Marcohotrod
Well-Known Member
Here we have 87 89 and 93 pump gas, pumps labeled maximum of 10% ethanol. We like more octane, but to get it I think we are getting more corrosive ethanol? Anyone have any facts on octane vs ethanol content?
If you're looking for a general statement, its probably safe to say that up to a point, ethanol helps (MO+RO)/2 octane. If you go over to NY State and buy premium 0 Eth fuel, you'll find its 91 octane IIRC, definately not 93. My truck pinged merrily up the NY throughway hills on that stuff.Here we have 87 89 and 93 pump gas, pumps labeled maximum of 10% ethanol. We like more octane, but to get it I think we are getting more corrosive ethanol? Anyone have any facts on octane vs ethanol content?
ethanol has half the btu content that gasoline has, so it requires twice as much to go a mile. air has moisture in it, which ethanol sucks up
I was just reading about this today. They say ethanol is around 114 octane, e85 is around 106 octane. It takes around twice as much e85 to equal the same a/f ratio as 100% gas. Guys are also making more power running e85 when tuned properly. I've been out of the hot rod loop for awhile so I'm trying to catch up.
We race with E85....you need about 25 to 30% more E85 then 100% gas...and make more power...
Only thing changed on the car in the switch from gas to e85 is the carb...same steel braided line..same fuel pump...same fuel pumps....
Been racing with it for about 5 yrs now....