I wouldn't expect much from an electric fan swap. If your factory clutch is working as it should, it is fairly efficient in and of itself. And remember, the only way to get any gains is to have the fans properly setup & controlled. Having them on a constant speed at all times doesn't bode well for efficiency.

 

Yea I made sure to get the thermostat kit so that way they turn on when then need to and arent running at all times, I bought a mustang once that was wired that way to a toggle and I would constantly forget to turn them on.