grocery getter
Famous Member
jamyers":24q1og9j said:I disagree. On a cold engine with unseated rings, as long as you have compression I wouldn't worry. (Heck, I've seen an engine run with barely over 40 psi average.) And you don't want them all to be equal, it's an indication of a leak. Get it running, get the rings seated, then check the compression when warmed up. Anything before that isn't going to tell you very much. IMHO.grocery getter":24q1og9j said:that's a lot of compression loss for rings not being broke in, on a bored and properly honed engine.
think about it, they're not equal....
something else is not quite right......
Again, there's likely more than one problem here.
What i'm trying to get across is with these static compression numbers you'd see alot of blowby. on the 65 psi cylinder you'd be looking at 50% of the A/F going to the crankase.
I get the weak numbers on break in, but these are a little extreme.
like most of the posts so far I agree timing is an issue. i'll stand by my thoughts that 65 psi on a new bored and honed cylinder is very weak
(and there's more than one problem).
Three things We can't dispute....Air/fuel,compression and ignition