swift700

iTrader: (3)

Could someone please tell me how many cc's difference there would be between a head gasket of .051/4.030 vs .051/4.060? I'm working on my exact compression ratio for my build and need this info. Thanks.

Rick_Vor

iTrader: (36)

Only 0.16cc difference.

Use this compression calculator to play around with your build.

http://www.kb-silvolite.com/calc.php?action=comp

For example if I used my 6.0l build specs, going from a 4.030 to a 4.060 HG drops the compression 0.016 points (9.510 to 9.494.

Rick

swift700

iTrader: (3)

Thanks. I'm trying to do a 370 build using 62cc heads and am trying to get the compression ratio down to around 9.5:1 but am not having much luck. I've tried different compression ratio calculators and get a lot of different numbers. What components are you using? Head size?

Rick_Vor

iTrader: (36)

I built a 6.0l 4.005 hone with Wiseco K444x05 11cc dish pistons, Lunati ProMod rods (used but re-sized), stock crank and a new iron block. The pistons ended up being .004 in the hole so I'm a 9.5 compression with a 65cc AFR 225 heads and .053/4.100 HG.

Rick

swift700

iTrader: (3)

OK thanks, using 4.030 bore, 6.100 rods and .051/4.060 gasket, 11cc dish pistons I get 9.4:1 or so but the pistons are .019 in the hole. Do you think this is too far down?

Alternatively I can go with 6.125 rods and get .006 in the hole but the comp ratio would be 9.95:1.

A third option is to go with -25cc pistons, 6.125 rods, .040 gasket and get the pistons .010 out of the hole and an 8.95:1 ratio.

What would be the best of the three?

MARK3406E

Might help if you were more specific about your over all goals. All of those would work for differant situations.

swift700

iTrader: (3)

I'm building a high-torque engine for towing but would like a reliable truck that's fun on the street. A sleeper, of sorts.

budhayes3

iTrader: (19)

If you're staying NA I'd get as much compression out of it that I can...I like the 9.95:1 of the three listed...