if the fuel system is setup for alcohol it is a decent fuel. It is quite corrosive. But it burns cooler than gasoline so you can run more boost. But it has fewer btu of energy so you need more of it than gasoline. Hense the need for a larger pump, this in turn requires the larger feed and so the pressure can be controlled by the pressure regulator so a larger return is also needed. This can all be added and the stock stuff left there so the car can be returned to stock in the future if that need arises. Then there is the larger injectors. And a need to control them . You can see how this spirals out of control.