Author Topic: Fuel tank size question...  (Read 7745 times)

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Blue

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Re: Fuel tank size question...
« Reply #15 on: October 04, 2008, 09:35:13 PM »
Gasoline 20,943 BTU’s/lb - 14.7:1 air/fuel ratio - 1415 BTU’s/lb of air
Methanol 9,770 BTU’s/lb - 6.4 air/fuel ratio - 1527 BTU’s/lb of air.
Not as good a heat source as gasoline, but you can run more of it.
Methanol gets you about 22% more bang and runs much cooler. You will see ice on the fuel system on a cool day.

Roughly twice as much methanol as gasoline.

Nitromethane 5,160 BTU’s/lb - 1.7:1 air/fuel ratio - 3035 BTU’s/lb of air.
Nitromethane gets you 123% more heat. Even a little adds a bunch of power.
On a previous team I was told it was
gas: 13:1
methanol: 8:1
70% nitro/29% methanol/1% benzene: 2:1

By Dean's numbers, we would have been rich on gas and lean everywhere else.  From what I have seen here, I'd use 6.5:1 as a planning figure.  Although I would never run methanol over a lambda of 1.1 for fear of washing the oil film off.  JMHO.