Call curt Dusterhoff. He's really got the e85 flex tune dialed in on them. My redeye only had the 3.17 upper on a flex tune and it ran awesome. Actually ran better on the e85 tune than the factory gas tune. These cars just love e85, engine feels crisp and responsive.
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Pulley & Tunes E85
I've searched with no clear answer. I'm Thinking about running a 91 pump gas tune and E85 tune with a pulley swap. Has anyone done this? Essentially I would have 2 tunes and 2 different pulley sizes. Thinking 2.85 griptec for 91 and 2.72 or 2.75 for E85. I plan to track it occasionally and would like the higher power for those days. Let me know your thoughts.
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