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I have an LS3 with a Vortech that I'm trying to get tuned on E85. (DSX FF kit and DSX Aux pump) It has already been tuned on 93. Can I modify my current tune so that it knows E85 is in the tank, but not add the additional timing or performance aspects of the tune? Just need to drive it 8 miles to the tuner on E85. No boost of course.
Is that possible? If anyone is willing to help I can upload my tune from my laptop.
Thanks,
Just change you stoich under the general fuel tab to 9.68 in the entire table. If the fueling was correct on 93 that will be close enough to get it to your tuner.
Pure e85 is closer to 9.8x, but also take into account most pump e85 isn?t full blend.. also did it have any 93 left??
I would sit it closer to 10.5 on stoich but 9s be fine too.. we are only talking half a percent and fuel trims will take care of fuel in closed loop
Well that's easy enough... So I planned to run it empty at the pump, fill with the E that I will be using most often (closest to my house), flash the tune, then take it in for a tune.
Should I also switch my wideband to read lamba? If I cant switch to lamba, what should it read running E to indicate fueling is correct?
Use gas scale be fine... AS long as stoich is changed to reflect Alcohol
Thank you guys. I went with Ben's recommendation of 10.5 just to get me to the tuner.
Attachment 85271
Just wanted to report back. I filled the tank with E85 and changed stoich to 10.5, and it worked out great. It took a few seconds for the 93 to clear the fuel lines, but after that it ran well enough to get to the tuner. Thanks for your help.
Glad we could help