tuning from 93oct to E85 turbo 4.8

[jheiner]

Truck is currently tuned and been running great on 93 pump gas. Truck is ready for E85. Is there a good idea what % to change the fuel and air tables or a direction to go with. I dont believe loading a stock file will get me real far. Can i base off my 93 octane tune for the 85???

Tahnks

[kevin87turbot]

Truck is currently tuned and been running great on 93 pump gas. Truck is ready for E85. Is there a good idea what % to change the fuel and air tables or a direction to go with. I dont believe loading a stock file will get me real far. Can i base off my 93 octane tune for the 85???

Tahnks

It's best to run a flex fuel sensor with that combo. Otherwise, you'll constantly be making adjustments. Somedays you may have 70% E, other days, you may have 85% E. If you have a sensor and proper tune, you won't have to make adjustments, the PCM will do it for you.

[blindsquirrel]

51%E can legally be sold at the pump as "E85".

[dhoagland]

51%E can legally be sold at the pump as "E85".

Wow.... Didn't realize it was that big of a spread

Here, North of Dallas, the best I've got was E80 (and I check it to verify my sensors accuracy, my first sensor was not to consistent so I'm still establishing trust in this one).
My fill ups are from E70 to E78, Like Kevin mentioned.