ryanleiker

iTrader: (2)

I'm looking for some realistic numbers of highway gas mileage for a turbo lq4 on e85 with a 4l80e.

Chime in whatever you get with your combo. I'm trying to see if my dreams really can come true.

itsslow98

iTrader: (18)

This has my interest as well. Im netting over 26mpg on the highway now with a 93+meth setup. Id love to do e85 but dont know if I can commit to the crappy mileage even when im putting around town out of boost.

westtexasbuff

iTrader: (40)

I'll let you know in about a week

Although, I'm not too worried about it since I got a 25 gallon fuel cell.

skinnies

iTrader: (33)

A lot depends on the combo and tune, my ltd with a glide, 2.73 gears, 5.3/76mm will get over 20mpg cruising on the highway at 70mph. The mustang when it was a 347, bigger cam, twin 6766's would only get 14.5mpg, we couldn't lean it out as much as the ltd during cruise, it just didn't like it. If you got a smaller cam, you should be able to run lean during cruising on e85.

Ryans99ls1

iTrader: (16)

On my road trips i make an effort to stay out of boost, its extremely hard though. The one time i made it all 3 hours without any boost and i got 19-20mpg. As soon as i start putting my foot in it a few times, it gets closer to 10..

RedRocketZ28

iTrader: (19)

The best I have ever gotten was 13.5 mpg. That was driving it to the track and back where I only made two passes. Usually I am in the 10-11 range.

GMCtrk

iTrader: (23)

8 mpg, but at 5000 lbs and damn thing gets in boost very easily (475/83 on a 10.5:1 6.0)

DBRODS

iTrader: (1)

I get 15-16 if I stay out of boost. But with how I drive most of the time its always 11-12. 28 gallon cell definitely helps.

CameronVic

iTrader: (5)

I got 13-14 on a 150 mile round trip cruise with 3 quarter passes at the track, and some thrashing on the way there and back. That was with 3.08s, and a TH400, not 80e. I'd love OD and a locking converter, I just don't wanna change anything, add any more weight, spend any more money, etc. LOL.

evo462

iTrader: (27)

Same here...mix of city and highway and not getting in the boost TOO much I usually net around 13.

big reg

iTrader: (28)

In my old twin screw cobra I got a max of 155 miles per tank mostly highway and no full throttle. I would stick to 93 and lots of meth. I like to drive my cars.

ryanleiker

iTrader: (2)

These are all really insightful. Thank you. Keep them coming.

blackonblacksls

iTrader: (1)

9mpg average in my 5th gen camaro

15ish in my Vette.

Slow94Formula

iTrader: (18)

Usually around 11.5 for me. One 200 mile round trip with only a few times getting into boost I got 13...

HexenLord

Most people foolishly don't tune E85 for economy. With its added octane, you can lean it out and bump up the timing at cruise enough to compensate most of the mileage normally lost by switching to E85. In this respect, mileage lost compared to 93 will be less than 10%.

Torqueshaft

Hexenlord...

So what afr and timing do you run for "cruise" economy on e85..?

SSpeeDEMONSS

e85 has popped into my head a few times for my possible build but i didn't think mileage would be great at all. 3.73 and 80e in a '00 2500 that weighs somewhere between 6-7000lbs. anything over the 12-13mpg it gets now would be fine, just nothing less.

Garrett

Kory 88Iroc Lt1

iTrader: (7)

I'm interested in this as well. There seem to be more stations around my area that have it now.
Kory

blackonblacksls

iTrader: (1)

Id be willing to bed all the guys claiming you won't loose mileage haven't had or tuned an e85 car.

Also no matter what you do at cruise, who the **** is cruising around 100% of the time.

E85 will give **** mileage compared to gasoline.

End of story. Done. No argument. No other side of the story.

blackonblacksls

iTrader: (1)

You don't have an e85 car I would bet