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Thread: e 85

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    tealgreen2000's Avatar
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    e 85

    im in the process of building another fz was thinking about running e85 has anyone used this what size injectors are needed ive got the 340 pump with a et 18 an was thinking of use the r4 an planning on running around 9200 an should be seeing around 20-21 psi an with the additional timing of the r4 i dont thing pump fuel will work so looking for info on running e85 thanks for an info


  2. #2
    1000cc at the least..

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    I love e85 with boost but not sure how I would feel about running it on the water. Make sure you buy a test kit if you do as the rating can vary greatly.

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    HydroStream6's Avatar
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    I've tuned countless turbo cars on E85 and it is a fantastic fuel. If you do the switch, make sure you start on rich enough. E85 can allow for much higher boost and timing than gas, but it will not give you any indicators when you're on the edge of something bad happening like gas will. I would start out at least double capacity for injectors and pump as you would for gas.

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    tealgreen2000's Avatar
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    Quote Originally Posted by HydroStream6 View Post
    I've tuned countless turbo cars on E85 and it is a fantastic fuel. If you do the switch, make sure you start on rich enough. E85 can allow for much higher boost and timing than gas, but it will not give you any indicators when you're on the edge of something bad happening like gas will. I would start out at least double capacity for injectors and pump as you would for gas.
    What are u running as far afr`s at wot

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    HydroStream6's Avatar
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    I like to run pretty fat with turbo cars, around 0.77 lambda. E85 is not quite as affected by overfueling as gasoline, but there is still more power to be made if you run a little leaner. I personally wouldn't run E85 leaner than 0.82 lambda.

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    imp0ster's Avatar
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    I'd run i the low 11s or very high 10s on high boost and dump a shit ton of timing on it. ID1000s are minimum

  8. #8
    HydroStream6's Avatar
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    You just need to be a little careful with the timing. Since E85 doesn't really knock, unless you're on a dyno and can see the power, you won't really know when you're past the critical point. Its easy to bend rods with E85 if you get carried away with the timing. BUT you can generally run MUCH more timing and boost and make much more power with E85 if you're careful. I may try it in the ski eventually.

    When I tune, I also make sure I tune conservatively on true E85. This way if you get a batch which is slightly less on ethanol content, you will run richer than you are tuned and will generally be safe.

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    imp0ster's Avatar
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    If you're in FL you HAVE to be careful with timing since the fuel around FL is unreliable and filled with shit. Or at least the tampabay area

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    Quote Originally Posted by imp0ster View Post
    If you're in FL you HAVE to be careful with timing since the fuel around FL is unreliable and filled with shit. Or at least the tampabay area
    Not just tampa bay, S FL gets the same crappy fuel. You need to always test each time you go to the pump to check what the actual percent is as it varies widely.

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