Considering Cooling Fans- Flex

I'm certain that will vary between manufacturer.

I consistently have in mind, a much simpler test. Until recently, I lived in Arkansas. Lots of leaves in the fall and lots of big oak trees in the yard. My driveway was always clean. Mostly because when I started the Fox each morning (to the dismay of some of my closer neighbors), there would be a plume of leaves making haste toward the grassy edges of the driveway.

To this day, I've not seen a similar retreat except from my step father's old Jeep.

Now, if I find an E-fan that will fit into a Fox and has that much excess... I'd probably be interested in that.

Mark 8 fan would be the closest you'll get.

But what I don't understand is that if the focus is spent addressing the airflow through the radiator and thermal heat transfer efficiency, one can make better use of the limited air flow an e fan pulls through the radiator. Going to a huge clutch fan setup makes no sense if the radiator is gunked up and flow is limited through it. Part of the issue is no shroud, so a lot of wasted fan CFM is spent pulling air from alongside the rad, vs through it.

I said this in another post, but I have the same SN95 efan that the OP upgraded from. I know new England weather isn't the hottest in the country, but I've driven around on a few 90 degree days and the fan really doesn't come on until I come to a complete stop. As long as I keep moving, the air passing through the big brass 3-core is enough to keep the temp around 185-190 on its own without a fan. That's why I ask if there is a problem here that could be solved via another method vs looking at the fan. A fan is part of the equation towards keeping a vehicle cool. Another one is effectiveness of the radiator to transfer heat to the air passing through it.