| | Dry compression test outside of car
A local seller has a 2000 LS1 for sale that I am interested in. It is currently sitting on an engine stand, and has since he bought it (receipt says 6/2009). He bought it from a Corvette parts business and the receipt shows he paid for a 01' Camaro engine with 67k miles. I checked it out and it has 241 heads and a pre-01 LS1 intake manifold which leads me to believe it is a 2000 model year. Since the place that he bought it from lied that it was from a 2001 car, I can't trust the mileage that they gave him.
I want to do a compression test to see what kind wear and tear is on this engine. My question is, since the motor has been sitting for likely over a year without any oil, is it a bad idea to turn it over? I was thinking of getting the engine on a hoist and putting the flywheel on, then jumping the starter terminals with a spare battery. Would it cause any damage to the bearings/hydraulic lifters/oil pump to do this for a short amount of time, having sat for this long and having no oil in the pan?
And what compression numbers would a strong motor produce?