93 octane and NO ethanol...

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ecksrash
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93 octane and NO ethanol...

Post by ecksrash » Fri Jan 09, 2015 3:53 pm

So I've been battling with jetting my IDAs and have been running 93 with no ethanol. How would running real unleaded gas differ from running 93 with ethanol? I'm thinking one would jet richer WITH the NON ethanol gas... I will be setting up a wide band to assist with the chore, but would like a little insight before I get into it. Thanks DS

Steve Arndt
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Re: 93 octane and NO ethanol...

Post by Steve Arndt » Fri Jan 09, 2015 8:03 pm

Lambda1 with E10 is ~ 14.1:1 AFR
Lambda1 with E0 is ~ 14.4:1 AFR

You will lean out just a bit with the fuel changeover as you mentioned. You may make a little more power with a degree or two less timing on the real 93 as well, have to test it out.

Steve Arndt
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Re: 93 octane and NO ethanol...

Post by Steve Arndt » Fri Jan 09, 2015 8:05 pm

Another thing to watch out is the E0 stations here are mom and pop types with very slow fuel sales. I've had fuel that smelled like diesel from these stations. Their pure E0 91 pinged worse than Chevron E10 91 the three times I tried it.

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