ok heres the story. i have 241 heads. getting fully ported keeping the stock valve sizes.by a friend(graduate of SAM school) and i have a thunder racing TRAK cam
EXACT SPECS:

duration @ .050
intake 233 exhaust 236
valve lift with 1.7 rockers intake .644 exhaust .597
LSA 111.5

is there some sort of formula i can use to figure out how much i can safely mill the heads. i was hoping for .030 on these heads??? so i need help!!!

 

Not really. To many variables. Valve job will help you. If you don't mill them, you should be OK. But if you do, the intake valve will need to be verfied. It would be close.

 

BUMP we need more info

 

why do you wanna mill the heads ? to raise the CR or just to make sure they are nice and flat ?

 

compression gain. if i wanted to get it flat i would just go .005 or .010

 

Bump!!!!