My question concerns my compression check. With an average compression of only 140 psi, does this indicate a lower comp ratio?
This engine has less than 1000 miles on it. No oil consumption.
I have 113 heads that are milled, with the biggest valves we could get in them. Valves came from a 400ci Pontiac. .040 pistons were flat tops, cast and oversize .040

I did not check to see how far down the hole they were.

The engine is a 312. In my Ford manual it shows comp of 160psi and police 150psi, due to lower comp ratio.

Just curious, as the engine runs great! Impresses me and my friends.

Jim

  Jim Rowe Elkhorn, NE