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Thread: E85 - Will I run out of injector?

  1. #21


    Very true Danny, I’m probably just more interested in the correlation between the figures. I was actually expecting the duty cycle to be higher, so I’m actually quite surprised. About 90% is as far as I’d want to push them, is this correct? Thanks.

  2. #22
    Join Date
    Dec 2009


    Yeah, 90% IDC or a little more.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #23


    OK, I had a chance today to give it a run on straight E85. Injector duty cycle was 88%, 7200 RPM, so tight but good.
    AFR target was 12.5 on gasoline scale and I noticed the actual was 11.8 on the datalog, but it was the first full run with a clear Learn Table.
    Car is noticeably more responsive and I’ve left the timing the same as it was for the 50/50 mix, so still room to move. Happy days.

  4. #24
    Join Date
    Jan 2010
    Brisbane, Australia


    AFR target for E85 is richer than gasoline.
    E85 Stoichiometric 9.765
    E85 Max Power Rich 6.975
    E85 Max Power Lean 8.469
    Regards, Gary

  5. #25


    Gaz64, I’m using the gasoline scale which will still be correct as the Sniper runs off Lambda anyway. My gasoline AFR WOT is 12.8 (.87 Lambda), so I set it at 12.5 (.85 Lambda) for E85 on the gasoline scale which is around 8.3 on E85.
    I’m not really sure what AFR to aim for, but I know generally it’s a bit richer. The first pull did run around 11.8 AFR (.80 Lambda, 7.8 E85 AFR) and ran well, maybe I leave it around 11.8 to 12.2, not 100% sure yet. I guess all I know is it’s capable of using E85, and I’ll speak to my tuner in regards to mixtures. Thanks Chris.

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