Every one wants more MPG....Read this and see how!
Legend
Joined: Jul 2011
Posts: 8,259
Likes: 4
From: Austin, TX
...and you may not, and most that do, may not see it immediately after the fan swap.
It was just something to consider. If someone is calculating the savings yearly that they see at the pump and they have to replace an alternator in the next two years...how much of that MPG savings were wiped out?
Power and MPG are one thing. Doing it because of those savings can be tricky if you don't calculate things in and someone trying to save a few pennies here and there needs to know that it'll take a LONG time to see savings enough to have paid for the swap to begin with, and then consider an item like an alternator may need to be replaced too.
It was just something to consider. If someone is calculating the savings yearly that they see at the pump and they have to replace an alternator in the next two years...how much of that MPG savings were wiped out?
Power and MPG are one thing. Doing it because of those savings can be tricky if you don't calculate things in and someone trying to save a few pennies here and there needs to know that it'll take a LONG time to see savings enough to have paid for the swap to begin with, and then consider an item like an alternator may need to be replaced too.
The e-fan has been on my Jag for about 6 years. I have owned it since 2002, and not changed alternator. If it would have been a problem, I would think I would have seen something by now. IF the electrical load is not over the rated capacity of alternator, or casusing alt to run at its capacity in excess of it's duty rating and the battery is good (I know, "if" is a big word here) but with many years of electrical engineering experience I can assure one that the e-fan will not cause premature alt failure. They are not like the old carbon brush generators.
On another note- I did not install the efan on Jag for mileage. i did it as the OEM fan gernaded on me on I40 in the middle of the Painted Desert one Sunday evening. This is when I learne dtaht after a number of years, the fan has a flaw....it like to let go and send chards through the radiator and the underside of the hood - well, at 120mph anyway. I was determined to NOT let that happen again! Ever rebuild a Jag engine? Makes a Magnum look inexpensive!
Last edited by gdstock; Jun 14, 2012 at 10:39 PM.
Legend
Joined: Jun 2009
Posts: 8,025
Likes: 72
From: orangeville ontario
someone already dyno'd the differences and it is almost non existent.
Record Breaker
Joined: Mar 2009
Posts: 2,181
Likes: 3
From: Battle Ground WA
As I've said before, the big difference is on hot days, when the clutch fan would be locked up, at any other time the difference is nill. A better dyno comparison would be bolt the fan solid somehow and see how much of a difference there is.
Rookie
Joined: May 2012
Posts: 71
Likes: 0
I posted about a year ago, I added electric fans to my truck. It entailed a little work and figuring things out but all in all it took me about an hour and it paid for itself in under 2 months. The total was about $125 these prices are guesses now I lost the receipts.
Ebay fans were about $75
advanced auto relay harness$25
Varrious wires connectors and splitters $25
After looking on ebay it still costs about the same today.
I removed the fan shroud and removed the fan and fan clutch. I cut the shroud so the sides were seperate to hold the over flow resivore and washer fluid. Installed the fans as per directions.
End result was a solid 2mpg. No power waisted on turning the fan clutch.
It comes up to pennies per mile but it will pay for itself in 5k miles or less.
Ebay fans were about $75
advanced auto relay harness$25
Varrious wires connectors and splitters $25
After looking on ebay it still costs about the same today.
I removed the fan shroud and removed the fan and fan clutch. I cut the shroud so the sides were seperate to hold the over flow resivore and washer fluid. Installed the fans as per directions.
End result was a solid 2mpg. No power waisted on turning the fan clutch.
It comes up to pennies per mile but it will pay for itself in 5k miles or less.
