E-85 fuel component recommendations?

[Dark_Horse]

Lambda values are always the same for whatever fuel you use right?

Yes. Lambda values are the same regardless of fuel used.

But - just tune like you would for gasoline and you'll be fine. Just because you're running ethanol, methanol or rocket fuel, all you've gotta do is use the gasoline AFR's from your wideband and tune based on those. With E85, just shoot for between 11.5:1 and 12.5:1 on your gasoline wideband readout -7.71:1 and 8.39:1 (E85 AFR) - and you will be fine.

 

[autronicDSM]

Yes. Lambda values are the same regardless of fuel used.

But - just tune like you would for gasoline and you'll be fine. Just because you're running ethanol, methanol or rocket fuel, all you've gotta do is use the gasoline AFR's from your wideband and tune based on those. With E85, just shoot for between 11.5:1 and 12.5:1 on your gasoline wideband readout -7.71:1 and 8.39:1 (E85 AFR) - and you will be fine.

Thanks, that's what I was going to do but maybe I missed something I didn't know. I've been away from cars for too long

 

[Red97Eclipseboy]

Yes. Lambda values are the same regardless of fuel used.

But - just tune like you would for gasoline and you'll be fine. Just because you're running ethanol, methanol or rocket fuel, all you've gotta do is use the gasoline AFR's from your wideband and tune based on those. With E85, just shoot for between 11.5:1 and 12.5:1 on your gasoline wideband readout -7.71:1 and 8.39:1 (E85 AFR) - and you will be fine.

The other day, we tried E85 in my 2g with great results. I haven't done the fuel line/filter replacement yet because this was just a trial tank. I do want to use E85 from here on out, though. I don't have a wide-band, although I will be getting one over winter as I keep the 2g in the garage all winter. Could you please clarify what you mean with those values?

I might be misreading it. So on E85, are you saying to aim for 11.5:1-12.5:1 and that would be equal to 7.71:1 and 8.39:1 of I was on normal 93? Those last two air/fuels are throwing me off.

 

[Dark_Horse]

I might be misreading it. So on E85, are you saying to aim for 11.5:1-12.5:1 and that would be equal to 7.71:1 and 8.39:1 of I was on normal 93? Those last two air/fuels are throwing me off.

Unless you can select between fuels like the LM-1, your wideband will display gasoline AFR's. You can change over to lambda, but there is no reason to do that. All you have to do is some simple math to understand the correlating (insert fuel you're using) air/fuel ratios.

If your wideband is reading gasoline AFR's, but you are burning E85, to convert from one to the other, you need to do the following. Wideband readout (gasoline) /14.7 x E85 stoich (9.8:1).

So...If you are burning E85, and your wideband is reading 12:1 (because it's gasoline calibrated), you are really running: 12/14.7 x 9.8 = ~8:1.

In reality though, just tune like you would for gasoline and you'll be fine. Just because you run different fuels doesn't mean your gasoline wideband won't still work for tuning.

 

[jrohner]

Any recommendations for fuel pumps, FPR, injectors, fuel filters, etc for E-85? My current turbo is a EVOIII.

750cc's and a 255-hp pump is all you'll need on that turbo. You'll have a fuel system good enough for over 400hp on E85.

I tune for between 8 & 8.5:1 AFRs (equivalent to 12 to 12.75:1 gas). My car doesn't run right if my AFR is in the 7's. Divide your gas AFR by 1.5 to get e85 AFR, or multiply e85 AFRs by 1.5 to get gas AFRs.

Divide your real injector size by about 1.4 to get the value you should set your injector compensation at for E85.

 

[Red97Eclipseboy]

Unless you can select between fuels like the LM-1, your wideband will display gasoline AFR's. You can change over to lambda, but there is no reason to do that. All you have to do is some simple math to understand the correlating (insert fuel you're using) air/fuel ratios.

If your wideband is reading gasoline AFR's, but you are burning E85, to convert from one to the other, you need to do the following. Wideband readout (gasoline) /14.7 x E85 stoich (9.8:1).

So...If you are burning E85, and your wideband is reading 12:1 (because it's gasoline calibrated), you are really running: 12/14.7 x 9.8 = ~8:1.

In reality though, just tune like you would for gasoline and you'll be fine. Just because you run different fuels doesn't mean your gasoline wideband won't still work for tuning.

Thank you very much.