| Author |
Message |
    
Thetable
| | Posted on Tuesday, May 26, 2009 - 03:58 pm: | 
|
quote:Installing a larger oil cooler is not recommended because the stock oil pump would not be able to handle it.
Just curious how a larger oil cooler could affect the pump. The pump is not being asked to pump more volume or higher pressure, you would simply be increasing the capacity of the system. |
Thunderbox
| | Posted on Tuesday, May 26, 2009 - 04:04 pm: |
|
I have ridden mine with 2 up at 95-100mph for a distance of 100 miles. The oil temp never got above 190F. The oil temp and the head temps are definitely not so closely related. This latest ride was only 2 weeks ago and temps were about 75F that day. I don't see how cooling the oil below that temp would be advantagious it may in fact be a bad thing to do. By the way, I am sure the fan was on for the whole trip but with ear plugs and the wind noise I never heard the fan till I road into town. |
Alchemy
| | Posted on Tuesday, May 26, 2009 - 09:22 pm: |
|
I thought the fan had to do with the rear cylinder temperature which is related to the fuel rail temperature. Way hot fuel is not so good. The fan pulls heat off the rear cylinder and keeps the fuel rail cooler.
Oil temperature is not really in the picture as much as the fuel rail temperature when it comes to the fan. Or maybe I am missing it somehow. |
Hermit
| | Posted on Tuesday, May 26, 2009 - 10:09 pm: |
|
I have an 06 and my second fan has a little bit of the death rattle and it ran any time it was over 55F and NEVER shut off. I used ECMSpy and raised the Key On Fan On temperature by 20C and made the Key On Fan Off temperature the same. Now the fan actually shuts off after it has turned on. |
Hmartin
| | Posted on Tuesday, May 26, 2009 - 10:17 pm: |
|
Not to drag this thread off topic, but I've gotta back up Froggy. When dealing with pumps, more orifices/passageways = more head loss. Translated, the oil pump will continue to do the same work it's designed to do, but the resulting oil pressure aft of the filter, after it's gone through all the extra cooler fins, would be reduced. Probably not a good thing.
More to the original topic: I, too, thought synthetic oil would keep the fan from running so much, but the only difference I've been able to notice is that the fan shuts off sooner after shutting down.
It's the perpetual seat warmer - a feature! |
Crackhead
| | Posted on Wednesday, May 27, 2009 - 07:15 am: |
|
Martin, I think you are remembering the old style loop oil coolers. The new style stack oil coolers have very low pressure/ volume loss. The more stacks they have the less the volume/ pressure loss the coolers have. Think of it as wiring in parallel instead of series.
A t-stat would regulate the oil flow through or bypassing the oil cooler based on the oil temps.
I though the oil was used for temperature regulation as well as oiling.
So the fan is not for controlling cylinder/ head temperatures but for controlling temps surrounding the head?
It sounds like the oil need to sit in the head longer to suck out more of the heat.
I am guessing HD didn't design the heads to let the oil suck the heat out bc HD riders don't like seeing oil coolers. |
|
