E85 tune... is it worth it?

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E85 is 100% worth it if you have it in your area. It is particularly beneficial to those with boosted applications as the detonation protection is quite a bit better with the extra heat. I wouldn't hesitate to throw E85 even on a bolt on car however as Coyote cars do respond well to it. If you have any questions about tuning or E85/octane, feel free to shoot me a message anytime. We are having some sales right now for Black Friday and you wouldn't find a better time to jump on the E85 train. Lethalperformance.com

 

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Just tuned mine for 93 and then loaded the flex tune. E85 is better and I would do it again no question.
 

ChitownStang

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Just tuned mine for 93 and then loaded the flex tune. E85 is better and I would do it again no question.
That’s great to hear! Who’s tunes did you go with?
 

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cahouston

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The e85 tune has been a blast so far. The low end increases have made traction a challenge (275/40r19 Nitto 555r2) but the smile factor at WOT is significant! I'm hoping to shoot for 11.0XX next month at a local track event.

I had it on the Dyno today.

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Racinjason65

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I'm not looking for more performance and I don't drive a lot... 2500 miles a year. But E85 is $1.50 a gallon cheaper than premium. So, I'm wondering if it's worth the expense to swap over? I have heard it just requires a tune, but that seems a little too easy.
All you need to run E85 is a tune, and there is a good performance increase but there are a couple drawbacks that you should be aware of. First, you’ll get about 30% less miles per gallon, starting the engine when it’s cold out can take a few more seconds of cranking and you stated that you only drive about 2.5k miles per year, e85 absorbs moisture out of the air and doesn’t store as long as gasoline, so if your car sits for weeks at a time or has the same fuel in it for several weeks at a time, e85 may not be the best choice for you.
 

K4fxd

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Check out the latest edition of engine masters. They tested E85 (errr E70 and E 50 and E14) on a LS engine.

Interesting to say the least and matches what I have found on the drag strip with my 17 GT.
 

RagmopInKona

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I meant paying $5 a gallon for gas is a ripoff. Your tuner module appears to be on back order.
You are driving a convert. and at 79y/o most likely not going after every last ouch of power out of it.
E85 you'll save a little at the pump. but at 2500 miles a year, you are not saving much. After paying for the tune.
You are also going to take a hit on resale. As the buyer pool looking at a convert. is not going to buy the swap to e85 was to save 10 bucks a tank , they are going to like it or not, hear, modd'd mustang that = road hard and put away wet.
Other thing to think about is can you get the fuel everywhere you roam?
Will you be driving it enough that the ethanol doesn't evap. and that e85 is e70 left in the tank.
If you were putting 8k+ on it a year, and it was a given that pump gas was going to stay high. I could see it. but at about 125-130 gallons of fuel per year(2500~20mpg highway/city combined). you are not saving much.
 

Golgo69

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All you need to run E85 is a tune, and there is a good performance increase but there are a couple drawbacks that you should be aware of. First, you’ll get about 30% less miles per gallon, starting the engine when it’s cold out can take a few more seconds of cranking and you stated that you only drive about 2.5k miles per year, e85 absorbs moisture out of the air and doesn’t store as long as gasoline, so if your car sits for weeks at a time or has the same fuel in it for several weeks at a time, e85 may not be the best choice for you.
well said. I have two tunes so I don't have to deal with the winter headaches of long starts and everything else. My BULLITT is a "sometimes weekend car".
 

ChitownStang

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I just loaded the Livernois 93 tune on my Mach 1 last week and I have the flex ready to try but I may just wait till next year if it’s that big of a pain in the cold.
Had no idea
Probably best as I couldn’t hook up any more power on the cold pavement… lol
 

Golgo69

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I just loaded the Livernois 93 tune on my Mach 1 last week and I have the flex ready to try but I may just wait till next year if it’s that big of a pain in the cold.
Had no idea
Probably best as I couldn’t hook up any more power on the cold pavement… lol
Same here. Just switched from E85 tune to 93 octane for the winter.
 

Livernois Motorsports

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I just loaded the Livernois 93 tune on my Mach 1 last week and I have the flex ready to try but I may just wait till next year if it’s that big of a pain in the cold.
Had no idea
Probably best as I couldn’t hook up any more power on the cold pavement… lol
We have people here in mi run the flex tune year round and have not had issues with it running or starting, id says to run it, but you'll never wanna go back to 93 after you try ethanol!
 

K4fxd

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but you'll never wanna go back to 93 after you try ethanol!
Only if it is readily available. We lost 3 pumps close to me and now it is not worth the 20 min drive to get it. Also this last pump is labeled "Flex" where the others were labeled "E85"
 

Livernois Motorsports

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Only if it is readily available. We lost 3 pumps close to me and now it is not worth the 20 min drive to get it. Also this last pump is labeled "Flex" where the others were labeled "E85"
We are a little spoiled up here in MI, almost every station near me has a flex fuel pump and they usually stay around the e 70-e80 range. The cool thing about our tune is it's a true Flex tune so you can fill it up and not have to think about it.
 

 
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