electric fans vs stock fan

[bigsexy7.3]

Im in the process of building a 2.5 truck to pull woth this season and was thinking of doing a set of electric fans instead of the stock one. What are the pros and cons of running electric fans. I wont be towing with it, just pulling and a little bit of driving around town. I know they say you gain hp from it but is it worth the cost. The kit Im looking at says it pushs 4000 cfm. Anyone know what stock flows?

 

[chevota84]

About 10,000 cfm. You can't stick enough electrics on there to move as much as a mechanical. It'd probably be okay as long as you aren't towing, I'm not sure on any actual hp gain #'s.

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[inline6359]

If you go the electric route I have a couple Lincoln mark viii fans I need rid of. Not a plug and play set up like your looking at but just one fan moves 4000 cfm. I cant fit them on my superduty radiator so im gonna see how these 4 14 inch fans do.

 

[CorneliusRox]

I've always read that the stock 12V fan pushes 5000CFMs. If you look at it, it isn't surprising. It's tiny and there is no technology into the fan blades.

I was looking at running old Ford Taurus fan's. Each one has a low setting of 4500CFM and a high setting of 5500CFM, and you can fit two. I was going to use an arduino, a temp probe in the radiator, and a couple relays w/ circuit breakers to make a system that will be much more efficient than stock.
I could even program a three way switch to be off, on, or auto.

If you are looking at newer trucks, the cooling package needs to be a huge mechanical fan to compensate for EGR coolers and being able to tow a 30,000lbs trailer behind you. They say the new Dodge/Cummins cooling package could work as a fan boat because it moves so much air.

 

[bigsexy7.3]

I ended up buyingmy buddy derale fan setup. Where does everyone tao in for the stat

 

[Headcase98002]

Is it a probe that slides in the radiator fins or is it a NPT switch? I'm gonna put mine in the head.

 

[Ghostman]

I drove my truck around for a while with no fan. Never had an overheating issue unless I sat at idle for quite a while it would start to get a little warm. A/C didn't work to well though.

 

[Extended Power]

If you go the electric route I have a couple Lincoln mark viii fans I need rid of. Not a plug and play set up like your looking at but just one fan moves 4000 cfm. I cant fit them on my superduty radiator so im gonna see how these 4 14 inch fans do.

I did the same thing...bought 2 of the Lincoln Mark VIII fans thinking I could run them both on my SD.
I had one mounted dead center, and it was enough to keep the truck cool in the spring...hot summer days, you needed to find a stretch of road to speed up and get the air flowing. (No towing!)

I bought a Flex-a-lite fan system for the 7.3L and got it to work...used it till last fall. Worked without any issues at all.
I needed more room in front of the engine, so off it came, and on went 4 separate 14" fans.

I like being able to look at the engine instead of the fan shroud...like to hear the engine, not the stock fan, and...it looks custom...not stock.

I am currently using one of the Mark VIII fans on my remote mounted trans cooler.