I finally got my new 572 B1 motor on the dyno. Made several pulls on 116 Maximal,(5) to 7600, and it made 1034HP at 7200RPM, and 810FP at 6200RPM. Then we put the E85 APD on and made 1 pull, made 75 less HP, and killed the rings. My combo is 4.500x4.500, B1 original heads, 16-1 compression, cam is 286@50Int 296@50Ex, 112 lobe center, 1150 APD dominator gas, 1250 dominator E85. I mix Sonoco 112 with Sonoco Maximal 116 50/50 and add that 10% to 90% pure Ethonol. A/F on E85 was 9.6-1, and gas was 14.50-1.
Any ideas? Engine builder sited excessive detonation.