I installed the UltraCool fan assisted oil cooler last last year.
My oil temps are far cooler.
I love the fact the fans are cooling my oil now when not moving or in slow traffic.

 

It wasn't until the '07 model year that HD comprehensively leaned out fuel in so many load and rpm ranges. If you have ever seen the fuel maps pre- and post '07 you would see the dramatic differences.

I wouldn't bother with an oil.cooler on a "99" except in unusual riding.conditions.

Carl

 

My 103 came with a fairly stout oil cooler from the factory. At least the MOCO thinks we need one now.

 

On your '99, adding an Oil Cooler would be an option. But one thing to remember. Adding a cooler will make sure the oil temperature is lower when needed. And adding the cooler will increase the amount of oil in your system by about 1/2 Quart. More oil is always a good thing, in my opinion.

Adding a Cooling Fan to the motor is not needed unless you are often stopped in heavy traffic.

 

Do oil coolers even work in stop and go traffic?

 

[deleted double post]

 

Only the one's with fans, ie:Ultracool Reefer

 

I realize I'm a bit OT with this commentary, but for a complete cooling solution I would install an oil cooler as well as a Ward FCS kit to cool the heads. The first is important and IMO essential on all TC engines, but the FCS has done more to control engine temps than anything I've done. Before installing the FCS in June 2012 it would not be out of the question for ET's (engine temp measured by the ECM at the front head) on my SG to climb to >300° with OT's up to about 230° in heavy summer traffic. What's more, when temps did soar upwards there was a long recovery time for OT's to get back to near normal.

Last summer with FCS installed I've seen OT go as high as 225° with ET maxed at 250°, and at these levels only once or twice. FCS kept ET generally around 235-240° even in traffic, and when OT did climb it would recover much more quickly once moving again. Oil flowing inside a 250° head cools down more quickly than one at 300° or more. In summer I usually keep the FCS running at all times, as it works even at highway speeds (up to 70mph).

I personally believe this is a better solution than an oil cooler alone with fan assist. I tried installing fans, albeit smaller than we see with the Jagg (Spal) or Ultracool, and they did help--but OT still climbed in traffic, just not as quickly. I tried this fabrication on two separate occasions and never could keep even the waterproof fans I tried running more than about six months, although I do think the Spal and other application-specific fans on some oil coolers would be more robust. I just don't think they are a good substitute for a conventional non-fan-assisted oil cooler and a well-designed head fan together. Just my 2¢ after battling the heat for almost seven years on this bike.

 

Not while you are in the traffic, but they help remove the heat as soon as you get moving. And with a cooler, there is always the option of fans on the cooler, which would make the cooler effective in traffic.

 

I agree with iClick. Oil cooler AND the FCS fans is the ultimate cooling set-up.