Quote:
Originally Posted by stilmissmysti
10.5 is lean on e85
Fuel AFRst FARst Equivalence Ratio Lambda
Gasoline stoichiometric 14.7 0.068 1 1
Gasoline max power rich 12.5 0.08 1.176 0.8503
Gasoline max power lean 13.23 0.0755 1.111 0.900
E10 stoichiometric 14.0 - 14.1 ? ?
E85 stoichiometric 9.765 0.10235 1 1
E85 max power rich 6.975 0.1434 1.40 0.7143
E85 max power lean 8.4687 0.118 1.153 0.8673
E100 stoichiometric 9.0078 0.111 1 1
E100 max power rich 6.429 0.155 1.4 0.714
E100 max power lean 7.8 0.128 1.15 0.870
that means you should IDLE and regular driving should be around 9.8 (idle could go much lower like 13's) and WOT should be in the high 6's and any boost should be in the 8.5 range
E-85 pulls more heat than gas and will run leaner (in lambada standards) but you are far short of maximizing your set up
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If you ever had used E85 and a wideband, you would know gauges displays "measured lambda x 14.7", which means stoich will show 14.7, no matter what fuel it is.
10.5 on a gauge display for e85 is quite rich, i usually get good results with 12:1, bit more with 11:1, but richer does not yield anything.
06-11-2012, 12:34 AM
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