YDM, is there any 'gaps' in the fan shrouds and the fans? Is there any 'open' or exposed rad fins in the engine bay?

I know with the stock setup, you can't even see the rad fins on the engine side and that shroud is HUGE! I'm sure that helps contribute to the flow, especially when the fan clutch locks in!

My last 2 trips this year over the pass this season, my temps haven't gotten much over 195*... Might have had something to do with the fact that the outside temps were only in the 70* range...

Good luck with the search for that 'perfect' E fan setup! I hope you are able to find something for your needs!

Mitch

 

Yeah, the 8-mile grade coming out of Bishop in to Mammoth is a killer. The ironic thing is that I had an '07 F350 that I traded for the '08 F150. I should have never done that in hindsight. The F350 could effortlessly pull my TT up that grade with no cooling issues whatsoever. The fan noise was quite annoying though...

 

No exposed fins as the e-fan is mounted to the factory shroud. There is however a 1" gap between the fan and the shroud mounting points. But that gap is no more than the original factory fan. I don't think that really contributes to less cooling. The distance from the e-fan blade to the radiator might though, especially in low flow situations.

Here is a pic of how the e-fan is mounted to the shroud:



I may try and move the e-fan closer to the radiator and see if that makes a difference. But experimenting out in the middle of nowhere on a hot day is not something I want to do with my family on a camping trip! So the factory fan is going in for now.

I have ordered a ScanGauge so I can get some data to compare with. Then I'll start experimenting with different setups.

 

I think the gaps between the housing and fan could be a problem. Don't forget the stock setup uses a larger fan with a lot more pitch and can flat pull some cfms. The gap can't be that tight on an engine driven fan to make up for movement of the engine under torque. I think if you seal that gap, it'll be a lot more efficient.

 

You're not getting near as much cooling capacity with one single electric fan as you were with the stock fan...as Windsor said, that stock fan flat moves some air!! When swapping to the electric, you need two to do the job of the stock mechanical fan & shroud combo.