Quote Originally Posted by mooneye777
thanks for the reply Dave, the kit says it checks it all. And I was for sure going to have to know how to tell what was what. (Oh wait Houston we have a problem). Thanks also Dave, we have the dual unit posted.
I've found a good, tight engine will come in at 5% or less leakdown....I test mine at 90PSI. We have zero gap 2nd rings in both the drag cars, they stay at around 1% to 2%.....

Another test I do is to crank the regulator down to about 20 psi and pull the piston from BDC to TDC in the normal rotation direction and see if there are any bad spots in the cylinder..... Sometimes will indicate an area in the cylinder that maybe the hone isn't quite right, or perhaps a bit out of round....... Heck, I've even used the leak down tester with a bunch of plugs and plates to pressure test a block or heads (Cigarette smoke works great as a leak detector when things are pressurized with air)...Also with a few fittings it works great to leak check all the lines and fittings on the car before they have fluids in them....When you're setting valves, a leak down tester will let you know when the other valve is open.... Heck, be creative with it!!!!!!! Lots of uses and procedures besides just what it was designed for!!!!

Probably not a lot of that stuff in the instruction sheet either, just some things I've tried and actually had work!!!!!