Quote:
Originally Posted by AndrewCologne
It also depends on the type of the leak down tester. Common Chinese cheap ones work with pressures of about 1 bar for measuring, which results in higher percentage results where these are still within specs.
The higher the pressure for testing the smaller the tolerance window gets. Means with 100 Psi a result of 8% can already mean an almost non acceptable pressure loss.
Those professional Hazet testers i.E. with only one gauge work internally with 4 Bar towards the combustion chamber:
https://nineelevenheaven.wordpress.com/leak-down-tests-on-a-911-sc/ |
That link certainly explains the need to know which variety of tester one is using. In my instance, I had the first version using very low pressure. However, at baseline the right gauge shows no greater than 80% leak down, and so I'm not confident that I trust it fully. I have ordered one similar to the last version described, so I think I have the most flexibility. Stay tuned...