[Schurkey]

Huh?

Plug the leakdown tester into your cylinder. You have your leakdown numbers in two seconds, not two minutes. The readings probably stay stable as long as the tool is connected. ALL cylinders leak air, new, old, rebuilt. They ALL leak. What is acceptable for indicated leakage depends on the ACTUAL cylinder leakage, plus the construction of the tester...which I tried to warn you about earlier.

I think you're doing SOMETHING(s) very wrong. Starting with not calibrating your expectations with a known-good engine of similar bore size; or a Master Orifice. After that, I'm thinking you need to read the instructions that came with your testing equipment.

Provide a link to the leakdown tester you bought.