https://blessedperformance.com/blessed-performance-direct-fit-quad-electric-fan-kit-2003-2007-ford-6-0-powerstroke/

Blessed has it 4 fan electric set up. Will be interesting to see some real world data from it. They do claim up to 12k cfm so might be a solution for someone.

 

My first question would be WHO makes the fans and where do they come from.

The only true fan company that I would trust is SPAL, race proven and the ONLY company that provides true test data on every fan they sell and made in ITALY

From google: Proform electric fans, designed for automotive performance, are primarily manufactured in China

Personally I don't think there is anything that will pull more CFM than the stock setup in a shroud.

 

Looks like they did some testing with it apparently towing with good results. They didn't mention length of hill, just 8%.

I would be more concerned about battery draw if running for long periods. Those fans have got to pull a ton of juice.

https://blessedperformance.com/bless...0-powerstroke/

 

We can know (no guessing required), using some basic math, if the electric fans can pull the same quantity of air or not.

Here's an easy to understand way, using real numbers, to see the difference between electric and mechanical fans;
- Its widely known (and shown through dyno testing) that mechanical fans "rob" about five horsepower from the engine. So there is 5hp worth of energy being used to move air with a machinal fan.
- Moving air takes energy, and to move the same quantity of air, it takes the same amount of energy regardless of the source (physics is kinda a bitch like that).
- Energy can be expressed in multiple terms and equivalencies calculated (i.e 1 HP is equal to 745.7 watts).
- So, since we know the mechanical fan consumes 5hp, that's equivalent to 3725.8 watts (we'll round down to 3700 watts to make it easier to read)
- The equation for watts is "Watts= Volts x Amps", rearrange the equation to solve for amps you get "Amps=Watts/ Volts"
- Plug the numbers in (using13.6 volts which is about what a running vehicle alternator should be putting out), you get 272 amps ( 3700 / 13.6= 272)
- So we can conclude that if the electric fans are pulling less that 272 amps combined, they are moving less air than the mechanical fan.

Most electric fans are on what, a 40 amp relay at best. So with four electric fans, best case is 160 amps worth of energy used to pull air (hope the truck's alternator is up to that task),,, the mechanical fan uses the equivalent of 272 amps,,, there is no free lunch in the real world, you want to move air, it takes energy to do that. Electric fans don't have some magical physics cheat code built into them, if they want to move the same amount of air, they would have to consume very close the same amount of energy (some electric fans do have a curved blade on the fan itself that is slightly more efficient, but its not a huge efficiency jump).

So, it would take 7 electric fans, pulling 40 amps each, to match the stock mechanical fan. For a hot rod street truck that's not towing a bunch, the quad electric fans shown above would probably be just fine, but for a heavy towing truck,,, they're not the best choice.
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This is the concerning part:

• Low Amp Start Technology All 4 Fans will only use up to 70AMPS at full draw

17.5 Amps per fan at full throttle running just does not make sense for 4 fans that will pull 12k CFM....pure bull&h*t.

Some SPAL fans rated with that "true" CFM pull twice as much and the in rush amp draw is insane.

Oh well I would never buy it and I feel for the poor sap that does and his truck is sitting on the side of the road with blown head gaskets.

 

There are soft start devices out there that use PWM or mosfets, (for DC loads like these fans, AC loads is a different discussion), to help with the starting current surge, they work and greatly reduce the starting surge, but you can't eliminate it all together.

If someone was really dead-set on running huge electric fans for whatever reason, there is a means to get past the starting surge hurdle.
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For the money, I'll keep the factory setup.

 

Totally understand that part, but the amps drawn on full output and the claimed CFM does not match...that was my point.

 

Oh 100% agree, their math isn't math-ing on CFM to running amp draw.

Like I said earlier, that fan setup would probably be fine for the hot rod street truck driving around on 26 inch wheels with rubber band tires and a smoke stack, but not the best for a truck that's being used as a working vehicle. I'm guessing the target customer is the former.
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Funny thing is they claim to have tested this in real world towing, bought every fan under the amazon CHINA sun and they came up with this.

Bunch of is what I am thinking.

 

Bubble Head's math skills are strong...

 

lol, I was a nuke for a little over 20 years, old habits I suppose.
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All interesting discussions, personally I would not do it either. As far as I would go would be to replace my snow plow clutch with a standard clutch since I have tune the fan parameters to come on early, 202 for low 212 for high.

 

12,000cfm is 3,000cfm per fan, which isn't that much. The picture shows that there are two different sizes on the shroud; either a 14 or 16" and, I dunno, a 12 or 14". The specs are on ProForm's website for the brushless ones. https://www.proformparts.com/brushless

I haven't had my truck long enough to monitor fan operation under varied conditions, so I have to wonder: is the stock fan at minimal engagement or completely freewheeling on flat ground at highway speed? From what I have gathered about electric fans and my own decision not to bother converting to them in other vehicles, any small gains in mileage or power are from them being completely off during cruise conditions and from being less powerful than a mechanical fan in actual use.

 

I just installed an external oil cooler on my F550 6.0 and was thinking about adding two fans. Seems better than messing with the mechanical fan. I also added a new, bigger Mishimoto aluminum radiator and a new water pump with a bigger impeller. Those seem like better investments