifter bore brace.

Bullet roller cam 259/263 660 lift ,on a 110 .

Any help will be very much appreciated ..