E85 for 2 strokes
Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan
-
ChrisK
- On the main road
- Posts: 121
- Joined: Mon Nov 25, 2013 1:16 pm
- Country: Australia
- Suzuki 2-Strokes: T250, GS550, TL1000S, T500 race, GSXR400 race
- Location: Perth, Western Australia
E85 for 2 strokes
Has anyone done a conversion to run E85 fuel in a 2 stroke carbureted motor? I'm interested in what had to be done jet wise and whether the motor ran perceptibly cooler? If this was in a race situation, so much the better.
-
Barry S.
- To the on ramp
- Posts: 444
- Joined: Mon Oct 20, 2008 5:31 am
- Location: Killen Alabama, USA
-
ConnerVT
- Novice racer
- Posts: 963
- Joined: Wed Jan 18, 2012 8:01 pm
- Country: USA
- Suzuki 2-Strokes: T500R (now), T500M (40 yrs ago)
- Location: North of Albany, NY
Re: E85 for 2 strokes
Bottom of this link discusses E85. -- http://www.klemmvintage.com/gasolines.htm
-
tz375
- Moto GP
- Posts: 6210
- Joined: Mon Nov 03, 2008 10:47 am
- Location: Illinois
Re: E85 for 2 strokes
Methanol for some reason doesn't seem to be as beneficial in 2 strokes as it is in 4 strokes according to racers I know that used it back in the day. On our 4 strokes we had to open up the pilot jet, went with an AMAL Z profile on the needles and used main jets that flow approx 230% of stock.
Ethanol is similar to methanol in terms of needing a much lower A:F and it seems reasonable to expect E85 to need somewhat less in of a change. We could work it out by checking the upper and lower heating values and density of ethanol and methanol and make an educated guess. Get it right and the engine will run cooler than on gas. Err on the rich side and leave it a little rich and you should be OK.
Ethanol is similar to methanol in terms of needing a much lower A:F and it seems reasonable to expect E85 to need somewhat less in of a change. We could work it out by checking the upper and lower heating values and density of ethanol and methanol and make an educated guess. Get it right and the engine will run cooler than on gas. Err on the rich side and leave it a little rich and you should be OK.
