Cylinder Head CC?

[BanditSVO]

I have a 60 cc chamber head, if I mill the head .023 off how many cc's will my chambers drop?

[blueboss]

Opinions vary. One states: For every .005" machined, deduct 1cc from the volume. Yet another states: For every .010" machined, deduct 1.5-2.0cc. So, based on this, you're looking at anywhere from a 3cc to a 5cc drop for a final head cc of somewhere between 55 and 57cc's.

[svono50]

Here is a sure-fire way to calculate how much you will drop:

Measured cc's prior to milling - measured cc's after milling = drop in cc's

Sorry for being a little bit of a smarta#!, but with the shape of a curved combustion chamber it is hard to really be sure how much you loose when milling a head without direct measurement. Any estimate is just that, an estimate.

[svono50]

BEWARE THE MENISCUS!!!

[Boport]

Mike that's an interesting method, so simple but hadn't thought of that before- Thanks for the tip.

We see about .007" per cc with an iron or esslinger aluminum head chamber. We will use this formula to rough cut the deck to within .010" of our calculated target and then cc the chamber while in the milling machine to check volume and stop there or continue to mill as necessary. With that being said you should be right at 57cc's if you measured 60 to start with. Good luck,

Bo

[BanditSVO]

Mike that's an interesting method, so simple but hadn't thought of that before- Thanks for the tip.

We see about .007" per cc with an iron or esslinger aluminum head chamber. We will use this formula to rough cut the deck to within .010" of our calculated target and then cc the chamber while in the milling machine to check volume and stop there or continue to mill as necessary. With that being said you should be right at 57cc's if you measured 60 to start with. Good luck,

Bo

It's one of your ported stage 3 heads. It got warped due to engine overheating so they had to cut .010 off to make it flat agian.

[Pat_in_L.A.]

How dare you encourage the voices in Mike's head!

Now he will be on "Criminal Minds" again.