Supercharged E85 Tuning?

s300 and SManager software questions & answers
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leoldenb
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Joined: Mon Dec 01, 2008 8:17 am

Supercharged E85 Tuning?

Post by leoldenb » Mon Dec 01, 2008 8:22 am

What are the recommended air fuel ratios for tuning an engine on E85 with forced induction?

Martian
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Joined: Sun Aug 20, 2006 4:23 pm
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Post by Martian » Mon Dec 01, 2008 9:20 am

A/F ratio is the same as pump gas. Ethanol contains more inbound oxygen, and you will find it take about 30% more fuel to reach the same A/F.
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inspector01
Posts: 15
Joined: Thu Oct 09, 2008 2:57 am

Post by inspector01 » Tue Dec 02, 2008 5:13 pm

Yeah, A/F ratios will be the same as what you would with regular gas, but you can usually lean it out quite a bit at cruising for better gas milage. I was running mine in the high 15's, low 16's when cruising with no problems.

Silverbeast
Posts: 127
Joined: Wed May 21, 2003 12:03 am

Post by Silverbeast » Fri Dec 12, 2008 5:56 pm

I would encourage you to use Lambda on tuning with e85. Depending on climate and e85 mix the injector will take 30-40% more fuel. It also will require timing advance in the neighborhood of 4-5 degrees.


Just a base/rule of thumb, please have your tuner check everything out.

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