1969 Race Dart w/ 426 Hemi- garaged for 45+ years

Fred68 said

I didn't comment here to hijack his restoration. I just wanted an answer as to how that cr was achieved. There numerous ways to get it and I was curious about 12-1 pistons coming out to 10.93 cr. My 3 engines are all over the place from 426 w/9-1, 426 w/10-1/4 or about and 478 w/10.92 using mopar .030 9-1/2 pistons.

but I will say more about local stories later on.

Click to expand...

No, there’s only one way to calculate static compression ratio. Sean is capable of doing such. As a career machinist, I’m sure he has this well in hand.

There ARE several ways to get the compression ratio you want, this is easy enough and a snap to figure out and even more so for Sean. He told you what the compression ratio was. With your claimed experience, you should have never problem figuring this out. Seems to me pushing the issue beyond the answer much is just trolling.