Nitromethane, but you don't really want to go there, you'll likely break a lot of parts. You could convert to run alcohol, but you need to build the engine to take advantage of it, then your stuck always using it.
alot of 2 stroke guys use nitro around here. i dont know how to use it. some guys use polypropolene and some (long time ago) ran liquid ether to, but both of those are pretty nasty chemicals and need special foam additives in water to put them out when they are on fire....
For the same reason it makes more power: increased cylinder pressure. Nitromethane is a rocket fuel that is only marginally suitable for piston engines. On top of that, people who experiment with it often do not properly richen the mixture, so the engine runs lean and gets nuked.
Methanol is much harder to ignite than gasoline and burns at a much slower rate. Methanol also burns cooler, releasing its energy at one-fifth the rate of gasoline.
You produce more power because you are burning more fuel, CH3OH(Methanol) is ran at a much richer mixture 5:1 or 6:1 by weight.
Methanol has approximately 9,500 BTU/lb.
Gasoline has approximately 18,400 BTU/lb.
Nitromethane has an energy content of 5,000 BTU/lb.
But we put a lot more Methanol to the engine than gasoline.
And the ratio of Nitromethane is 1.7:1 therefore we are putting that much more fuel to the engine again.
A little nitromethane poured in your gasoline should not show any improvement in performance.
I would like to clear a few things up; methanol has a higher flame speed than gasoline and a lower ignition input energy, so technically it is easier to ignite with a spark, at least at stoich mixtures. It does have a lower flame temperature, but it is only marginally lower than gasoline. The big deal is that methanol has a higher octane rating which means it is harder to make autoignite(ping, "detonate") from heat and compression alone. Also, the latent heat of vaporization is high which is responsible for the significant cooling effect on the induction system. The flash point is only ~55°F whereas gasoline contains compounds that flash from anywhere around -40 to 400+°F. This has more to do with cold starting than anything.
As far as adding nitro to methanol, that is how it's usually done. I don't know what proportions are "safe" vs. most rewarding, but I do recall that the risk increases on a much steeper curve than the benefits...
This web site will explain what you are looking for, however you may want to proceed is up to you. It doesn't mention about oil enhancers(nitro) but that is another way to make power. You can make some power with additives and a stock motor but it is limited somewhat. If it didn't work why would we have fuel checks at the races?
Nitromethane brings it's own oxygen to the party. This allows you to not depend, totally, on the carb supplying all the air. Perfect for applications where the carb is a limiting factor. I have experimented with nitro....I don't think it is a good idea to run more than about 10% in these engines. A lot more variables come in to play when you start running nitro, too.
That Prop Oxide is some really bad stuff for you and the others around breathing it.. nitromethane is as well, produces nitric acid and that will stop someone from breathing easily.. please be careful about using this kind of stuff to "go faster".. there are better, safer ways..
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I have done several seats for people and they all come back saying man that ----- is fast now what did you do to it?
When I was a young gaffer I tried all kinds of things in fuel. My Dad usualy noted the changes in the lawn and quality of the cut.
Much swearing and slaps behind the head would follow when the mower developed a problem, the grass died or patches of poorly cut grass indicated I was running through the deap stuff trying to aply some load.
There realy is no replacement for displacement I discovered and never added any fuel enhancers opting for larger engines......
Dear old Dad introduced me to armor all on the seats of snow machines as way keeping nags from coming back complaining there sleds weren't as fast as they used to be.
Nitromethane is one of those things in this day and age I just don't think its wise to buy unless you are a serious racer and have someplace secure to store it.
Its like amonia nitrate, a very useful product to a farmer but in the wrong hands its trouble and I would be concerned what happens if it got into stupid ( not just the wrong ) and the liability to the purcahser for injury or damage.
You can say that about a lot of things these days, guns, cars, pointy sticks, hell people get sued for burning themselves with a hot cup of coffee.
Nitromethane. This increases power, measured at the engine shaft, in proportion to the percentage used, limited by mechanical considerations such as compression ratio, rate of fuel flow possible in existing system.
If the engine is on the maximum compression ratio usable with race gas, this ratio will have to be dropped by a figure of one ratio if 10 percent additive used, and by half a ratio if 5 percent additive is decided upon.
With regard to the fuel flow the jet diameter will have to be increased by a figure of 1.125 for use with 10 percent, and in proportion less for the 5 percent.
