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Originally Posted by bcredliner
Race only cars that use ethanol have the capability to adjust the amount of fuel to match the ethanol variation or for temperature/humidity. The same is true of their fuel delivery systems and ignition systems. Due to the cost it is rare that is the case of a street racer.
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bc, it is still unbelievable to me, that the E85 piggyback ECM, and the BMW DME, are functioning as stated in your quote. My E53’s fuel trims, and timing are running in real time, not Alpha N. I can run 87 octane gasoline - 110 octane ethanol. Whatever I pump into her, she will run it! With 87, 89, and 93 the Meth better be flowing! I’ve run 87 with Meth, and as long as you’re not pedal to the metal, you can get by. So far with the current ambient temps and humidity, I have been able to disable the chemical cooling. But, we will see how that goes when the Texas heat hits.
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Even though almost any engine can run E85 if other changes are made it is certainly not necessary or effective or a cost saving for most.
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As a necessity, I’ll leave that to one’s interpretation. It’s effectiveness, definitely a success, and I believe N/A and Forced Induction will deliver positive results. As far as cost saving, I filled her today with a few gallons of fresh E85. The cost, $2.09. Had I filled her with Shell V-Power, which is my fuel of choice. It would have cost me $3.25. The system is already paying for itself.