engine driven fan

[Rearanger]

What CFM are you trying to get? Less CFM will give you less load but less airflow cooling - especially for A/C. Fan blade weight will surely reduce load but using this fan on an OEM clutch will not probably get much load reduction (given same CFM) since most of the weight is in the clutch, even though it's close(r) to the center of rotation. Is the flex fan designed to give constant CFM at variable RPMs?

 

[--weezl--]

you can get an e-fan setup from the jy for half that

 

[basketranger]

Summit has an E-fan with SHROUD for a little over $200.00. There are several folks on here that will talk u into keeping stock, however if you will look at where they are from those folks live in northern country, have no idea what we in the heat belt deal with. If they went with an E-fan they probably would not get any efficiency with it because it would hardly ever need to come on, whereas here in the heat belt our fans pretty much run constantly....Notice the word SHROUD that is just as important as the fan itself.

 

[McCormack]

R-i-i-i-i-g-h-t... it never gets hot in the north.

 

[Rearanger]

If they went with an E-fan they probably would not get any efficiency with it because it would hardly ever need to come on, whereas here in the heat belt our fans pretty much run constantly....

One of the measures of E-fan efficiency is only running when needed - the longer they DON'T run the better. Fan running more in hotter climes would question the net gain from expense of conversion.

 

[Hahnsb2]

One of the measures of E-fan efficiency is only running when needed - the longer they DON'T run the better. Fan running more in hotter climes would question the net gain from expense of conversion.

The amps drawn to power an E-fan via the alternator suck less power than a mechanical fan.

 

[Rearanger]

The amps drawn to power an E-fan via the alternator suck less power than a mechanical fan.

Hence my term "net" gain. But no one has measured CFM of clutch fan against stated cfm of aftermarket e-fan, so final gain comparison is foggy and unfair. Power to drive same cfm whether electrical or mechanical would be the same as electrical power is not free. The heavier weight of clutch fan is closer to center of rotation (easier to turn) and with clutch not always drawing 100% to drive cfm would end with net gain for e-fan with no center weight. What that gain is has not been measured on this forum against the cost of quality e-fan installation.

 

[--weezl--]

Hence my term "net" gain. But no one has measured CFM of clutch fan against stated cfm of aftermarket e-fan, so final gain comparison is foggy and unfair. Power to drive same cfm whether electrical or mechanical would be the same as electrical power is not free. The heavier weight of clutch fan is closer to center of rotation (easier to turn) and with clutch not always drawing 100% to drive cfm would end with net gain for e-fan with no center weight. What that gain is has not been measured on this forum against the cost of quality e-fan installation.

that's not exactly true, you're right on most of your points, but a mechanical fan and e-fan pulling roughly the same amount of air, with comparable hp needed to turn it (not draw on motor, actual power to turn the fan) if the same, the mechanical fan WILL be more efficient, as there is always loss of energy in transference of type, ie, rotational energy to electrical energy=loss, electrical energy to rotational=loss, just in it's self not to mention there is light energy given off in the alternator and e-fan (sparks of brushes or other mechanical crap, along with heat from the sparks and other crap... this all equates to less efficiency...

but absolutely 100% if we can cut down the amount of time it's turning that's where we gain efficiency... the efan while off draws NO power, while a mechanical fan that's freewheeling with a disengaged clutch, will still draw a minute amount of power as it is anchored to a moving part (pulley)

 

[JP02XLT]

There are several folks on here that will talk u into keeping stock, however if you will look at where they are from those folks live in northern country, have no idea what we in the heat belt deal with. If they went with an E-fan they probably would not get any efficiency with it because it would hardly ever need to come on, whereas here in the heat belt our fans pretty much run constantly....Notice the word SHROUD that is just as important as the fan itself.

We just had 20+ days with temps above the 90's, That's northern Indiana. My e-fan still hardly ran, unless I had the a/c on or the truck sitting idling. I really dont see a problem with an e-fan over the clutch unit when they are sized and installed correctly. Mine has been on for over 5 years, would not go back to the clutch fan.

JP02XLT

 

[rangerboy92]

you are right about the alternator but again that is another item that only runs at full power when it is needed and i put an e fan on a 1992 ranger with a 2.3 and the stock fan i took off wiehed a good 5 to 10 pounds . the e fan improved the THROTTLE reponse a lot more the than power out put of the engine
the set up i am working on for my new 1996 3.0 is a smaller fan on the ac evapoatorer in front of the radator , this one controlled by a relay off the ac clucth control and a larger fan behind the radator, in the space that the clutch fan is now and controled by a temosat.
remember the ac is a huge heat source and HAS TO have air flow to work proplely

 

[Rearanger]

the set up i am working on for my new 1996 3.0 is a smaller fan on the ac evapoatorer in front of the radator , this one controlled by a relay off the ac clucth control and a larger fan behind the radator, in the space that the clutch fan is now and controled by a temosat.
remember the ac is a huge heat source and HAS TO have air flow to work proplely

That may work as it's the factory set up of another vehicle I have with a clutch fan for cooling behind the rad and a small electric pusher in front of the condenser. However, when my A/C runs and the electric fan is activated I get much better cooling with higher engine revs for the clutch fan. This seems to be the sticking point for electric fans replacing clutch fans - when to run the electric for A/C. I'm not sure if there's enough air flow at speed if the cooling fan is not running to give proper A/C operation. I do know that on my Camry with a dual electric fan set up (one for A/C, one for cooling) it turns out ice air no matter what - but that is a system engineered at the factory and not backyard engineered by tinkerers.