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Old 01-16-2013, 07:26 PM
cdminter59 cdminter59 is offline
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DCR Calculation

Originally Posted by thinwhiteduke View Post
I can't figure why it was dumped either, I learn a lot by reading through these posts too.

F'BIRD-88, this is for you in regard to you question in the 'dumped' thread. I sent to you PM also, before I found this one.

My aim was to achieve 11:1 SCR, or real close to it. If my heads were as advertised at 64cc , that's right about where I would be. The combustion chambers in the heads were measured accurately with the correct equipment by me and my machinist at his shop.

The block, a 2 bolter from a '73 Impala, was stock everything when I tore it down. Never had the heads of, factory.

Specs are now,
Bore: 4.030"
Stroke: 3.48"
Piston to Deck Clearance: .005"
Head Gasket bore: 4.060"
Head Gasket Compressed Thickness: .030"
Pistons: KB171-020 hypers with compression distance of 1.561", not rebuilders. Valve reliefs are marginal at 1cc, actually not even 1cc but I called it that. My machinist and I fly cut the pistons to give minimum piston to valve clearance as I was chasing compression.
Head Chambers: 61cc

Let's know what you get.

I hope this is misprint Pistons: KB171-020 hypers. Bore 4.030 anyway the cr. is 11.484.
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