Building a 120r with 12:1 has anybody used e85 to tune these bikes yet?
Live here in Chicago e85 is everywhere both of my race cars are tuned and run on it but haven't seen to much info on motorcycles?

 

I'm actually in the process of doing an e85 setup on my turbo car. I don't see why it would be any different on a motorcycle. As long as you have a fuel pump that can push enough fuel and big enough injectors.

 

I know a bunch of guys doing it and have done it to sport quads. Naturally carb mods to deliver fuel needed which is near twice the amount for gas. Theyare adding a/f ratio gauges to monitor and keep in the 13 range. I see no issue especially with fuel injection.

One good thing is the motor will run as cool as a cucumber and you can add much timing. Down side would be more frequent oil changes due to water in oil due caused by cold running motor. Remember e 85 is not much different than alky motors used in racing apps. Same rules apply

 

I got a question for you E85 users wana be's. If you use more fuel, do you get more mileage from a gallon? You only have a 6 gal tank, so running E85 it would be like a 4 gal tank.

Kinda defeats the purpose and driving up food prices's at the same time if you ask me.

 

I'm assuming most e85 wannabes as you stated are looking for more power, not fuel mileage.

 

Is this a street bike? I'm assuming no at a12 to 1. What's the corrected compression ratio? You will need gobs of fuel.

At that compression, you can choose from a lot of race fuels.

I realize e85 is cheap, but I believe race fuel will give you just as good results as e85.

I've had impressive numbers using vp u4.4 fuel in my street bike hot rod engine. 10.9 to 1 compression. It made an impressive power increase across the entire rpm range on the Dyno.

I think e85 will work, you'll prob have a fare share of tuning, time and money to get it correct. Good luck

 

I've been tuning e85 turbo cars for a couple years now, probly done about 40 of them. e85 is like magic candy for turbo motors. Spools turbos and keeps exhaust temps cool. Like some others mentioned you will need roughly 30% more fuel delivery.
You can start out adding about 5* to your whole base timing map as e85 burns much slower than pump gas. Careful when tuning as it's very easy to go past mbt because it is very resistant to knock. you can run very high compression and keep your motor happy happy on e85. 12:1 compression should not be a problem. Also note for the track there are some other ethanol blends like c85, e98, FTW ect...

 

Upped my carb'd evo from the stock 8.5:1 to 10:1 after getting ahold of 11:1's proved difficult (read: impossible, I ordered the 11:1's from like 5 different places that said they had them in stock, but turns out they did not). I just recently made the switch from 91 here to E85 and the benefits are outstanding. They truly are, exhaust has dropped 100*F, and power has gone up. Jets went from 42/160 for 91 to 52/180 for E85, and the bike GOES. I mean it SCREAMS and it doesn't cook your nuts when sitting in traffic anywhere near as bad as gas. I just did a ride up to my parents house and back, did approx 67 miles and filled up approx 1.72 gallons when I got back, and I was doing 75-80 on the highway here which sucks down the gas on my 5 speed and I still got 38.9MPG which would translate to about 50MPG if it was 91 octane. I am using the same spark curve I was for 91 and so far have no issues.

 

Very interesting....I would like to learn more.... Subscribed.....

 

So you guys are saying I can change my jets to run e85 in my evo and.... only lose a few miles per gallon. Run cooler. And buy cheaper fuel?

I also need to know more about this..... I'm assuming you have to bump up stock compression, not sure what she is now but not stock. What is minimum compression needed? Also assuming you can still run high octane pump gas through it too if in a pinch.