View Full Version : Compression Test
Shift_450R
06-18-2006, 11:04 AM
im gonna do a compression test on my 400 to see if i have a valve leaking. What is the stock compression, i know its 9.1:1 but i need how much compression in psi. Thanks
hotrodbelair
06-18-2006, 12:31 PM
on mine stock compression i think it was between 115 and 120. but that was a while ago not realy sure if thats it.
Shift_450R
06-18-2006, 12:31 PM
Originally posted by hotrodbelair
on mine stock compression i think it was between 115 and 120. but that was a while ago not realy sure if thats it.
alright thanks
stupidhurts400
06-18-2006, 09:56 PM
i think its around 125 to 128 might want to check a service manual or call a dealer and ask
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