brentg454
June 2nd, 2025, 11:21 AM
Hi,
I just added a flex fuel sensor and pin# 38 in the ECU of my 2016 SS to enable flex fuel and have confirmed it is reading the correct alcohol % with PID E85R. I have changed the stochiometric values for flex fuel [B3671] along with the "enable" and MIL tables ([B0178, B0184, and B0186] and C6001), so we are all good to go and it's running great. From what I've read, this is the minimum to get flex fuel working, but there are other tweaks that can be done in the tune to maximize the gains from E85.
For anyone else out there that has done this, what tables did you tweak to maximize the gains from going E85? I've searched all over and can't find any specific info, just references to adjusting the spark tables. Can anyone clue me in - is it spark correction, mixture, multiplier, the ethanol spark table itself, or something else?
Thanks,
Brent
I just added a flex fuel sensor and pin# 38 in the ECU of my 2016 SS to enable flex fuel and have confirmed it is reading the correct alcohol % with PID E85R. I have changed the stochiometric values for flex fuel [B3671] along with the "enable" and MIL tables ([B0178, B0184, and B0186] and C6001), so we are all good to go and it's running great. From what I've read, this is the minimum to get flex fuel working, but there are other tweaks that can be done in the tune to maximize the gains from E85.
For anyone else out there that has done this, what tables did you tweak to maximize the gains from going E85? I've searched all over and can't find any specific info, just references to adjusting the spark tables. Can anyone clue me in - is it spark correction, mixture, multiplier, the ethanol spark table itself, or something else?
Thanks,
Brent