My truck runs really well and really cool. Rarely gets above 180 even in L.A. traffic. I'm considering putting an electric fan or twin fans on it and getting rid of the parasitic clutch fan. Back in the day, I did this on my Power Wagon and Ramcharger (318 engines) because they ran pretty cool, and when fording water the engine-driven fan just slings water all over the engine compartment and drowns it out. Been left sitting midstream many times before the switch.

So, has anyone done this on their RAM? Would a single fan be enough or would I need a dual setup with such a large engine? I'll be running it with a thermostat control and since I have the 136 amp alternator and an 850 amp battery I should have no problems electrically.

 

I would say with a V10 2 fans! There are a few ppl on here they say you can feel a power gain.

 

the most hp you will gain would be 10-20hp.. but with a 6,000# truck.. you won't even notice it.

 

Not too concerned with horsepower as this thing is plenty strong as is. Was thinking it could help the mpg a little as engine-driven fans are very inefficient. Right now I have about a 330 mile range on a 34 gallon tank. Would like to get it over 360.

 

If it isn't broken....

I've been meaning to get around to this, too much other stuff going on, but I really do want to research the cfm requirements for an electric fan. I realize some are going to say 3000 cfm because it says that on some fan suppliers website, but I think that's crap.

Work in commercial hvac engineering and do legitimate fan testing, and doubt 90% of the numbers thrown around in the aftermarket industry. Mainly because they have no documentation to back up the air flow claims, and won't provide it when you request it.

Have all the equipment to measure the airflow of the factory mechanical fan at idle, need to get off my rear and do it because that would give me a good idea of a baseline for a fan. Have a funny feeling people are spending more then they need to.

 

Wow u should get off yr *** and help us and you out!

 

i put a mark Viii fan on my truck with the 318 and that baby blows some air.....theres a thread on here about it and some others

 

Maybe next weekend. Thought of doing it today actually, since I had the right test equipment in the truck because I had to do a quick bit of work this a.m., but talked myself out of it after reading on here a bit...lol

Did a search on electric fans earlier and read a thread where someone said they might not make it a priority mod again because of noise and a lack of any significant gain with h.p. After reading that, started thinking it might be a waste of time to take it on. While I've heard the statement of how inefficient the factory fan is, wonder why that's thrown around as much as it is. Yeah it robs a bit of h.p., in turn gas mileage...but if it was anything significant, every new truck would come with an electric fan.

 

Well, many newer model cars and small trucks are factory equipped withe electric fans these days, so that says something. On my '79 Power Wagon it was worth about 1.5mpg and a little noticeable boost in power. The real benefit was not drowning out my engine every time I went wheeling through some stream. At freeway speeds you don't even need a fan on a well designed vehicle, so I could see it having real benefits. Even if it only gets me 1 more mpg, that an extra 34 miles a fillup.

 

Why would you talk yr self out of it. I know why u did talk yr self out of it lol.