Compression Test

[Shift_450R]

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]

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]

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]

i think its around 125 to 128 might want to check a service manual or call a dealer and ask