Re: different way to change fuel/air mix?
i've mixed E-85 with 87 octane before, it makes for a leaner jetting, start with small amounts of e85 and work it up till you get a nice tan plug. methanal is also going to make it leaner, but also draws water into it so you would have to use it up fast. diesel and kerosene are not going to burn well mixed with gas in one of these engines. using a smaller jet is the wisest move, but the e85 mix gives a higher octane, home made race gas if your jetted for it.