Quote:
Originally Posted by wnta1ss
Have to disagree with you here, remember that this car was tested with bolt-ons only, not a forced induction car. Seems to me that LT1 bolt-on reports are typically more like 20~25 hp gained on E85 over using 93 gas.
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I have been helping my tuner on his dyno days during the Covid crisis - have seen him pull 50FtLbs out of a dozen or so N/A LT1 cars the last few weeks from an optimized pump gas to optimized E85 tune.
When asking him about the very subject because it is pretty consistent regardless if the engine had mods or not, his theory was that it was based on displacement. If the intake or cams were changed, it may gain a little more or less, but was within a couple of percent.
There is no such thing as good or bad E85, it is just the level of ethanol content. And unless it is boosted, E60 will get you the same power as E85
What my tuner does is has the cars show up with 1/8 tank of premium - he dials in the gas map, they pour in 10 gallons of measured E85 and it lands right on E70. He runs the car under load until the flex sensor maxes out on the E content, and then tunes E85.
This time of year he does 12-14 cars a day, three days a week, and 3/4 of them are on E85