Quote:

Quote:

The guy who restored my car used 6 pack rods and cast TRW pistons. When I pulled a head off I found the pistons to be about .170 (that's one hundred-seventy thousandths) below deck. That, combined with the 906 open chambered heads gave me a whopping 7.5 to 1 CR more or less. I guess he wanted to make sure it would run on regular!



the ironic thing is even with that low compression it would still be prone to detonate because of the huge cylinder, chamber, and total lack of quench. i had an 8:1 440 that pinged like a mutha because of pistons in the hole and open chamber heads. now it's a 496 with closed chamber heads, 10.33:1, pistons .002 out o' the hole, and no detonation. ever. me thinks quench is more important than compression ratio.