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Fan choice is of utmost importance. Wiring is easy. But you can have the wrong fan running 100% of the time and have it still not cool the vehicle properly. In most cases, you just cannot find an electric fan that will pull as much as a mechanical clutch fan. Period.
My example is a V8-powered Grand Cherokee with a heavy duty cooling system pulling a 7000-lb trailer in the summer with the A/C on. Compared to that, anything a Nissan does is light duty. The point is, we attempted to gain more power by going to an electric fan, had a speed shop install it for us so we knew it was done right, but it still didn't work as well as the real fan -- so we put the real fan back on and were back to where we were when we started -- the correct setup and no loss in cooling.
It used to be, in the mid 90s, that the civilian Crown Victorias had a clutch fan and the police cruisers had electric fans. This was because of the extensive idling they see, and clutch fans aren't up to idling for hours on end. An electric fan will do that all day. At the same time, they don't pull as much CFM as a mechanical fan does, so you WILL lose cooling capacity with an electric fan over a clutch fan. Whether or not it's enough for you to tell, you'll have to find that out on your own. You may never use the truck to its capacity, but if you do, I'd highly recommend sticking with a mechanical fan.
When maximum cooling is required, you will always see mechanical fans vs. electric.
Last edited by jadcock : Feb 14th, 2003 at 08:52 PM.
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