[Da_Braz]

Has anybody gone about deleting their clutch fan? If so, what did you replace it with and what kind of HP gains did you experience?

I'm basing my question off of This video.

Granted the video is off of a small block 350, but I want to know what kind of gains ill see with my truck

 

[NIsaacs]

In the winter time you can take it off and run without, if you are not towing. Try it and see. I doubt you will see or feel any improvement to make it worth while. There are custom twin electric fan combos with shroud that will fit these trucks. Again not good if you tow. At 28 amps, my guess is the extra draw on the alternator will negate the gain of the fan delete.


https://www.summitracing.com/parts/flx-262/overview/year/1998/make/dodge/model/ram-2500

 

[Stox225]

You could see about a 1 mpg increase. Horsepower gain is negligible. Unless your simply looking for higher hp numbers lol.


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[myother4x4isaCJ7]

At 28 amps, my guess is the extra draw on the alternator will negate the gain of the fan delete.


https://www.summitracing.com/parts/flx-262/overview/year/1998/make/dodge/model/ram-2500

This has been hotly debated on the internet for a long time!!!!! In all reality I believe this 100 percent!!!!! One of the laws of physics is energy cannot be created or destroyed, electric fans are not free energy..... also when your mechanical clutch fan is working properly there is very little power loss until it kicks in, but at that time what is more important? Engine cooling or a few H.P.

 

[Da_Braz]

Sounds like too much effort for too little gains, I appreciate the input!

 

[Destroked 450]

Good choice!

 

[CTDbrad]

I'm very happy with my clutch fan delete. I used a relay, an adjustable thermostat and soldered and heat shrink connectors. Less weight, faster warm-ups, easier access to work around the front of the engine and I think it gives small HP and MPG gains. The fan rarely runs...a little in the summer, almost never in the winter. A 16" high flow fan is only about $35...the conversion is definitely worth it to me. Heavy towing ? I havn't tried it, but I would, just to see...

 

[dauntless89]

Got that t-shirt:

https://www.cumminsforum.com/forum/94-98-powertrain/1329057-volvo-electric-fan-writeup.html

 

[GAmes]

You wouldn't get across town in a TX summer with the AC on with that fan. Towing? Forget it. Not even in the winter.

 

[dauntless89]

I'd have to concur. My setup is quite a bit more robust than that, and it certainly has it's limitations.

 

[myother4x4isaCJ7]

You wouldn't get across town in a TX summer with the AC on with that fan. Towing? Forget it. Not even in the winter.

Also in my experience vibration from the fan will put holes in the radiator over time from those stupid zip mounts. Something to watch out for.

 

[Gator1]

A couple things to consider. I run a bigger all aluminum radiator and live in the desert heat...Sometimes in excess of 120+ heat. My clutch fan never kicks in. I've only heard it one time while towing a grossly overloaded 35' toy hauler on a 127 deg day up I-15 and it came on once. I also have a high capacity alternator so I'm considering doing this since I really don't feel I need a fan at all. I will say if I towed heavy a lot or frequently I might not do it, but I have no need to tow heavy anymore except a bumper pull trailer or a boat.

 

[GAmes]

Just because you don't hear it doesn't mean it isn't moving a lot of air. If the fan clutch doesn't lock up at high temps it could be faulty. I have an aftermarket radiator, four row. Driving around town with the AC on the clutch will engage enough to hear if I'm stopped at a long red light.

 

[Gator1]

Just because you don't hear it doesn't mean it isn't moving a lot of air. If the fan clutch doesn't lock up at high temps it could be faulty. I have an aftermarket radiator, four row. Driving around town with the AC on the clutch will engage enough to hear if I'm stopped at a long red light.

True, it's always turning. But when it locks up it roars! I've experimented by unplugging it so it doesn't turn at all and it did get warm in town but not overheating. I also removed my trans cooler to a new location so it's not blowing 200 deg air into the radiator. Kinda defeating the purpose.

 

[GAmes]

I don't have any experience with an electric fan clutch. It's confusing when non-12 valve owners chime in.

 

[Destroked 450]

Drove big rigs for years with air clutch fans that work similar to todays electronically engaged fans on newer diesel pickups.
The fans didn't kick on much unless you where pulling hard, but where I noticed them cycling the most was in stop and go traffic with the AC on.
You have to have air moving across the condenser for the AC to work properly, a mechanical clutch fan will move some air even when it's coasting.
For electric fans the system needs to be wired to the high pressure switch as well as a temperature control device.

 

[alanack6795]

Some air clutches had a toggle switches to override the thermostat and kick the fan on.

 

[TTFullTimer]

I want just the opposite. I want to pin whatever is slipping in that dadgum fan. I want it spinning full up all the time. Has anyone ever bolted one to get full fan on? I tow heavy all the time and only live where it is warm. Go where the weather suits my clothes.

 

[dauntless89]

At rated RPM, the fan draws over 25 horsepower. That's a lot of parasitic load to commit yourself to all the time.

 

[myother4x4isaCJ7]

At rated RPM, the fan draws over 25 horsepower. That's a lot of parasitic load to commit yourself to all the time.

25 hp when it’s locked up? How about when it’s unlocked?

Edit: read above posts and now I understand why you said that.