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How would a 10 percent ethanol content as part of 93 octane pump gas, change stoich for said fuel, if at all? Is there I "finer" number to compensate more accurately for that presence of ethanol? Or is it trivial? I. E.
Would say, 14:1 be a better ration to convert to lambda?
If I'm not wrong, usually in the USA some of the gasolines has allready a 10% of ethanol. The AFR is 14.06:1 if I'm not wrong
The nice thing about lambda is that it's independent of the fuel's actual stoichiometric Air-Fuel Ratio. Most gauges convert the Lambda number to AFR (Gasoline) by multiplying by 14.7, so regardless of the fuel, if you wish to work in AFR units, then just use the standard gasoline values, and ignore the detail that is not exactly the real ratio for a particular fuel.
