E85 tune needed?

[murick]

You've bought perfectly good car, why do you think you need to do anything with it ? How often do you use all the power to put inconvenience of having to deal with E85 on yourself ?
Test it or worried what percent ethanol was at the pump ? Having 2/3rds of the range of the regular gas ?

Whether you need to tune is the question you only can answer but in 99.9% of cases the answer is always no. Never need, always a want. And it will absolutely void your powertrain warranty.

(and for the record - I have E85 tuned car)

I wonder if the OP question is actually even needed? Are there cars which can take both the regular gas and E85 without any mod to them?

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[kz]

I wonder if the OP question is actually even needed? Are there cars which can take both the regular gas and E85 without any mod to them?

All the flex fuel ones, including bazilion F150s with the very same engine Mustangs have (5.0)
Mustang does need a tune though (and some need fuel system mods), it's a lot of money to spend for little more torque and power but using those argument renders entire mod industry not needed

 

[AWESOMO 4000]

All the flex fuel ones, including bazilion F150s with the very same engine Mustangs have (5.0)
Mustang does need a tune though (and some need fuel system mods), it's a lot of money to spend for little more torque and power but using those argument renders entire mod industry not needed

This is incorrect. NO fuel system modifications are needed to run E85 on a 18+ Mustang at all. Flex Fuel tune only or a dedicated E85 tune.

My 19 Bullitt was trapping 118mph in 2600ft DA on all-season tires and a Livernois Flex Fuel tune, learned to E77. That's 120mph+ on a cool fall day. Stock they trap 113-115mph on 93 octane. Great bang for the buck for $699.

E85 is a great benefit to these cars. 108 octane in a 12:1 compression 7700rpm V8 is a good thing. Unparalleled knock resistance and slight cooling benefit. Just don't use it when its 20° out.

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