The Std. bore on a 440 is 4.320". So +.030 is 4.350 . What is the deck height on the machined block?
Yes they are aluminum. I was thinking 10:5 is flirting with the current crappy gas quality, although 93 is available around here. Car is cruiser only and only ended up going 512 due to worn out stock internals.
Depends on what block you start with. You can build a 512 with a 400 block bored .035 over, or a 440 block bored .060 over with 4.25 stroke crank. That comes to 4.380. So if you are building with a 440 block, .060 OS pistons will work. Need to know what pistons you have yo calculate C Ratio. Are they the flat top with a dish ?
The calculator is pretty accurate. Plug in your numbers and see what you have. .010 of space works out to about .2 on the static CR. Ideal quench on aluminum heads is .040-.050 with .040 being the better end of the tolerance.
I ran 13 to 1 C Ratio on a 451 stroker, 242 int duration @ .050. At 5400 feet you can do that. Also had to run 50/50 race fuel with premium, (98 octane) , mixture on the rich side, ran the motor cool, (it was more likely to ping when hot) , 38 degrees total advance, 2500 RPM torque converter with low gears in the rear. Don't want to load the motor much at lower RPMs.
