Re: [Amc-list] 232 combustion chamber - No Squish

[Tom Jennings <tomj@xxxxxxx>]

Sandwich Maker wrote:

> the '64-7 head was closed chamber, 56cc iirc.  '68-'76, 66cc open.
> '77-'80 [at least], 74cc open.  pistons are different for each; by my
> calc '77-9 slugs actually have 6cc less dish than '68-'76.

Hey! I found that I have a closed-chamber head in my iron pile. It's in 
great shape, casting 3170717. I think it's a 64 head. (And it's got the 
top-end oiling fix; the far rocker bolt is drilled, 1/8" tube brazed in 
the top out through the valve cover for an external oil line.)

Assuming it's a 56cc head, a .030" head gasket, and flat top pistons 
that come up .0845" below the deck, bore x stroke is 3.78 x 3.50... (30 
over)

area= 11.22 sq in
gasket volume = .33 ci
chamber volume 56cc = 3.4 ci


BDC
cyl volume = 39.27 ci (area * 3.5)
total volume= 43.00 ci

TDC
cyl volume = 0.948 ci (area * .0845)
total volume= 4.678 ci

static ratio = 9.19:1


Anyone's opinion: is this too much for a street car on cheap pump gas?
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