Pulled plugs last night to do a compression test and found this. Compression was 160 160 115 160 and 175 175 135 175 with a cap of oil, so I am thinking some of the plug went out the exhaust valve.
Detonation? Meltdown? The other 3 plugs look normal. When this happened, I was running a measly 22 psi on 92 octane + meth.
Any thoughts?
