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Scion FR-S / Toyota 86 GT86 General Forum The place to start for the Scion FR-S / Toyota 86 | GT86 |
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05-28-2020, 08:17 PM | #1 |
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Questions about ethanol levels, tunes, and flex fuel sensors
Lately I’ve been really thinking about going E85 since the fuel is pretty common where I live. But the pumps around here usually say “51-83% ethanol”. I’m trying to get away with not using a flex fuel kit, since there are enough E85 stations around to always run E85 exclusively and it’s only a weekend car, never going on long trips.
I know that plenty of people run E85 with no kit, and I have read that OFT’s E85 tune works down to E50. But is it okay to run 50% with no flex fuel sensor? Or is there a minimum level required to run without it? And even if it’s okay, am I missing out on any performance without a flex fuel kit? Or do the car’s sensors and ECU adjust the trims on their own without the kit? Before I make any decisions I’m gonna get a test tube and sample the fuel from a few stations around here to know what I’m dealing with. Given the season, I’m hoping the ethanol levels are high right now Thanks |
05-29-2020, 05:17 PM | #2 |
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My first answer is just get sensor and be done with it. If you are tuning yourself OFT will get what you want. When you change fuels you will need to re-flash. If you go with ECUTec you can make different MAPS different E content so you will not have to re-flash just change MAPS.
You will never regret going E85, the engine runs smother and it is worth it for the mid range torque change. |
05-29-2020, 05:30 PM | #3 | ||||
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05-29-2020, 06:16 PM | #4 | |
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05-30-2020, 10:42 AM | #5 | ||
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06-01-2020, 01:53 AM | #6 | |
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yes if you have known stable e85 then you can scale maf on e85 if you have a flex sensor on oft or ecutek flex tune then that is adjustjng for ethanol content |
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08-15-2020, 04:27 PM | #7 |
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Follow up to this: is there a way to read the ethanol content through the oft after putting on the flex sensor?
Last edited by aw11; 08-18-2020 at 09:04 AM. Reason: Turns out I just had to update my OFT template. Now ethanol% is one of the available parameters to monitor |
08-16-2020, 09:59 AM | #8 | |
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I went ahead and spent the money on FlexFuel. I'm toying with the idea of going boosted eventually and figured a more accurate adjustment and the convenience of not having to worry about flashing and where to fill up we're worth it for me. We went on a short weekend road trip just this weekend. Went out on e85, but had to fill up out in the boondocks where I couldn't find e85 to come back home. No worries, hassle free. My tank now has about 28% e85 and my ECU knows what to do with that. |
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08-24-2020, 10:52 PM | #9 |
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If your daily driving your car get ecutek, and a flex fuel kit. Trust me it's worth the extra $$$
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