Milling 243's
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From: Ashland, KY
Milling 243's I have some Livernois heads coming. How far should they be milled to reach 59cc? I'm thinking .030, but then heard many different figures on how much milling removes 1cc.
You'd need to mill .03815 or ~.038.
64.45(stock 243 casting cc)-59=5.45
5.45*.007=.03815
https://ls1tech.com/forums/showpost....2&postcount=41
That's a lot of milling. Be careful of PTV clearance especially with aftermarket valves.
64.45(stock 243 casting cc)-59=5.45
5.45*.007=.03815
https://ls1tech.com/forums/showpost....2&postcount=41
That's a lot of milling. Be careful of PTV clearance especially with aftermarket valves.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by Xtnct00WS6
You'd need to mill .03815 or ~.038.
64.45(stock 243 casting cc)-59=5.45
5.45*.007=.03815
https://ls1tech.com/forums/showpost....2&postcount=41
That's a lot of milling. Be careful of PTV clearance especially with aftermarket valves.
64.45(stock 243 casting cc)-59=5.45
5.45*.007=.03815
https://ls1tech.com/forums/showpost....2&postcount=41
That's a lot of milling. Be careful of PTV clearance especially with aftermarket valves.
243 is like a .006 mill
Livernois will be at 64 cc
So 64-59= 5 cc
5x .006= ~.030 mill
(which makes sense, I milled my 5.3 heads .025 and ended up with a 59.83 cc)
