Certainly, that is the reason why people are trying to push the envelope with mixed fuels. To find that answer.Ok. Brainstorming:
- (theoretically) optimal combustion occurs at 14.7:1. We (as gasoline users) run heavier ratios for higher loads and acceleration only up to low-mid 11's:1. The additional gasoline fuel is used to keep the chambers awash with fuel to pull heat out of it (a chamber coolant)
- This is effective only to a certain point as at that point either the IAT's or the temperatures driven during the compression stroke can equal and/or exceed the auto-ignition temperature of that gasoline fuel, causing pre-ignition knock
- Replacing that extra amount of gasoline, being used as a defacto (and piss-poor I might add) chamber coolant, with alcohol plus some to run an even richer target AFR, depending upon the ratio of gasoline that's removed and then replaced with alcohol, is what enables the ability to run higher loads. The million dollar question is, "how much load in terms of boost can be run given the chosen ratio of gasoline to alcohol"?
But the variables are immense. Pump gas in one town could be so much different than the pump gas in another town. So, one fella finally comes up with the answer for his particular circumstance, passes his tuneup onto someone across the country, and that other person blows his stuff up. Each tuneup will end up being very unique. Even seasonal, the way pump gas is changed from winter to summer.