I have heard the 10% number a few times which on my car would be 50hp. I would be amazed.
now whats this guy talking about in the first link? you will need
Flex Fuel compatible ECM like FAST XFI or BigStuff 3
Fuel Composition Sensor
Wiring and Plumbing of the Ethanol Sensor and Fuel
Thats stuff is not needed. I plan to get an Ethanol tester and sample each fill up. 80lb injectors and a BAP. 04sleeper on MF can give you some good info as he runs e85.
Sold
2004 Cobra, Whipple ,TH-400
Burning Corn
9.97 - 135.5