How many degrees can u put for E85

[Kraftsman]

Eric Brooks.

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where is he out of, I'm looking for a tuner in the midwest that knows what he is doing when tuning for e85.

 

[stkjock]

have you tired Livernois?

 

[Kraftsman]

No, aren't they more of a LS shop though? Dont they mostly work on camaros and corvettes? I did try brenspeed, they dont. they claim there is to much inconsistancy in the fuel. Maybe I'll just try c16. I dont know, I'm always changing my mind.

 

[05yellowgt]

where is he out of, I'm looking for a tuner in the midwest that knows what he is doing when tuning for e85.

Eric is out of GA, but he travels to tune and can do remote tuning.

 

[stkjock]

Livernois does plenty of Mustangs. IDK what their E85 familiarity is, but worth the call, IMO

 

[TurboPete]

24* of timing and 24 psi's on the Dyno , Made 821rwhp/ 851.77 rwtq.

Pete

 

[BruceH]

where is he out of, I'm looking for a tuner in the midwest that knows what he is doing when tuning for e85.

FYI there isn't much to making your gasoline tune into an e85 tune. The maf transfer doesn't change and everything in the tune is based off of lambda so af ratios as we know them aren't really brought into account.

A base E85 tune is as simple as taking your gasoline tune and changing the stoichometric ratio to whatever you E85 tests to. The formula for finding it is easy enough. (gas % x 14.64) + (ethanol % x 9) = stoichiometric ratio.

For example: Actual E85 will be 15% gas and 85% ethanol. .15 x 14.64 = 2.196. .85 x 9 = 7.65. 2.196 + 7.65 = 9.846.

Using the same formula with E70 results in a stoich of 10.7.

Once the proper stoichiometric is entered into the tune all that's really left is timing and cold start/lost fuel adjustments provided your maf transfer was correct to start with.

Since most widebands are set to read 14.64 for lambda 1 the displayed air fuel will look the same as with gasoline. Lets say your open loop fuel tables are .8 lambda at wot, this would give a reading of 11.7 same as .8 lambda for gasoline even though the tune is commanding .8 x 9.8 = 7.84 for an air fuel ratio.

Clear as mud?

To recap all that is required to tune for E85 is to enter the actual stoich and start adding timing. Lost fuel and cold start tables will also need to be adjusted for driveability. Treat the wideband reading like it was gasoline.

Keep in mind I'm not a tuner, just a guy with prp who has to keep his mind occupied at all times.

 

[05yellowgt]

I would add that there are a few Gerald you can make to an e85 tune that you can do to get more out of it. You can generally get away with a slightly more lean afr at cruise than you can with gasoline and I have found best power at around 11.8 as read on a wideband calibrated for gasoline stoich. Timing can be tweaked at cruise and part throttle to provide very crisp response and power.

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