csk: Exactly ! Thats why i thought we had lost tension on a ring. This engine has the pistons out of the hole over ten thou , had just made a 7k pass and i figured we got a little extra piston rock up top and cracked/broke a ring.
I figured a cold compression test would show a hole down 30-40 lbs - was shocked when that wasn't the case.
Of course im tickled pink we don't have to pull the engine out with only 3 points races to go.