What you'll lose in drag on the stock fan you'll pick back up on the alternator when the electric runs. The old adage "you don't get something for nothing" is very true in the auto world. If you don't understand what I'm talking about, turn off everything electrical in the VX while it's running and just listen to the engine for a bit. Then turn on the lights. Notice the difference? That's the alternator loading up and dragging the engine. The more current draw, the more load. That Isuzu fan is actually well designed. The trick is keeping the thermo area clean and lubricated so gunk and dirt don't build up causing it to run more than it should. And the best part is that as long as the engine is turning, so's the fan. Just my .02c!