Soyer

iTrader: (7)

Anyone ever use mx racing fuel? A lot of local guys run it but can't find any info on it

Roelof

For mixing fuel just go to a drugstore and order one of these:



I have a 1 liter version and it is good to mix fuels accurate in small and larger amounts.

NitroVein

I guess we all have different experiences, I used them and didn't like them, a scale is more convenient and repeatable for me.
I do use them for mixing 2 stroke gas though.

RCTecher12

iTrader: (1)

In a race environment, it would make perfect sense to use a fresh jug of fuel. Eliminates a few variables anyway - or the idea is to anyway. In the event of a bad jug of fuel - well, you’ll find a new variable I guess.

RCTecher12

iTrader: (1)

That’s usually what I find. A small tweak is usually all that’s needed. We have a bigger climate swing here where I live, so morning to afternoon may require 1/16-1/8 turn on the main needle. The idle needle doesn’t usually need adjustment unless the ambient air is dramatically different than the last time the engine ran. I don’t typically need to adjust the needle from one can (batch) of fuel to the next unless I change the fuel’s composition.

I use a scale for blending fuel - I weigh a given volume of each component before blending fuel to ensure accuracy. My basement is a consistent 65F and 25% RH, so I typically get the same component weight. I use a spreadsheet I made for doing all of the calculations for me including the fuel’s cost.

RCTecher12

iTrader: (1)

I don’t like to mix all of the components together in one container and then transfer to another. Less exposure to moisture by blending in one container and less work moving from one container to another. This is the beauty of using a scale. Add component 1, zero scale. Add component 2, zero scale, etc.

UrabusDenis

Excellent fuel, I use 16% for GT and 25% in buggy. I rate it as highly as Runnertime. I've tried many brands and Runnertime and Maxima are the best. Maxima is cheaper and locally available, so that's my choice

NitroVein

There can be some difference depending on the oil package on how the engine reacts to climate changes, but it depends mostly on how you want it to tune from the start.

There shouldn't be any big differences between batches of oil, so going just by weight is usually safer and more accurate, but sure you could always try a sample to see that everything is where it should be.
Well I guess it's two ways you can do it, spreadsheet or metric system.

It depends on what fuel I'm mixing, some get more consistent when you blend them in a certain order, some don't.
You can flush a container with some fresh methanol to make sure there isn't any unnecessary moisture too. I'm usually more concerned of exposing myself to methanol, then exposing it temporarily. But I do agree that it's best to keep it to an absolute minimum.

RCTecher12

iTrader: (1)

I usually only check the weight of the components if the ambient temp changes more than a couple degrees. The fluctuation in volume over a few degrees difference is very little. I do it seasonally just to check that it’s the same as it was the previous season. Nothing crazy or dramatic.

NitroVein

Using weight will make sure there isn't any percentage differences due to temperature, the volume changes, not the weight.
But as I said, different batches can be checked.

RCTecher12

iTrader: (1)

That’s what I meant. I’ll edit my post to reflect what I was thinking and not what I typed.

stanleyw808

Hello Roelof,

You should try to find the Class A Measuring Cylinder from Chemical Supplies Store, it will give You more accurate reading with tighter tolerance division gratings.

But the weighing method seems to better I think..

Cheers..

RMKinWI

iTrader: (15)

I have used Byron's Fuel w/11% oil for 10+ years.

Mixing your own fuel - really?? Good luck with that!! I got into RC cars for the racing and relaxation. Its bad enough with the car maintenance, tire gluing, cleaning, fixing, charging, setups, painting, travel, etc. I'll let the professionals mix the fuel and buy it from them. Than I'll spend the time saved running the fuel.

While your mixing your RC fuel - you might as well mix your paint, glue, grease, thread locker, milk, soda, energy drink, gasoline, etc.

Sorry - I don't get it, to each his own, I guess.

RCTecher12

iTrader: (1)

It takes less than 5 minutes to mix a gallon of fuel - and that’s if I have to change all of the data in my spreadsheet to tell me what the fuel mix needs to be on the scale. As I said before, if you haven’t tried it, you should try it before knocking it.

Along the way, you learn a few things. Like how well nitromethane works for cleaning things - it’s a good glue & paint remover. After all, nitromethane is used as part of a cleaning solvent in dry cleaning among other things. Castor oil makes fantastic soap. Etc.

It’s a hobby, fellas. Everyone does it differently.

Cardiak

iTrader: (1)

I'm going to need some gallons of 30/11 from you soon.