Ive been leaning more towards an e85 capable fuel system lately to help with heatsoak in the summer months but I still cannot make a decision between that or a KC. I know what the KC is capable of and all that, but not what e85 is. Ive only had experience with it in my old jb4 335i. Now for those running e85, how do you like it? Can you tell a difference as far as the car pulling less timing and overall feeling less sluggish when heatsoaked from stop and go traffic or high humidity weather? If I can put together a fuel system for my GT that will support about 420-430whp (and still have room to grow in the future) that isnt too expensive, I will go with e85. Im thinking 80lb injectors (maybe 60's will suffice for now), Cobra tank with upgraded pumps (still not sure what pumps I will need). Maybe a lethal budget return system? Any help would be appreciated.