I had them milled for 8cc, I should have gone 10 or 12, or should've done alot of things like use those 2.5 rods.. That's the beauty though, always learning. It's a good strong runner. There's no comparison to the old 170. I've got no regrets at all. There's always next time I didn't check lavron's math looking back on his thread when he came up with 12.863cc. 1.417"R .276"H is 1.74 cu inches or 28.51349 cc's. It doesn't really matter imo unless you have to use off the shelf pistons. It's like that other Hoosier said, pmuller9, custom pistons.
Those 28cc's pistons may be good for a lower duration street cam or a turbo 250 build, if they'll hold up. I know nothing about turbo builds other than lower compression and a good head gasket seal.
They'll put you at 8.6 scr/7.3 dcr with that cam @ 4*, zero deck, those rods, 54cc chambers and a .045" gasket. Or 8.8/7.45 with a fomoco composite .032" gasket. With the Felpro gasket and 48cc's it top's out at just over 9.1/7.7, maximum ~9.4/7.9 w/ .032" gasket and that cam.
Even with a 248/256 110 advanced 4 degrees you'd only be @ ~9.15/8.1 w/ a .045" gasket and zero deck. I'm sure it would be reliable and sh*t and get right now but you'd be leaving a lot of power on the table I bet.
Those 28cc's pistons may be good for a lower duration street cam or a turbo 250 build, if they'll hold up. I know nothing about turbo builds other than lower compression and a good head gasket seal.
They'll put you at 8.6 scr/7.3 dcr with that cam @ 4*, zero deck, those rods, 54cc chambers and a .045" gasket. Or 8.8/7.45 with a fomoco composite .032" gasket. With the Felpro gasket and 48cc's it top's out at just over 9.1/7.7, maximum ~9.4/7.9 w/ .032" gasket and that cam.
Even with a 248/256 110 advanced 4 degrees you'd only be @ ~9.15/8.1 w/ a .045" gasket and zero deck. I'm sure it would be reliable and sh*t and get right now but you'd be leaving a lot of power on the table I bet.