skywalker73
New Member
I ran #8 plug this evening. It ran good. I only ran it for about 15 minutes, but gave it everything I had. The plug looked good without signs of detonation, and the head didn't feel quite as hot. I tried to run a compression check when it was still hot, but the wife and kid caused it to cool down completely. lol I did manage to get a cold reading of 105-110 psi. I squirted a little oil down the cyl and tried again. Still around 105 psi. I'm wondering how much the pressure will increase when its hot? I will try again when I have more time.