Helps identify worn piston rings or cylinder head. For use on most petrol engines

Anytime you build a performance motor and for some unknown reason, it isn't running right or is blowing smoke out of the tailpipe, then something is obviously wrong that needs immediate attention. The first step to tracking down your problem, would most likely be a compression test and a leak down test to determine the source of the problem.

A compression test will tell if you are low on compression in any of your cylinders. There are many potential problems that can cause low compression. For example, you could have a bent valve, or bad compression rings. You could have a hole in your piston or broken ring lands. All of which should require immediate attention before further damage is incurred.

This should have a compression test result of around 200psi. Combined, the cylinders should not vary more than +/- 20psi. In this test, we will compare a high compression NA motor with 11.6:1cr against a low compression turbo motor at 9:1cr.