Alarmdoug,

Using Ultracools own data, apples to apples.

HD oil cooler: Head temp-282 degrees/Oil Temp-245 degrees OAT=97 degrees
UltraCool oil cooler: Head temp-279 degrees/Oil temp-235 degrees OAT=95 degrees

This is only a 10 degree difference in oil temperatures between the 2 oil coolers. It's your call as to whether a fan assisted oil cooler is a worthwhile investment. Just to be clear, I'm referring to both a parade fan (cools heads) and a fan assisted oil cooler (cools oil). Two different things. If the Wards fan, or something like it did not exist, I would buy a fan assisted oil cooler. With a parade fan, I can drastically reduce head temperatures (Below 250) while simultaneously reducing oil temps. UltraCools data is quite clear. With only a fan assisted oil cooler, head temps can still climb above 300 degrees, but keep oil temps in the 235 degree range. That's very good. Again, it's your call. For me, I don't really want the extra plumbing and complexity that comes with the fan/oil cooler. I can't comment on the efficiency of the 10 row Jag as I don't own one. Just My 2014 FLHTCU with Stage 1, external breather kit, PowerVision Tune, Wards fans and HD stock oil cooler is all I need.

DJK

 

I have seen some of the data you are referring to over the last year or so, its been a while and maybe it was Ultra's or Wards site, or maybe Jagg too.

I do agree, without question, if one is looking to cool an air cooled engine, buy something to blow air across the heads while not moving. I have seen that data, an oil cooler does not make much difference in the head temps of the engine where Wards fans do.

I also agree about over complicating things, with Wards fans, no reason for an oil cooler, unless of course, like any mod, its something someone wants to do, it certainly wont hurt, like anything, making something bullet proof for all extremes can be fun.

Being I am already working with a bike and OEM oil cooler, as well as all the plumbing is there I will simply upgrade the cooler core and take it from there. Two years in my hot climate I have not over heated, then again I do not sit in much traffic. 4th of July weekend I did get oil temps up to 253 with my stock OEM cooler, stuck in traffic which took about 30 minutes to go 5 miles.

We all know the bikes are made to run no matter what, adding cooling to me is like any other mod, something to increase the enjoyment of the bike. I dont see why some people knock it, any more then any other mod.

But to be clear, if one is truly looking to cool an engine as much as possible, using an oil cooler is more like the tail wagging the dog and the device like Wards fans are the dog wagging the tail.

Im not looking for as much as possible, just a little something more to give me a bit better safety edge at this point and there is no doubt you can feel the engine start running sloppy when it gets real hot.
So I will most likely go with the 10 ROW Jagg, plug and play, disconnect the HD and connect the Jagg. In the future, who knows? Just like any mod, maybe at that point I will throw a fan on it (most likely) and if I really get crazy, for max cooling, a fan to blow air across the heads.

 

Adding a fan to an oil cooler is not going to gain an additional 20-25 degrees cooling. I'm saying on the fan assist cooler I built with a Jagg 10 row 2 pass core and Spal 5.2" puller fan, the differential temp, or the difference in temperature from the inlet port of the heat exchanger to the outlet port of the heat exchanger is 20-25 degrees, so that's how much heat shed wile traveling through the heat exchanger the entire time the oil cooler fan is on, at about 220F pan temp. A non fan assist cooler will have variable cooling performance depending on vehicle speed, all else being equal, a fan assist oil cooler will have max cooling performance regardless of vehicle speed.

 

Thanks for the clarification.



Go to Wards Parts Werks and you can comb through detailed data on this subject. No other site comes close to publishing data on their product. Generally speaking, and it IS general, cool the heads with a parade fan and your oil cooler fan will rarely come on. If I was inclined to **** away $400-$500, I would probably choose the Jagg fan/oil cooler ($550) because it's a 150 CFM puller fan mounted behind the oil cooler. The UltraCool ($400) is a pusher fan that's mounted in the front, so when the fan is off, you have all that hardware blocking the airflow over the oil cooler. I have no idea how the 2 match up, as there is no data on the Jagg site, and limited data on the UltraCool site.

 

Some good posts on this page fabrik8r and djkolp.

Facts are good.
Also glad to see fabrik chose a Jagg core and Spal fan. I cant tell you how many times I almost ordered the fan to throw over the cooler. Spal is a big producer for true automotive and truck cooling fans.

Ill check the wards site again, I do remember some time ago reading it.

Im leaning towards a jagg 10 row without fan for now (I can always add my own)

AND I have my own idea for a fan to blow air over the heads.
In fact I recently bought a blower for that reason but I need to find one more robust.
I also need to get the wiring harness for a 14 Rushmore RK that plugs into the AUX socket under the left side of the bike. (i understand the socket is different from past bikes) so I can just simply flip the "AUX" switch on when stuck in hot conditions to turn on the fan.

Im going to start on this project soon, everything in my life is about finding the time to do it.
I think I will get the jagg 10 row for starters as that will be the fastest. I will buy just the core and simply unhook the HD cooler and hook the Jagg up to the Harley adapter. 9plug and play)
Next work on finding a nice compact fan (or blower) that can take 300 degree heat and ... (ah ha!)