Lil Dog

Valid point Jim. Hp is Hp no matter if its belt or electric to get the air moving. The part that interests me is that they only run when they are activated, not spinning all the time. The viscous clutch doesn't totally disengage the fan and it does draw power all the time. In the winter you really notice it.

Racing_Joe66

26 amps @ 60%
36 amps @ 100%

ure gonna c a HP gain of 20-30 HP. i would say closer to 30. now with having the electric fans u only uses 1/3-1/2 HP to run them.

Lil Dog

I stand corrected.. After doing the math your right. 36 amps is only about 1/2 Hp. Hmm.. Is the stock fan that inefficient?

Racing_Joe66

the stock fan does a good job, but robs power n mileage.

Racing_Joe66

ok guys. i just crossed the scales and come in at 17,250 pounds so i think going from CO to NC with this much wieght should put the fans to the test. will let u guys know how it works. so far 200 miles and not seen over 185

Racing_Joe66

ok guys. we have been in 90* weather almost all day and have had some very very big hills and the engine temp only seen 190* and the trans temp was 200*.

so far so good.

next week i will be pulling my 45' trailer with 2 cars and an engine and 1 3 wheeler in it to texas. so will be putting them to the test again.

Marine

What were your temps before the fan change?
How are you only running 2-4 # boost at highway speeds pulling a big trailer?
Just some questions I have.
Thanks!

Racing_Joe66

my temps before the change were 180-190 as well.
my boost 2-4 was pulling a 19' boat. not the trailer. the trailer we are running 8-12 #'s of boost.

Marine

But even pulling the boat....
My boost numbers doing that speed empty are between 5-10.

Nevermind, I Just noticed that you have a 12 valve lol.

I am interested in the fans too, but 550.00 is too much for me.

Racing_Joe66

i will tell u so far the fans have been a good investment!!! so far on this trip they are half paid for!! and by next week they will have paid for themselves in full!!!

but will find out next week if they will work with a real heavy load or not!!

dozer12216

How have they paid for themselves? Don't tell me you are getting 5 MPG better. Any difference in fuel milage will be superfical or within a nominal varation. I can get seven mpg difference driving the same 600 mile road and same speeds. Even varations in fuel will make a difference.

Racing_Joe66

dozer12216 y don't u buy them n do a cross country trip to test them out!!! and u let us know what u think. i have driven my truck all over the US in the past year. i have been to all continental 48 states with this truck n have logged over 200,000 miles, so i deff know what my truck gets for mileage n where under what conditions i am pulling. i am in your kneck of the woods now, just got onto 52 south from 74 south headed for burllington, nc.

2500

WOW... what great info!

thanks for sharing... been wanting to switch to electric fans... also would like to get my engine temps up to 195 range for more efficient operation. that 1-2 mpg increase sounds like the ticket!

thinking my 97 12v wouldn't even need fans to kick in for most short runs.

Racing_Joe66

i will post my mileage findings n yesterdays n todays temps in just a bit.

97 D-Tec

If you read where he said he gained 1.5 to 2 mpg then you would have figured it out.. and it makes sense because its taking less horsepower away from the motor which means the engine doesnt have to work as hard=mpg savings and even if it was 1/4 of a mpg or 1/2 a mpg gain it still adds up and its still going to pay for itself