I'd hate to call it one way or the other. Your pistons are down the hole a bit, so it may be of no help at all, but then again... -- Mark Price Morgantown, WV 1969 AMC Rambler, 4.0L, EFI, T-5 2004 Grand Cherokee Laredo, 4.7L, Quadratrc II " Chronic Pain Hurts" -------------- Original message ---------------------- From: 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? > _______________________________________________ > Amc-list mailing list > Amc-list@xxxxxxxxxxxx > http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list