Winter Project - Intake Valve Upgrade

[Paul Workman]

Originally Posted by Jagdpanzer

Working the heads over this winter installing a larger intake valve package I work out with Ferrea. Stock 39 mm intakes valves, seats, and springs to be replaced with 41.8mm stainless steel valves, springs and titanium retainers.Though 16% larger in area the Ferrea valve, locks and retainer weigh 8 grams less than the stock pieces. This setup is designed to work with a set 0.500" lift cams being made. Right now I plan to leave the stock exhaust valve setup more or less as is.








new valves in mock-up head

Juuuust lookin' at your combustion chambers, Phil. Looks too like a bit of relief applied to the chamber wall adjacent to the intake valves, AND the quench area looks to be reduced a bit as well. Did you do the porting? If not, who did (if I may ask)?

Looking familiar... (I did my own porting w/ advice and guidance fm the "FBI" gurus)