raycan2

I checked the compression on the # 1 spark plug and read a 119 is that good?

TVLynn

What motor ? Cam ? Not great. How long has it been since run

raycan2

Yea its a 440 with a pretty hot cam as what 4-5 mechanics have told me...I do not know what size but I did a compression test on all 8 and running the lowest 119 to 121.....I just dont know if thats good or not and what would be the ratio.

PK1

Search this forum for compression testing. It has been explained in good detail.

Were all the plugs out with the throttle blade pinned open and fuel shut off?

TVLynn

The good thing is they are all about the same. The cam probably makes up the difference in the reading..