Should I Start with my Flex Tune and then switch to dedicated E85 after a few tankfuls?

[Phoenix]

just got my flex and e85r tunes from lund. kermitz and the large member are right. its amazing how much smoother the car runs on ethanol. i dont want to go back to 93.

FYI: lund told me 75% on the FF_ALCH on the nGauge in order to run the e85r tune. up top it makes no more power but down low they smash in more timing, thats the only different. i run around in flex right now as were getting into winter blend it seems.

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[jmeiers]

If you have E85 readily available, just run it year round and forget about it.

 

[offroadkarter]

If you have E85 readily available, just run it year round and forget about it.

I would do this if I wouldn't have to fill up every single day driving the car to/from work on E85. I get 15 highway on E85 compared to 22-23 on 93, if I really tried to stretch across 2 days I'd probably get back home on literal fumes.

Been enjoying the flex fuel tune around town though, finally after 4 fills I got a 91% ethanol reading, so I swapped to the E85R tune. Can't wait to see how much stronger it gets, already really impressed with the 93 and FF tunes.

 

[Biggus Dickus]

If our E85 stays as high as it has been all winter, I'll just run the E85 R tune. In So Cal, it stays warm enough to run "summer grade" all year round. I'll keep testing it.

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