Runing Methanol

[marT350T]

I am considering running my drag car on methanol next year but . The engine is a 468 BBC on carbs, so I know I will have to rejet the carb but what else will I have to do ?

[TheEnd]

methanol injection, or pure methanol?

if pure, you might need to change fuel lines and the tank (if it's still a plastic tank)

[stevieturbo]

Everything in the fuel system will need to cope with the corrosive properties of methanol.

Some rubbers and aluminium wont like prolonged use ( system can be flushed after for storage though )

Fuel system will need to have a good 50%+ of the capacity of normal fuel. May need better ignition system too.
And to make the most, get the compression up too.

Then you'll need to source a methanol capable wideband unit.

[marT350T]

Running methanol instead of petrol as a fuel.

Fuel pump can deffo supply enough and I us a MSD 6AL ignition so that should be ok.

So normal braided fuel hose wouldnt do ?

My motors copmpression is 12:1 thats why I would like to use methanol as I would like to run a 8:71 supercharger whilst keeping the same spec.

[Shelsleyf2]

RE Fueling with Methanol, I currently run a hillclimb car that runs on a methanol. If you think of your engine as an air pump, the fuel air ratio for a petrol engine is in the region of 11 parts air to one part petrol. With methanol I believe it is closer to 4 air one methanol, so you will need 3 times the fuel. If you supercharge it then the air consumption goes up as will the fuel in proportion. You can also work backwards from predicted BHP plus supercharger BHP absorbed...This gives a total BHP and from shaky memory 1 BHP consumes 1 litre per hour...but my memory may be playing tricks...all this means you will need larger fuel lines and a very large pump. I burn 3 litres in 30 secs, the only way I could supply this volume at a regulated pressure was to pressurise the fuel tank at 4 psi. Also if using a carb you may run into problems with the float bowl emptying and the engine running lean if the supply is insufficient. Lean running can result in overheating and seizing. The cooling requirements if running on methanol will be reduced due to the volumes of methanol entering the engine and the latent heat they absorb.

Have fun

Jimmy

[CrashTD]

If you need some info on the calcs behind the above then let me know. Not going to go to the effort of writing it all up if you don't need it. (I mean that in a nice way)

Stuff like Lower Calorific Values, Brake Specific Fuel Consumption etc.

[GCL Tuning]

You May Want to run a Meth/water meth only tank.... Then run a driect injection into the body/intake.

You will need a small flow type nozzel (mist)



Regards GCL Tuning