|10-08-2003 07:30 AM|
|joe28boxer||thanx everyone im gonna try the heads then ....guess i can run pump gas to........thanx all|
|10-08-2003 04:53 AM|
Hey pozz, did you figure the cr, or someone else? Sounds kinda low to me, even with .020 deck height?
|10-08-2003 02:18 AM|
|jimfulco||76cc heads on a flat-top 350 gets 8.9 or 9:1 if you use 1.56" height pistons. Shorter "rebuilder" pistons will get you ~8.5.|
|10-07-2003 08:26 PM|
|RedRocket||With proper quench height and milled heads you can get about 9.5:1. You can do the math yourself with this calculator|
|10-07-2003 08:13 PM|
|pozz33||Change the heads or install domed pistons. My 350 , flat top and 62cc chambers is about 9.5-1|
|10-07-2003 07:44 PM|
|Robinson Robin||I would guess low 8:1 factory it was probably rated at about 8.2:1 or so with dish pistion but the factory rating was usually overly optomistic.Also keep in mind that most pistons in rebuild kits have a slightly lower deck height because many of their sales are to big engine builders who deck all their blocks. If you get the heads milled that will help raise it.|
|10-07-2003 07:36 PM|
will compression be too low????
im hoping to get about 9-10 to 1 compression with flattop pistons on a 350 chevy bored 30 and use 76cc heads.....or will it be lower???