Stock radiator fan vs electric radiator fan

certainly something to ponder. but ill leave it be for now. one comment i can add is , engines are designed to run at certain temps to run effectivitly. If it doesnt get to a certain temp. and stay there i would imagine it would never make it up to the right horse power. or burn off carbon or .... i may be wrong about all that but if its designed to run at 210 then ill bet its most efficient that way.
You're right, the sensors have to be within certain parameters for the ECU to switch to closed loop and actively adjust the fuel air ratio.
 
certainly something to ponder. but ill leave it be for now. one comment i can add is , engines are designed to run at certain temps to run effectivitly. If it doesnt get to a certain temp. and stay there i would imagine it would never make it up to the right horse power. or burn off carbon or .... i may be wrong about all that but if its designed to run at 210 then ill bet its most efficient that way.
Yup, that's why it is a bad idea to run cooler thermostats. The thermostat in the cooling system is very much like the one in your house, when it's too hot it opens up, when it gets cool it closes stopping the flow of coolant through the radiator until it climbs back up again.
 
Yup, that's why it is a bad idea to run cooler thermostats. The thermostat in the cooling system is very much like the one in your house, when it's too hot it opens up, when it gets cool it closes stopping the flow of coolant through the radiator until it climbs back up again.

Totally agree. This is why I always found it amusing that probably over 50% of the internet thinks it's a good idea to run a cooler thermostat.

Like hey, idiots, wake up... If the vehicle manufacturer had any concern at all that the factory thermostat was set at too high of a temperature, they wouldn't have put it in there in the first place.

It's a classic example of how you can't always believe what you read on the internet.
 
Anyone have experience crossing water deep enough to submerge the fan and clutch? Would love to hear the results. Would be worried that just the bottom half entering the water would splash up enough water soak all the electronics and cause problems. At that level of water, you are getting close to the distributor anyway, so that's gonna be an issue too. I say this because Many moons ago, I backed my CJ7 into a lake at a H.S. party and as soon as that fan hit the water I was done! Had to get towed out by a little Toyota pickup, how embarrassing! LOL!
 
Anyone have experience crossing water deep enough to submerge the fan and clutch? Would love to hear the results. Would be worried that just the bottom half entering the water would splash up enough water soak all the electronics and cause problems. At that level of water, you are getting close to the distributor anyway, so that's gonna be an issue too. I say this because Many moons ago, I backed my CJ7 into a lake at a H.S. party and as soon as that fan hit the water I was done! Had to get towed out by a little Toyota pickup, how embarrassing! LOL!

If you're getting water that high, you're going to have far more problems than just the fan and clutch itself, believe me on that.
 
Anyone have experience crossing water deep enough to submerge the fan and clutch? Would love to hear the results. Would be worried that just the bottom half entering the water would splash up enough water soak all the electronics and cause problems. At that level of water, you are getting close to the distributor anyway, so that's gonna be an issue too. I say this because Many moons ago, I backed my CJ7 into a lake at a H.S. party and as soon as that fan hit the water I was done! Had to get towed out by a little Toyota pickup, how embarrassing! LOL!
Just last week I was in deep muddy water up to the edge of the front of the hood, didn't really have an option as a friend needed recovery from that direction (although i didn't expect it to be that deep) In order to back out I was at the rev limiter going back and forth several times as the bottom was soup. I ended up with enough resistance on the fan to toss the belt and once everything was back together and the rad was cleaned a bit (I keep a water/air fire extinguisher for just this sort of thing in the jeep) it started to over heat. I found the fan clutch had been nuked by the resistance of the water. I didn't enter an high engine speed, i crawled in at idle, high rpm didn't happen until I was trying to back out. So yes, deep water can kill a fan clutch, this one wasn't brand new but my jeep doesn't see much mileage as it's a trailer queen these days so I suspect it didn't start off as clapped out. This is with a ford 10 blade fan, and a ford explorer severe duty /w AC clutch.
 
Just last week I was in deep muddy water up to the edge of the front of the hood, didn't really have an option as a friend needed recovery from that direction (although i didn't expect it to be that deep) In order to back out I was at the rev limiter going back and forth several times as the bottom was soup. I ended up with enough resistance on the fan to toss the belt and once everything was back together and the rad was cleaned a bit (I keep a water/air fire extinguisher for just this sort of thing in the jeep) it started to over heat. I found the fan clutch had been nuked by the resistance of the water. I didn't enter an high engine speed, i crawled in at idle, high rpm didn't happen until I was trying to back out. So yes, deep water can kill a fan clutch, this one wasn't brand new but my jeep doesn't see much mileage as it's a trailer queen these days so I suspect it didn't start off as clapped out. This is with a ford 10 blade fan, and a ford explorer severe duty /w AC clutch.
A rare unique circumstance like that wouldn't even come close to making me ever even consider replacing my belt-driven fan with an electric fan. Not to mention the cost of that replacement fan clutch didn't even come close to the cost of installing an electric fan. Besides, I have my doubts that single incident toasted your fan clutch.

The benefits of the serpentine belt-driven fan far outweigh any possible benefits for rare unique circumstances people come up with as justifications.
 
Anytime we talk about water crossings I always think about that old Pro Trax video. (Video linked at the water crossings time stamp) Some good advice, all be it a little long winded at times.

 
Is it really an issue or is it just an internet myth? I can't really see what it would hurt unless you entered the water while the clutch was locked up at near WOT. I have no practical knowledge though, any water that deep around these parts is moving fast enough to take you with it.
I have been under my hood in water for a good 20ft wot for sure and nothing broke in the cooling system maybe because my fan is all metal it can’t bend into radiator or whatever y’all say will happen in water. My 4cyl don’t got a lot of power so in water I go petal to the metal and I’ve only accidentally gone that deep cause I don’t have a snorkel but I’ve drove up to the headlights driving in a lake all the time when I first got my jeep and the only thing that broke was electric sensors and relays a month later. And the door seals held perfectly beside back door leaked a bit.
 
My last jeep was a 95 yj with 4cyl, did a chevy 5.7 swap , ran the stock yj radiator for over a year and it never got over 195 , spent good money on an aluminum v8 conversion radiator ,it still ran 195, it just looked cooler under the hood.
 
Well HMMWV's have electric fans, and I know that has nothing to do with fuel economy or HP.
I wouldn't think it was an internet myth when the military takes precautions against it. Though I have to assume most tj owners will never do deep water fording like we do in the Marine Corps. Haha.
Actually the cooling fans on the HUMMV when I was in were hydraulic and we're plastic.... If you entered the water with fan on it would break off the blades