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02-23-2020, 12:08 PM | #1 |
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Help Needed. OFT v2 with E85. At race track
I am at Eagle Cannyon race truck. My buddy broke his car so I am sharing mine with him.
Problem I am running E85 and low in fuel. Can I mix E85 with 110 race gas, and run E85 tune? The blend will be 70% E85 and 30% 110. Seems make sense for me but any comment is welcome. Sent from my SM-G892A using Tapatalk |
02-23-2020, 02:14 PM | #2 |
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Should be fine. All that should happen is you will run a little rich until the ECU compensates by dialing back the fuel trims. Ignition timing should be fine since 110 has a higher effective octane than e85.
That said, I've never actually tried it so take that with a huge grain of salt. If you've got your OFT with you, I would datalog and keep an eye on fuel trims and knock.
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02-23-2020, 10:19 PM | #3 |
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The octane gives you the power benefit, but the Equivalence ratio won't be right.
It will help keep knock away, but you still need to burn more ethanol per unit air than gasoline. Mixing to a lower ethanol percentage will make the car run richer |
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02-24-2020, 04:16 PM | #4 |
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If the car runs richer, Will ECU compensate the mix?
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02-24-2020, 05:53 PM | #5 |
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03-04-2020, 01:05 AM | #6 |
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After giving this thought its not a good idea. The tune is looking for e85 and even though the octane is very high, the tune is setup to to burn more fuel. This if you add race gas you got the octane number but you will need way less fuel to do so and the car will run like shit and super rich. So I hope in hind sight you did not push the car in that state. Yes the ECU can adjust but your fuel trims would be super out of wack
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03-04-2020, 02:13 PM | #7 |
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110 leaded? No; you will destroy your O2 sensor.
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03-04-2020, 02:36 PM | #8 |
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should reflash to a 91/93 tune and run that with your 110. or better yet get actual 91/93
i would never fuck with E with mixtures and Off the shelf tunes. unless it has the mighty flex fuel. |
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03-05-2020, 12:17 AM | #9 |
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Wish I’d seen this thread, I was at ECR at the same event in the white BRZ #93. If you’d come asked I had my car laptop with me and we could have loaded a 93 tune. There was 93 available at the track as well.
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03-05-2020, 02:42 PM | #10 |
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Hope I see you around next time. Normally I do HDPE in Houston. I couldn't run 93 tune since my gas tank was 3/4
I was sharing the car with a mate that broke his Mini, I was worry to run out of gas, or having fuel starvation (it happened to me at MSR CCW with half tank). My idea was trying to add a cuple of gallon to be sure we have enought for both. Not brillant good idea as I see. Finally the rain in the afternoon changed plans. I was with the Hot Lava #735 |
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