Posted 17 February 2017 - 09:55 PM
I have a hard time believing anyone has had any issue with 2 or 3 gallons of e85 in a full tank of pump gas. I have personally administered this extra 2 to 3 gallon of e85 to not hundreds, but thousands of cars that came to my station up here in Vancouver where our 94 octane fuel is garbage. Not a single one had any issues with the extra fuel requirement at these ethanol levels. Ive run in excess of 30% ethanol on my stock vehicles in various experiments. My dba Gtr included prior to any tuning.
Yes, a flex fuel kit is of course the right answer, however, as I've said before 2 or 3 gallons of e85 in a 20 gallon tank raises the ethanol content from what would be e10 up to e17.5 to e21.25.
So the fuel trim variation assuming 50% more fuel for ethanol over gasoline is between 3.75 and 5.625% over E10
If the STOCK Nissan OEM tune can't tolerate a 3.75% to 5.625% increase in STFT then the ECM in the gtr is the biggest piece of shit since megasquirt.
Now, if you are tuned then get the car tuned for e20 and trims aren't an issue. Or get a flex fuel kit.
But again this was a suggestion made for people who are stock and are running into limp mode from the stock ignition advance strategy of the dba models in places like Cali, Nevada, and Arizona. Better to have 5% increase in fuel trims than to keep hitting limp mode for those that want to leave their dba stock wouldn't you agree?
2012 GT-R Black Edition
3.8 10:1CR built by Bill and Tommy at Indy Speed Shop
Heads by Curt Brown, Pocket port, Kelford 231-A-K2 cams, Tomei springs
AAM GT1200R - GTX3076
AAM Race Intercooler
Fore Innovations triple walbro 485
SD Flex Tuned by Ben Linney
1116whp Mustang 34psi E80