Well, this leads to an interesting question.
In the gasoline classes at Bonneville, we're limited in choices to these three ERC products.
R + M / 2 method
A-19A 119
110-K 110.3
MUL/B 101 (unleaded)
http://www.ercracingfuels.com/sxs1.htmIn the "Grenade", we ran the A-19A, despite the fact that we were only at 13.2 CR.
Realistically, seeing what most guys run in road racing events with somewhat higher compression ratios in their BMC engines, the 110-K would likely have been fine at Bonneville.
We tested on a chemically similar fuel to the A-19, C-14, which is made by VP. The octane was similar, as well as the specific gravity. I wanted to keep SG constant between the dyno and Bonneville to remove the variable, because we were running a carburetor, rather than EFI, and were making adjustments on the salt.
So the questions are as follows -
Can a denser fuel compensate for lack of anti-knock properties?
Is it possible to over-octane a combination?
Higher octane usually equates to a slower burning fuel, so is it possible that a less complete burn occurs with a higher octane fuel than a lower octane brethren?