I can't think of any other air cooled motor producing 40-50 hp per cylinder on this planet that isn't engineered with an oil cooler. I can't even think of an air cooled motor producing over 10 hp per cylinder that doesn't include an oil cooler. In the case of air cooled automotive, they run coolers and fans inside of shrouding to direct the flow across the cooling fins. In the case of aircraft engines, they also use coolers (w/fan) and shrouding and never sit in traffic.

In terms of coolers being a good investment, it appears that more then 99.9% of the engineers agree that they are not only a good investment but are absolutely necessary on air cooled engines. Your only choice is, which engineers to listen to. (Pretty easy choice for me at least).

I am not real sure but I wouldn't think that simply looking at the change in the oil temp at the point of reservoir would indicate anything meaningful whatsoever if you consider that a "less heat soaked oil" is or should be collecting or transfering and pulling back more heat to that reservoir. I would think that to measure the effect correctly would include measuring temps of different components of the engine not the oil itself.

In terms of cost, I don't know that off hand but, I again would direct your attention to aircraft and automotive engineer's opinions. They seem to agree that it don't matter what it costs because the motor will be junk without it. Having said that, I think everyone can agree that the quickest way for an engineer to find himself "standing outside the gate looking in" is to include something in a design that isn't absolutely necessary. The fact that those other 99.9% of engineers that insist on coolers are still employed makes the whole issue self evident huh?

 

07 and newer YES. The harley prem works good.

 

I don't have a Blenn-Air, but would like to, sent them a question if it would fit with lowers!

Presently running the H-D Premium.

I bet they work better then they look,and are nice looking too.

 

Think of it this way, most autos now have electric fans either in front or behind the radiator. Going down the highway, the fan does not run as there is enough moving air to remove the heat from the radiator. Same for a HD oil cooler, moving it will lowerthe engine temps due to airflow. Stopped, the fan on the car now runs, moving air across the radiator to help cool. For a HD, there is no fan and therefore the oil cooler is ineffective at slow speeds or stop and go traffic. Do I run one, yes, as going down the road engine temps are maintained at a lower level. Does it help in stop and go traffic - no, no air flow, no cooling. Will it work with fairing lowers- yes.

 

yes they work. I would like to see someone put a tiny fan on the cooler that way the cooler would would work in traffic

 

I suppose if you ride in a lot of parades, you might want a fan. Personally, most of my riding is in 5th gear. I've had a cooler on every bike I've owned for over thirty years.

 

Anyone have a problem with debris coming off the front wheel and damaging the cooler? It seems to be located in a susceptible area for damage. Thanks

 

Idont do alot of parades butIdo ride in alot of traffic from time to time.

 

I replaced my front fender with a Fatboy front which exposed the cooler even more, and have had no issues from debris other than some bent fins.

 

This one is made by Lenale fan is nice but the horn that comes with the kit is almost worthless recomemnd you just relocate factory horn. If you want other pictures or longterm test just give me a yell.
219 dollars 20 minutes to install. [IMG]local://upfiles/52318/7A26D7BAC0CF4279A900E7DDB9F4BFD2.jpg[/IMG]

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