I have a stock 1500 with single port heads.  I want to do a compression test on the cylinders.  My old Harley with 100,000 miles and 9.5:1 compression ratio is putting out 165psi in each cylinder.  What should I expect to see on my stock 1967 motor?  What is considered a good range of values?  I am getting a little bit of smoke out of the 3/4 bank and I want to check compression before I tear things down.  Thanks!

This might be one of those "a$$holes" questions...and what I mean is everyone is gonna have one (answer).

My thoughts would be between 80-120psi. Balance between the cylinders is more important than the actual psi.

Anything less than 100psi means you have troubles. Make sure your valves are adjusted before you test and hold the throttle open while cranking.

brad

thanks for the input!  You guys have helped me lots with gettin' my buggy running right.  Glad I found this website, you guys rock!

stock '67 had 7.5:1 compression if I remember correctly