What’s the deal with RR racing not offering a n E85 tune for NA? They say it won’t produce any power. I’m sure everyone will disagree with that statement. It’s been proven over and over that E85 improves power on any engine with tuning.

 

There are other tuners that tune for E85. Look into Tuned by Loi.

 

x2

 

x3 on this.

I know you asked specifically about E85, but take a look at his IG for dynos using everything from 91 with stock parts to E85 with other modifications. Then compare the gains (not the peak numbers, because different dynos) and where they are in the RPM-range to RR’s and decide which makes the most sense to you.