I have #48 heads with 1.65 ratio rockers. I believe it is ~10.75 - 1. The detonation i think is from a little bit of low octane fuel (1-2 gallons just to get me to the gas station) i put in because i was afraid to run out of fuel and i was really running it hard through the gears after i filled up with 93 so probably still some low octane crap stuff still in there. I am so pissed off at myself to say the least!
I probably should have all 8 replaced. If you recommend forged, would i then need to change rods too? I have a cast crank so you still think i should go with forged pistons?
