317 heads
#2
FormerVendor
iTrader: (18)
That's going to be a good amount of milling. Coming from 72cc to 59cc. Ballpark .006-.007 per cc that is going to be .090". I don't know that you'll be able to get that far without messing up the geometry. I have seen heads milled .050+ without a problem but .090 is a lot. You would probably be better off looking for a different piston or starting with a LS6 heads (64cc). Just food for thought.
Jon
Jon
Jon
Jon
#3
TECH Fanatic
iTrader: (1)
You won't be able to go that far, at most you don't wan to mill more than .030 off the deck if you thinking of going with any type of FI the head won't hold it. Now N/A you can and I have seen people go as far as .045 - .050 but anything further than that you are messing with the structural make up of the deck. Anything can happen and it won't be pretty.
#7
ik i could get my hands on a set of 241s by tm. do you think its worth me picking up them and having my engine builder port and mill them to 59cc? how much could these heads flow and would it be benefitial to my 383 build? trying to get my car done in a week so trying to do this in a hurry.
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#8
TECH Fanatic
iTrader: (1)
ik i could get my hands on a set of 241s by tm. do you think its worth me picking up them and having my engine builder port and mill them to 59cc? how much could these heads flow and would it be benefitial to my 383 build? trying to get my car done in a week so trying to do this in a hurry.
before i forget see if you can pick up a set of light weight valves (ls6), it will give you great stability in the upper RPM range specially after 6500 rpm. also stick with the stock rockers they will give you the best valve train geometry.
Last edited by 02*C5; 07-30-2010 at 12:10 AM.