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Old 01-22-2013, 04:26 PM   #31
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so things just got a little more interesting...

Yeahbaby graciously donated an RT-P fan shroud to the cause. I'll be test fitting this later this week. looks like it will take some trimming to work, but if it can be made to fit, will allow a larger fan to be utilized.

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Old 01-22-2013, 04:37 PM   #32
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will that fan not block air when you are actually riding above 10mph though?
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Old 01-22-2013, 05:39 PM   #33
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will that fan not block air when you are actually riding above 10mph though?
Which one? The RT-P setup is very similar to the cowlings used on pretty much any car or motorcycle radiator. The small fan covers the middle 1/2 of the cooler, leaving a 1/4 or so on each side open, plug air can still go through the fan housing when the fan is off.
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Old 01-22-2013, 06:06 PM   #34
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but the fan does present an obstruction to air while moving, as compared to a non fan path.

it is only helpful when standing still or moving very slowly right?
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Old 01-22-2013, 06:51 PM   #35
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The fan and housing does restrict some but nothing to worry about. In motion the fan rotates so air can flow. I don't think it will be an issue but the area under an RT is much more confined than a GS. The fan cools a RT-P at a stand still while idling pretty damm well.
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Old 01-22-2013, 08:34 PM   #36
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the fan moving , while the bike is in motion, is still a detriment to the flow and cooling in my opinion

show me your temps and how the fan improves them and I will understand I guess.



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The fan and housing does restrict some but nothing to worry about. In motion the fan rotates so air can flow. I don't think it will be an issue but the area under an RT is much more confined than a GS. The fan cools a RT-P at a stand still while idling pretty damm well.
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Old 01-23-2013, 03:43 AM   #37
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Originally Posted by mouthfulloflake View Post
the fan moving , while the bike is in motion, is still a detriment to the flow and cooling in my opinion

show me your temps and how the fan improves them and I will understand I guess.


Yeah, you are 100% correct. A fan with a cowling snuggled up to the downstream side of the rad has to reduce the airflow to some degree.

The question is how much airflow reduction can the system absorb without comprimising it? I think a hell of a lot. She'll still run half caked with mud ie. 50% blocked. BMW also installs the fan on the police models of the 1200 to cool the pig when there is no flow over the rad.

I think it's fair to say the system will handle the small airflow reduction that occurs while in motion quite easily. It's all about cooling the pig when there is no airflow.
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Old 01-23-2013, 05:39 AM   #38
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It's all about cooling the pig when there is no airflow.
Bingo.

I've idled through towns when it's 104*+ with no issues. Now that might not be hot for people outside of Oregon, but for me, that's quite hot. The only time I've had a temp issue on the bike is with the garage door down, bike running, and aligning the low beam to a mark on the door - the bikes temp gauge moved to the upper carrot - and in a rather short time. So I put on that SPAL fan.

Originally when I looked into this for my '11 GSA I didn't think a RTP version fan with cowling would fit in the oil cooler region. There just isn't enough room for all of it. Now removing that shroud and making a custom bracket it should work in my instance.

One thing I've read that is pertinent to this, is that a couple of people wired the fan from the battery (not a switched source) with a thermostat and the fan continued to run with the bike shut down. So I went with a lighted LED switch.

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Old 01-31-2013, 02:55 PM   #39
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Bump to keep thread alive. I am very interested in this modification. I overheated my 1200 GSA last weekend and need a fix.
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Old 01-31-2013, 07:22 PM   #40
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Bump to keep thread alive. I am very interested in this modification. I overheated my 1200 GSA last weekend and need a fix.
No worries. Haven't had much time to do anything with it yet. Hopefully this weekend. Got the switch in i'll be using this week.
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Old 02-17-2013, 02:24 PM   #41
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Alright, time for an update.

First off, i tried. I really did, but i don't think the RT-P cooler shroud is doing to work well or at all. My plan was to get the shroud in there, then buy a more conventional fan to fit inside it.

I've heard someone else has modified it to work on the bike, but i could not find any pictures of it online. My personal goal was to no modify the existing bike in order to mount the fan. I trimmed down the shroud and was able to get to fit reasonably well behind the oil cooler, but there were still large gaps all the way around and it extended well below the oil cooler and even the light bar. The main issue are the metal supports for the front fairing. The center one that runs down the middle interferes with the upper part of the fan shroud and the round cross bar it connects with actually sits a decent bit below the top of the oil cooler. I wasn't able to get a good picture showing what i mean, but below is what i have.

The top piece is the unmolested shroud yeahbaby sent:



Hacked away, this is how the shroud currently looks:


The cross member here is what causes the biggest headache. I'm sure it could be cut and modified, but that isn't something i am willing to do.


Hard to see from this angle, but the headache piece above connects with the round horizontal bar in the pic below. Can't really see it from the pic, but that bar sits directly behind the top 1/4 or so of the oil cooler.



So, all is not lost.

I went head and decided to try experimenting with ways to mount the PC fan. So far it sits in with just 4 zip ties. Surprisingly, it is very secure. The top 2 zip ties are around the above round support. The bottom 2 are around the light bar. No wiring ran yet. The picture is deceiving, the fan sits pretty close to the oil cooler, but as you can see it does extend a little below the oil cooler though. This will be the initial test.

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Old 02-17-2013, 02:50 PM   #42
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Not sure if anyone has seen Dylan S. 1150 GSA in the thread below but he has two small fans mounted in front of the oil cooler. As he's on an extended world trip and has crossed through many hot countries it would be interesting to hear how these two fans affect cooling.

The thread is here http://advrider.com/forums/showthread.php?t=851230

There are numerous images on the thread where the two fans can be seen, Page 6 has a couple of images that show the two fans quite well (not sure how to post an image directly into this thread so you'll have to take a look in the thread to see it if interested).

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Old 02-17-2013, 03:12 PM   #43
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Not sure if anyone has seen Dylan S. 1150 GSA in the thread below but he has two small fans mounted in front of the oil cooler. As he's on an extended world trip and has crossed through many hot countries it would be interesting to hear how these two fans affect cooling.

The thread is here http://advrider.com/forums/showthread.php?t=851230

There are numerous images on the thread where the two fans can be seen, Page 6 has a couple of images that show the two fans quite well (not sure how to post an image directly into this thread so you'll have to take a look in the thread to see it if interested).
I see. I'd be interested to hear how well the fans did in front of the cooler.

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Old 02-18-2013, 04:02 PM   #44
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I see. I'd be interested to hear how well the fans did in front of the cooler.
Well got a reply from Dylan regarding his 2 x fan mod in front of the oil cooler

He said" I made those fans with cheap computer ventilators. I bought them in Thailand almost a year ago. I turn them on by flicking a manual switch on my dashboard when I see the temperature is getting high. When there's a traffic jam, I turn them on anyways. Until I made these fans, riding in traffic congestion was a real hassle. Also when you are stuck in sand and don't have much speed, they help a lot and I never had any overheating issues"

Sounds like it might be easier to mount in front of the oil cooler than in the restricted space behind (if your so inclined)
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Old 02-18-2013, 04:49 PM   #45
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Well got a reply from Dylan regarding his 2 x fan mod in front of the oil cooler

He said" I made those fans with cheap computer ventilators. I bought them in Thailand almost a year ago. I turn them on by flicking a manual switch on my dashboard when I see the temperature is getting high. When there's a traffic jam, I turn them on anyways. Until I made these fans, riding in traffic congestion was a real hassle. Also when you are stuck in sand and don't have much speed, they help a lot and I never had any overheating issues"

Sounds like it might be easier to mount in front of the oil cooler than in the restricted space behind (if your so inclined)

interesting. I'd be worried about them blocking the airflow while moving at higher speeds, getting hit by rocks, etc. Guess i'll have to see what happens.
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