I have been running my EVO on E-85 for over a year now without problems, and will be doing the same with the spyder after I have all the modifications installed.

Main requirements to run E-85 are a very high flow fuel system since it takes 25% to 30% higher fuel flow for the same amount of air compared to strait gasoline, and an air fuel tuning method to adjust fuel flow without adverse effects on your timing curve.

Keith

 

:stupid:


covered it right there. all you gotta do is tune for it. larger injectors/pump and a way to control timing

 

I had a thread on this about 6 months ago, really never got any answers.

 

(sorry for getting a little offtopic) I haven't gotten to run it in the winter, but I just noticed it gets harder to start as it gets colder. They're switching to E70 on the 1st, so after the 6th I'm going back to my pumpgas map.

 

Well, after the 1st it will get easier to start again! That is basicly what I was telling you to do on your own, by adding more gasoline to the mix it makes the blend easier to start in cold climet conditions.

Keith

 

how much is it a gallon. also what is the point if you use 30% more fuel. thier went your gas mileage.

 

You can boost more because of the higher Octane level and cooler a/f charge.

Premium unleaded in Denver $3.19
E85 Denver $2.09

 

so do I have to modify anything in the car besides fuel pump and injectors to run E85 on my VR4?

 

ive heard you also have to reinforce older fuel systems as it eats out the fuel lines easier and stuff? but i hope not. youll get slightly less good mpg too right?

id love to run e85 with my cars... but i dont have the supporting EMS to do so >.<

 

some say that because of most unleaded running 10% ethanol, most fuel systems are safe for e85. The gas in e85 helps keep your fuel system from drying out. True, it will be harder on components, but most should last the life of the car. I also read that you should change your fuel filter with in a few weeks, because of sludge in the tank coming loose. I guess it's like running system cleaner all the time.
There are fuel system additives clamming that they help coat the fuel system for protection also.

 

So it'd be possible to run E85 just by upgrading the fuel system to larger injectors and high flow pump/lines, and adding a fuel controller?

 

what if not to upgrade? just for daily normal driving? or on highway?

 

So What would be better? Switching to E85 or staying with 91+Methanol to run higher Boost? How much more Octane is the E85?

 

E85 is 100 to 105 Octane and you can pull it right out of the pump.
Today it's still $2.09 in Denver. Whats the price for the 91+Methanol option?

 

ive been running e85 since 2004, no fuel related problems so far.

 

did you do any modifications to your car?

 

Just FYI- it is alot harsher on the fuel filter and it'll blacken the oil sooner.

 

where are you all getting E85? i dont think anyone around here sells it..

 

Local co-op found it through: http://e85vehicles.com/e85-stations.htm

 

I know you said that it should be safe on our cars because our fuel is 10 already... but what about my car, its 15 years old? About how much more boost can you run with everything else being stock besides the injectors, fuel pump, and afc?

 

but what about my car, its 15 years old? About how much more boost can you run with everything else being stock besides the injectors, fuel pump, and afc?

Your car can run on E85 perfectly fine, providing you have enough fuel pump/injector to provide the needed fuel. Ideally, I'd recommend a fuel controller that could control timing, unlike your SAFC.

As for how much more boost you could run it will vary car by car depending on modifications, but if you open up your exhaust by getting a downpipe/testpipe and gutting pre-cats you should be able to max out your current setup... then it is time to look into a better fuel controller, bigger IC's, and a larger turbo setup.

Think of it like this. Running E85 is like running 110 race gas. You can safely run significantly more boost without worrying about detonation.

 

before I moved to europe I ran a 4:1 mix of 91/E85 for a good 2 years

that bumped up the octane enough to run 20psi on DSM 13g's and DSM SMIC's without knock, my fuel mods were 580cc injectors and a hotwired walbro

I also dynoed 343hp/356tq at 18psi, the car had WAY more left in it, long story short (24 bent valves ) I didn't have time to get it tuned very well before going to the dyno so I stayed fairly conservative

 

also the DSM shop that was near me when I lived in oklahoma made 650hp on straight E85 in a 1g DSM, and I think 575 on the 4:1 mix

it's good to see 3si finally starting to come around to E85, I remember when I first heard about it and started using it, everyone said I was going to damage my car and it wouldn't work and that it wasn't worth it, even though there were tons of people on other platforms (DSM's specifically) before me that used it no problem and saw huge benefits

 

oh one more thing, check out www.e85fuel.com they have a listing of all the stations around the country that sell it

 

You won't be able to run e-85 on the stock set up. You will need larger injectors and fuel pump.

I am currently running ~30% ethanol mix (3gal 110/2gal e-85) and my IDCs hit the high 90's.

I ran e-20 (20%,91 octane) to the NG this year and did a few pulls on the way and had no knock up to 18psi.

 

So in order to run E85 I have to have more fuel delivery? even if I won't race on it? just for normal everyday driving. and mixing 93 octane fuel and E85 is perfectly normal, correct?

 

E-85 conversion kit: http://www.change2e85.com/servlet/StoreFront

I have blended an E-20 mixture for over a year on my SL with no problems.
It's 93 octane and I pay less than regular 87 octane prices.

I may buy the kit but mileage will drop at least 5 mpg.

 

The kit looks like it's just a box that plugs in between the ECU and the injectors to lengthen the injector pulse. Unfortunately the stock fuel system will not be able to keep up with the fuel demand. You would still need a bigger pump and injectors.

 

A guy here just finished swapping over to e85 in his na-t supra. He is very happy. No more race gas

 

I've run e85 for a while now, with great results.... Yes, cold wether (CO) sux, and it's harder to start, but you can't have your cake and eat it too!!

That's just one of the characteristics of alcohol, it doesn't vaporize in the cold very well. So I crank a little longer....I can deal with that for the added boost. I also have a customers evo and an employee running it on his honda.

Cost wise, it's really nothing. You pay ~30% less, but you use ~30% more.

You do need something to tune it, I use AEM, but for whatever the mixture of e-85 vs 91 (or 93,104,110) you have to use a different tune. If you tune for 100% e85 then delude the mix with 91 you're going to be running rich, and may have too much timing for the lessened octane. Or if you tune for a 50/50 mix, and then run 100% you'll run too lean.

The way the stock "flex-fuel" vehicles get away with it is by giving the O2 feedback a quicker response time and more discression over the control. Since the O2's really read in "lambda" they're after a specific voltage, reguardless of the fuel type used.

This being said, depending on your system, and the controll alotted to the O2FB, you can very the mixtures without any problems. Stock ecu's usually have a +/- 20% discression. But if you stay close or past that 20% it will trip a CEL for rich/lean bank1/2 code...

UPP

 

not a single station has it in LA... amazing...