I don't know about the Diesel Power mod, but you won't find an electric fan that can be packaged into the OEM fan envelope with anywhere near the same performance (CFM @ S.P.).

There's no viable reason to remove or replace the stock clutch fan... it only comes on when the engine needs it to (which isn't very often), nothing else can take it's place and still get the job done as well, and even though it DOES require ~ 30HP to turn it "locked" at rated speed - the ECM fuels harder (+ 30HP - imagine that!) so there's no loss of power to the drivetrain...


IMO, the real question is:

Is it worth fooling the ECM into thinking the fan is "locked up"?
I'd design a BOMB for it if there were enough interest!

 

Seriously? The ECU fuels more when the fan is on? Awesome.

Your mod idea is genius. DO EET!

 

What are you guys talking about when you say the fan only runs when the engine gets to a certin temp? My fan runs from when I fire up my truck to when I shut it off? No one elses does this?

 

Turning and running are two diffrent things.

The fan runs on a fluid-activated clutch that engages when the temp reaches a certain point.

The fan will spin freely before then, but it's just freewheeling and not being spun by the engine directly. When the viscous clutch is engaged, it locks the fan to the crank, and now the engine must power it.

A dangerous test that no one would recommend you actually do would be to stick your hand in the fan blade when you first turn the truck on. It should stop easily. With the clutch engaged, your hand will be chopped to bits. Awesome!

You can tell if it's actually running or not by the sound. A fan with its clutch engaged makes a very audible roar, which you will hear over all other engine noises.

 

Yes, +30HP! I almost did this late in 2005, but realized that most of us get as much reasonably-priced power as our trucks can handle from aftermarket fueling already.

This mod could benefit only otherwise bone-stock (fueling-wise) trucks, IMO.

Sure, the fan turns, but it's clutch isn't "locked" - so there's no power behind it... you could hold onto it with your hand while the engine is running, if you were brave (foolish? ) enough to check.

Please don't try this at home folks! (and if you KNOW that you know what you're doing - be very careful...)

 

Well thanks for clearning that up for me, I will take your advice and not stick my hand down there. Mabe i'll put a tree branch down there one day and see if it is realy "locked" in.

So HOV, you said it is a very audiable noise? Mabe what im about to explain is my fan kicking in. From a dead stop, if the truck is hot sometimes I can hear a loud noise comming from under the hood, it almost sound like my air filter is loose and is sucking in to much air(I realy don't know how to describe it that well) but you can deffinetly hear it sometimes. I obvisouly can't hear the fan at cruising speed due to the AFE tq/tube & my silincer ring missing but I guess the only logical thing it could be is the fan kicking in.

 

Hmmm, hard to say from that description. The best way I can explain it is:

Loud roaring like a really noisy straight-cut gear in a transmission. Changes with engine speed. Intermittent.

 

Yea I think you described it a little better then I did. The noise is realy pronounced, it goes away usualy when I go over 5-10mph, it only seems to do this when the engine is hot so that leads me to beleive it's the fan kicking on. To me it realy sounds like it is sucking a tremendous amout of air in, it had me checking the filter to see if it was snug and checking the tube on the turbo housing. Everything was fine though.

I'll just call it a day and say that it's the fan kicking on, im sure thats what it is anyways.

Thanks HOV & XLR8R

 

Sorry i didnt chirp in, i only have internet access every few days where i am at. I read all the posts and some make sense. At idle when i start the truck the fan it does move. It maybe not be engaged but its turning and with it turning its moving air, that air is moving over my radiators thus making my warmup times in the morning longer. The 18,000lbs scared me when i looked at the web page. but i think thats a safe number they had to make for legal reasons. My truck is mainly a daily driver and might tow 6-8k twice a year. I mainly wanted to do this because they said it increased MPG +3 and that is something i do like. I emailed them the other day and they said to check back in a couple of months, they are currently designing one for the 2003+ trucks. As of right now i am stuck with what i have now...we will see what happens as the months roll by.

 

So by my understanding of this thread...NO GO on electric fans on our trucks. Can you guys explain something to me....I plow with my truck and after 1 to 2 hours of commerical lot plowing I'm running 225 F on engine and 210 F on tranny (at least by the gauges). Are these normal ranges? Was going to put electrics on for for the sole purpose of consistant flow regardless of truck speed. Also running a Blizzard speedwing so very little air thru radiator between sites.

 

My understanding is that the fan clutch will kick in due to the air conditioner and that is why you may be hearing the fan roaring before the engine is warmed up.

 

hi

thnaks for the warning not to stick hand in the fan . I found out the hard way ( all is ok) that my fan is directly mounted ( no clutch) .
understanding that EL fan is no good, It also seems overkill to have a coonstant running fan .
Is it possible to install a fan clutch ??

Current :
fixed mounted 27.5" fan
diesel pusher B5.9 12V Cummins 230 hp

thanks

 

With a pusher, you don't have the same airflow as one mounted in the fron and probably NEED that running all the time.

 

i called Flex a Lite awhile back and asked them if they have a kit out for the newer dodge trucks they said no But They are working on a one.