I had some detonation going on

[572]

I have always ran C-16 until this summer. Since I wasnt runnin with any NOS an just a division race an one bracket race I thougt I could get by. My motor has 40 runs on it. We always take it apart with that many runs an replace bearings an valve springs. I was mixing 50/50 C-12 & C-16. All the crush was gone on #4 main an workin really hard on #2. Im around 16:1. Just a reminder for anyone thinking of doin what I did. DONT.