Top tier E85 needed for tune?

[pr5speed]

Hello all,

Long time listener, first time caller here. I bought my FiST this last January, and love it! Mod bug is hitting really hard!

Mods include Whoosh FMIC, Cobb RMM, Silicone induction hose.. to name a few.

Anyways, I am looking to get a tune from Stratified. One of the Maps I plan for being a E30.

However, Thornton's and Racetrac are the only E85 dealers in a 100 mile radius. My car runs rough with Racetrac 93 octane on my Cobb 93 OTS map. I only feed her Shell gas now.

Will cheap E85 mixed with cheap 93 from Thornton's affect the ride?

 

[gtx3076]

I don't bother with top tier. I use racetrac to mix my e30. Been doing it for years.

Sent from my SM-G930T using Tapatalk

 

[Hypergram]

Just test the E85 at your closest location and change how much you fill accordingly. Cobb OTS maps are kinda meh anyways so hopefully the roughness will go away.

 

[Rocketst]

To add to this, any tuner worth his salt should be able to make a flex fuel map when you can't get a reliable ethanol percentage.... I know stratified offers it and so does adam from tune+.

Sent from my moto z4 using Tapatalk