Milling TC heads

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Oct 31, 2024 | 08:50 PM

Adam76

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Milling TC heads

Hi,
can anyone please tell me roughly how many thou off the heads 1cc equals?
In other words, if I mill the heads down 2cc (from say stock 85cc to 83cc) how many thou off would that equal?
thanks

Nov 1, 2024 | 04:20 AM

eighteight

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From: OH

.007 off = 1cc

Nov 1, 2024 | 05:59 AM

Adam76

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Quote:

Originally Posted by eighteight

.007 off = 1cc

Thanks

Nov 3, 2024 | 07:48 AM

Sweep'r

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From: CNY

I'd want to have them cc'd to see where you're really at, may need more off of one than the other
...or maybe run a .030" head gasket instead of .045"
...piston depth in the hole vary from cyl. to cyl. ?

Last edited by Sweep'r; Nov 3, 2024 at 07:50 AM.

Nov 5, 2024 | 10:37 PM

Adam76

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Quote:

Originally Posted by Sweep'r

Yes, all valid points to do it properly.
Thanks

Nov 13, 2024 | 06:37 AM

98hotrodfatboy

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Also, if you decrease the overall height of the rocker assemblies by milling the head .014"-.021" plus reducing the head gasket thickness by .015" I would recommend adjustable pushrods..

Nov 13, 2024 | 06:52 PM

Adam76

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Quote:

Originally Posted by 98hotrodfatboy

Also, if you decrease the overall height of the rocker assemblies by milling the head .014"-.021" plus reducing the head gasket thickness by .015" I would recommend adjustable pushrods..

Yes, I would probably use adjustables.... But from what I understand - stock PRs use about .100 of the .200 travel available. So wouldn't an extra .030 / .035 with the stock PRs still be within acceptable limits?