Rogue4x4

As an on road daily, not an issue. If I was after total HP, I'd rethink. I drive my rig daily. Works for me.

Boils down to what you want, what you need, and what you got.

Rogue4x4

To be completely clear here...I took it to the smog referee after I put it in. Passed with zero problems. Not a single issue since.

I did it by the book.

TRCM

Don't forget, e-fans do some things most people don't think about:

1) suck the battery down faster (if the fan is powered directly from the battery), which means the alternator has to recharge it more frequently, which means more loading on the engine

2) causes a higher current production rate for the alternator (if wired to run off the alternator), which means more load on the engine

Both of these mean the hp you think you are getting by removing the clutch driven fan are being eaten up by the alternator loading on the engine.

4.3L XJ

Thanks

mschi772

Right--a lot of people forget the electricity isn't free. There's still a net gain of hp though because the electric fans do their work much more efficiently than the clutch fan.

I actually have a very nice shroud and triple e-fan setup on a shelf in my garage. What keeps preventing me from using it is my inability to find a controller that I'm satisfied with. I'd love something like a PWM controller that can modulate the speed of the fans for any given temp instead of just flicking them on or off at an arbitrary temp, but I just can't seem to find any that I trust. I tried getting one from DCControl, but that guy is a complete *$&%$*%, and I canceled my original order with him.

What I've never liked about people's love for the Taurus fan is that I've never seen a Taurus fan installed in an XJ such that it's pulling all of its air through the XJ's radiator. I've see some attempt to build a "shroud" that blocks any fan "overhang," but I've never seen that done in a way that understands how air as a fluid works--airflow THROUGH the radiator is still not maximized. The best setups using the Taurus fan I've seen have attempted to install trans coolers in front of the fan's overhang in order to make use of that excess fan size, and while that's nice, it would be disingenuous to claim that 3800 cfm through the XJ's radiator was possible.

firebane

I found the perfect switch for the electric fans... unfortunately is a m22 thread lol.

cleenrob

your definatly right that the alt will put more load on the motor, but were talking a couple HP extra load. your still getting more hp to the wheels

as far as the taurus fan goes, i used the volvo variant( has a removable shroud) then i took just the fan and bolted it to the stock xj shroud with the volvo fuses and controller with a saab temp switch to controll speeds

i use the same fan to cool the 5.3 too

4.3L XJ

I agree, most people don't do well with making shrouds. However this is the one I made that has the fan back far enough to take advantage of the entire blade area. I have another electric fan for the stock efan area also that pulls about twice as much air. Needs a good alternator for both of them though

TRCM

It's more than you think.................don't think it is as much as an electric fan on WFO, but it is more than 2 or 3 hp. Why do you think they use such wide belts and have at least 120 deg of grip on the pulley for them ?


.

firebane

Even that setup your still losing static pressure and airflow from the fan to the radiator. It may work but it is not optimal.

4.3L XJ

All I can say is that it works very well by itself without the other fan. So that is all that counts

HelmuthJ

OK...no one has noted replacing the clutch fan with a Flexlite Fan Assy....
Question... Waste of money.. ???

00t444e

Yes the flexlite e fan won't pull as much air as a mechanical fan and you could have overheating issues.

ShadetreeCherokee

Does anyone know the part number or Volvo car model the fan in post 37 refers to?

FOXxX

I switched out to the Taurus fan back in 2010. Trimmed the shroud as best as I could and got it installed. ive made several cross country trips - in the summer. Not one issue. I noticed a significant difference in HP gains when I made the swap. Sure... it might be harder on the elec but definately reduces the drag on the crank. I did the change for the HP gains. Works great for my setup.