Civic X and E85

[jacobegg]

Wanted to start a thread to see and hear feedback from those of you using a flexfuel kit. How long Have you had it? Any troubles? What % do you like to keep yours at? What’s your 0-60 times? What your butt dyno say? The more info the better
I’ll start
I have a 2016 Sedan touring.
All I have for the engine is a 27Won intake, 27Won rmm, Hondata, sirimoto flexfuel kit.

I’ve been running Hondata +6psi w/flexfuel for about 7 weeks now. Little over 5000 miles. Typically I’ll do every other tank with E85. 91 then a 91/E85 mix. I try to keep it around 40%. Today I did a 0-60 test with Hondata “race track” mode that gives you all your stats. Said I did 0-60 in 4.6 seconds. Which honestly surprises me. Almost have my doubts. But hey I’ll take it. I currently have all season tires and it shows. They spin like crazy even with Hondata traction control.

Side note, I read on sirimotos flexfuel kit that peak performance is at E70. Anyone take it up that high?

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[IronFusion]

Physics-based peak power on an ethanol blend is E30-E40.

I've had on the PRL kit for a few weeks. I'm driving so little it's a shame. Had to take of my all seasons after the upgrade. Even on my lower performance tune I had tire spin with part. throttle when lights turned green.
I'm going to adjust BBG on my custom tune when I have an opportunity- what I have no longer keeps the tires from spinning.

 

[EkSean]

I’ve been on flex fuel for a few months now and I always run 30-40%. It runs smoother, my knock control stays at .49 and it’s considerably faster than straight pump gas. I am full bolt on with W1, e tuned by DRob though. No clue what my 0-60 is but it is slow because I’m also on Goodyear all season. 1-2 gear is useless because it just spins.

 

[jacobegg]

Thanks for the updates! I recently got mine up to 50% out of curiosity. And that extra 10% made a hell of a difference.

 

[IronFusion]

Thanks for the updates! I recently got mine up to 50% out of curiosity. And that extra 10% made a hell of a difference.

That's a result of the ignition map of your tune. A lot of the OTS Tunes with ethanol enabled ratchet up the ignition advance with ethanol content based on general non-L15b7 experience. Check the forums or online for the benchmarking Vit did with Ethanol Blends. 30-40% is the known sweet-spot. The reduction in energy content and need to inject more fuel above this range are detractors.

 

[jacobegg]

That's a result of the ignition map of your tune. A lot of the OTS Tunes with ethanol enabled ratchet up the ignition advance with ethanol content based on general non-L15b7 experience. Check the forums or online for the benchmarking Vit did with Ethanol Blends. 30-40% is the known sweet-spot. The reduction in energy content and need to inject more fuel above this range are detractors.

Yea this is what I read on it. 30%-40% on custom tune, but up to 70% on Hondata’s base map

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