Dyno, E85 results.
Everyone is talking about power and knock resistance, and rightfully so, but that is not the whole story. That extra money you think you are saving with E85 goes out the window because you get WAY less MPGs with E. Why? Energy density of gas vs E. If this is a car you put miles on, you will do better with gas until the price hits 2x what E is. E85 has a purpose but don't be confused, saving money ain't it.
As long as E85 is at least 1.00 a gallon cheaper vs the pump fuel you were running before then the cost of operation is cheaper. You lose about 3mpg on full E85...most pump E usually lands around 75-80% in the summer. On a daily driver that can run 87 octane, yea I agree you won't save a dime being the cost difference between the 2 fuels are often less then .60. However if you have to run premium 91-93 octane, it can save a little being 93 often runs 1.50-2.00 a gallon more then E around here. Not all areas of the country are the same either. Imo any performance car that requires at least 91 octane would benefit from running E. It smells better(especially on a cam car with a lot of positive overlap), makes a little more power on some NA setups and a lot more on others, also burns cleaner. I'll take it all day and twice on Sunday over pump gas.
https://www.edmunds.com/fuel-economy...ison-test.html
Exactamundo! Total power under the curve while accelerating, once for each gear, factoring in traction, 60', and shift times gets you close. It's even more complicated than that AND you have to factor in the type of racing to be super thorough but that is why you'll hear the experienced guys say "area under the curve". Best single phrase to keep you focused. It's also why for years big blocks rated at 200hp could beat small blocks and turbo 4s with 300hp...
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Damnit you beat me to it. For years I've laughed at guys on here doing all these mods and then asking about gas mileage. Yeh I know it's their daily driver. Well then if gas mileage is such a concern get a different daily driver. You can spend $2500 on heads and cam but can't spend $1000 on a beater car to drive back and forth to work. Give me a break.
Everyone is talking about power and knock resistance, and rightfully so, but that is not the whole story. That extra money you think you are saving with E85 goes out the window because you get WAY less MPGs with E. Why? Energy density of gas vs E. If this is a car you put miles on, you will do better with gas until the price hits 2x what E is. E85 has a purpose but don't be confused, saving money ain't it.
Engine has been in the car 12 yrs. Has around 13,000 miles on it. It's just a toy.