Badrooster
Member
....on using Methanol.
Learned the draining tip the hard way on my micro stuff. Gotta get my carbs rebuilt now. The fire extinguisher is a good point that many karters over look.Keep a fire extinguisher with contents to put out methanol fires in your trailer/garage....when it burns nearly impossible to see visually....store it in the very best air tight containers....it can contaminate easy if you don't and can be cause for it not to pass a fuel test....drain your carb and fuel lines flush with gas/marvel mystery oil after you're done racing for the night, the methanol will corrode the inside of the carb and dry out/crack seals/gaskets/fuel line if you leave it sit for any length of time without doing so...
Fuel flow will need to be about double of gasoline, so just calculate the area of the jet and double it. That should get you started. The simplest way to figure that is just square your jet diameter, double that, and take the square root.
In other words... let's say the diameter of the main jet is .040" (I'm just picking a number out of thin air). So just square 40. (40 x 40 = 1600). Then double that (1600 x 2 = 3200), and then take the square root of that (square root of 3200 is about 56.5). So you need a jet around .056" or .057" to get you started.
A quarter inch fuel line is more than 20 times the area of a .055" jet. .05 versus .002..
Now the question is , if the passage is bigger then the jet ? Is there a need too increase it ?
Keep a fire extinguisher with contents to put out methanol fires in your trailer/garage....when it burns nearly impossible to see visually....store it in the very best air tight containers....it can contaminate easy if you don't and can be cause for it not to pass a fuel test....drain your carb and fuel lines flush with gas/marvel mystery oil after you're done racing for the night, the methanol will corrode the inside of the carb and dry out/crack seals/gaskets/fuel line if you leave it sit for any length of time without doing so.