ACRx7-85

What's the normal compression range for the 12a engine per rotor? If I would get a compression test on the rotors - what is the safe range?

Thanks

zyounker

Well, if you take it to a dealer they use a special machine.. If you do it with a normal compression gauge you will need to take out the one way valve. I think it is called a schnieder valve?

On a normal compression tester you should see 3 even bounces.. it is more important that they are even then their #..

But they should be 75+psi to be considered good. I have seen motors run in the 60s before fine..


Also there should be little difference between the front and rear rotor.. like a few psi max..


-Zach

hanman

It is a schrader valve. You can just hold it in, you don't have to remove it. ditto on the rest.