head milling

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Jan 22, 2008 | 08:34 PM

Zigroid

Thread Starter

Registered User

Joined: Feb 2004

Posts: 948

From: Stroudsburg, PA

head milling

angle mill or flat mill?

edit:
after searching more seems flat mill is the way to go. I was worried about the intake manifold being off then found this thread:
https://www.camaroz28.com/forums/sho...d.php?t=422677

Quote:

With my heads being milled and using Mr. Gasket head gaskets , I have taken off 0.035 off the heads.

Using the Forumla out of "How to rebuild Small- Block Chevy lt1-lt4 engines" by Mike Mavrigian

I mulitply 0.035 X 1.2 = 0.042 off the intake sides

and 0.035 X 1.7 = 0.595 off the bottom of the intake

MY QUESTION!!!

Do i take .021 off each side of the intake or do i take .042 off each side of the intake???

is that (amount milled off head) * (1.2) = (amount to mill off intake sides)
and
(amount milled off head) * (1.7) = (amount to mill off bottom of intake)
?

CURRENTLY I have a stock block, not decked, .026" thick headgaskets (.021" thinner than stock) and stock heads. the machine shop said the heads need a slight mill to clean them up. I figured if they're getting a slight mill I might as well take a little bit more off to bump the compression ratio a tad more. even if I decide not to it will still be a little more taken off. if its .003" off that puts my total difference from stock to .024". does that mean...
.024" * 1.2 = .0288" off intake sides
.024" * 1.7 = .0408" off bottom of intake

is this correct?

has anyone tested this?

I know I can do the exact math (mostly trigonometry) to figure out what needs to be done but it would be much more convenient if the formula holds true!

Last edited by Zigroid; Jan 22, 2008 at 09:27 PM.