Way back in the '70s we put a 429 in an F350 for a trailer pulling rig. The engine was originally built for a stationary industrial application where it ran at a constant rpm. We had a severe detonation problem and finally cured it by adding a water injection system. I'm not saying it raised the octane level, but it obviously slowed the combustion rate or it wouldn't have cured the knock. BTW, this truck had tons of torque and not too bad on fuel mileage.
:ford:
well since "octane rating" is measured by comparing the detonation resistance to pure octane, anything in the "fuel" that raises the detonation resistance raises the "octane rating"
