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Originally Posted by PoorMans180SX
There you go again, arguing your opinions as facts.
"93 has no place in racing applications"... Are you just ignoring the fact that 95% of enthusiasts use premium pump gas at track events? Not everyone wants to constantly mix up batches or purchase and transport barrels of high-octane racing fuel for events. It's enough of a PITA to fill up a bunch of E85 canisters the day of the race, as there's rarely a station close to the track that carries it.
There is absolutely increased detonation protection when using E85. If you were to tune a car on pump gas, then fill the tank with E85 and retune for proper air/fuel, the car would make roughly the same power but have loads of safety margin. You might even need a bit more timing to make the same power as on pump. You don't have to take advantage of the additional octane and latent heat of evaporation for power production and use it as a safe zone. Yes of course there is the pros/cons list of more fuel usage and the need for nitrile rubber everywhere etc, but you can't say that it's not a safer fuel to make power with when it comes to actual combustion.
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E85/Alcohol is superior in every aspect to 93 octane gasoline and equally as available. Therefore, gasoline has no place in racing when E85 is available.
This is not an opinion, merely an obvious inference. Only a fool would use gasoline when Ethanol or similar fuel is available.
The same can be said for towing, or any duty application.
Some people like to eat fried chicken and some tan in the sun, but that doesn't mean those things belong on the menu. To someone well versed in biology its pretty obvious when one should avoid certain things, you need to 'see' beyond personal preference for taste and color.
Avoiding sun and fried chicken is a PITA but it might help you live longer.
As to safety margin, a miss is as good as a mile. A clean running gasoline engine is no less safe than a clean running ethanol engine. It makes no difference.
Again, not an opinion. I know of at least two(hundred million) engines that used gasoline for more than 200,000 miles without issue. If you know what you are doing and understand the limitations of the fuel you are using then there is no need for additional safety margin unless you are willing to cope with the additional cost (as many decide to use racing fuel on race days, this happens quite a lot) as a matter of fact