cylinder compression at altitude

[ak2co]

so i have a 07 rmk 600 that only shows 60 psi both sides. wide open throttle warm. It runs great though, which it shouldnt at 60 psi. If i run it on one cylinder and the tester in the other it gets up to 90 psi. In denver is that normal? my dragon 800 would foul plugs at 90 psi so what gives. i am gonna try another tester tonight. btw its for sale thats why i am testing it 3300.

 

[SD Coyote]

yep

I think you better try another tester! It would not run good at any altitude, with only 60#s compression. I think you'd show at least 110 in the Denver area. I would not run it on one cylinder, while using the tester in the other.

SD

 

[ak2co]

yep

I would not run it on one cylinder, while using the tester in the other.

SD

noted thanks