Ring Gap Question
Initially, in my 367, I used the .065 ring-factor on my 4.04 KB-167 hypers. For several weeks, I experienced overheating and loc-ups at shutdown, sometimes having to wait more than 20 minutes until the starter could crank it. After trying several starters and what-not, I pulled the engine and;
had the bores honed another .0005, and
opened the top gaps to the .008 factor, and
added .002 to the second rings.
This cured BOTH the overheating and the loc-ups.
After warming up the engine I did a LeakDown Test @the usual 40psi, and found the leakage almost too small to read. So I readjusted the test pressure to 80psi, and still had less than 2% on my gauge. The cranking pressure was over 185psi.
I called it a win-win and never looked back.
Like Rusty says;
