Quote:
Originally Posted by enkeivette
That's interesting, pretty damn lean, does it run any hotter like that?
And the AF ratio in a normal engine can also be 14.7:1 at WOT, with more fuel/ air consumption. Trying to see here where there is the least fuel consumption, because 14.7 is just a ratio.
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normally what ull find is on well built and cooled motors have these general afr's
rememer this is for petrolium based fuels IE. 91, 100, C16 octane's etc....
16.1:1 = best fuel consumption for running the engine at its leanest
14.7:1 = best fuel emissions reason y all cars read this almost everywhere
12.5:1 = most power potential.
as for my afr of 18.1-17.8 its because im running ethonal E85 and it cools the combustion temps which in turn cools the egt's my egts are around 800F while cruising when they used to be at 1400F on my gas tune at 14.7afr. also e85 is highly oxygenated so its gonna raise that air part of ur afr.
so what might be a 14.7 afr on gasoline, would in turn be a 16.4:1 on e85
really if u guys couldnt tell im enjoying everyday im running this hippy corn shit
also when u get into the most efficient power, and best fuel consumption afr for e85 things kinda get mixed up.
im not even sure of what the best afr for e85 is because of its high oxygenation which in the tests ive done in my car have seemed to end up being the 18.1:1 range and the engine actually starts starving for fuel but doesnt over heat. u just get split random nano seconds of random cylinder misfire.
and in theory the best power ratio for e85 is around 9.4:1 i believe but if u run it that rich it bogs ur engine down alot!!!
but in reality ive found that 12.5:1-12.8:1 seem to do just dandy for the best power ive made out of e85.
im sure with a direct injection motor such as the one found in the solstice u could get more power out of a richer fuel ratio for gasoline and e85.