I havent price it but we pay about 400 for a 55 gallon drum of 110. I would say your probably lookin around 300+ maybe???? IDK. But I dont really see how this is cheaper. Remember you need to completly redo the fuel system to use E85. Its actually alcohol and that will tear some of the fuel parts up in a hearbeat. Plus it is a less efficiant fuel so you need to use more fuel to equal what is possible with race gas. Plus alcohol wash's down the cylinder walls and contimates the oil. No big deal but in turn you will have to change your oil more often. Next time you go to the track walk by the pits of an alcohol car and look at the oil they drain from the motor it looks like milk. Thats the alcohol washing down the cylinders into the oil. Now E85 isnt as bad because its not straight alcohol but it will still do it. Thats another cost you have to add onto this.

My advice would be like I said to get a boost controller, which I am pretty shure all you turbo guys already have. Make some sort of drain in your fuel tank maybe. When you wanna jack the boost up drain the pump gas from the tank and poor some race gas in it and go play.