kitdelsol

I want to use e85 con my car on the next tune, but I need to know your experience using e85.

Any upgrades on the fuel pump or fuel lines

theidealone

i have a friend running it in his prelude. h22, t67, 15 psi, 532 whp. a1000 pump, 1600cc precisions. he maxed out his walbro 255 and 1000cc RCs at 524whp @ 14psi. tuned on AEM EMS.

kitdelsol

Thanks for the reply, does he make any upgrade on fuel lines or pump

I´ll upgrade my 660cc injectors for a 1000cc , my goal is to reach close to 360-380whp on e85 and stock sleeves,
but I have been searching, and some poeple say that e85 is very corrosive, and this is my big concern.

txdohczc

from my experience it is corrosive it ate the rubber off my work boots so i can only imagine what it does to fuel lines after prolong usage, but there are people who run e85 on here and love it. there is a few threads about it here just search e85

N1ghtM0nkey

I've been searching around for E-85 information as well. What I've found out is that while it is corrosive, you can use it on a mostly stock honda fuel system. Obviously you need to be able to tune it, and you need to be capable of delivering significantly more (to the tune of 30%) fuel to your engine. Hopefully you've already got a good fuel management system set up on your car, just upgrade and work with that. Apparently the stock honda fuel tanks are made from steel so there's nothing to worry about there.

As far as the actual tuning goes, what I read mentioned that you have to tune for a different AFR than with gasoline and something about lambda - it's been awhile since I read up on it.

Also keep in mind that there are two different blends you can get - summer and winter blend. Supposedly certain cars have issues with hard starting on E-85, so during the winter months they use a 70% mix instead of 85%. Best thing to do here is to call the gas station you get your fuel from and figure out what blend they use, and when they use it so that you know exactly what is going into your tank.

Keep in mind that I have no experience tuning vehicles on E-85, and limited tuning experience period. There was actually a good thread on E-85 in the honda-tech forced induction forum. We'll say it's a diamond in the rough, and don't ask me how I found it.

Bone1

even the E85 "summer" blends are varying by 7-8 numbers.

When they do dump in the E70 into the tank, what do you end up with......

a big ------- guess!

theidealone

ethanol really isnt all that corrosive (methanol is. methanol will even corrode metals). its been said that ethanol will harden rubber lines, but that you shouldnt have to worry about that unless your car was produced pre-80s. another reason they mix it with gasoline, is due to the fact that it has certain additives and lubricants in it, to help the fuel system. just about everyone out here in colorado is using it. all of the imports i know running it, only upgraded pressure regulator, pump, and injectors, and tuned it. yes, theyve said to use the ethanol setting on your wideband, and tune in lambda. cant remember, but i think 1.00 is stoich, and i think .75 is around 10:1? but not sure. you could look it up though. as far as winter blends, and summer blends, ive read that, and then been told my mechanics that its full of ----. so i dont know. but considering youre running more fuel than you would with gasoline, and you go to mix in more gasoline with the ethanol (say its a 70% mixture instead of 85%), then youd just be running a bit rich. ive also been told that the gas stations and companies HAVE to keep the mixture within 3-4 digits on the ratio, another reason why i cant see that a gas station could sell e70 as e85. you could always stock up on a barrel for the winter, if it would last you.

aero

It does vary based on season. I've experienced the difference in tune caused by it. The time that it changes depends on the area of the country that you live in. It would be nice to find a chart that showed the time it occurs.

j3w

f-5 tiger?

kitdelsol

Thanks for your responses