2nd radiator fan

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kevxtx
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2nd radiator fan

Postby kevxtx » Wed Aug 17, 2011 11:13 am

Living in a hot climate I am worried about how long the radiator fan runs for, so I made up a 2nd fan to run at the same time as the main fan, this will allow the cooling system to cool down quicker each time the fan runs.

I bought one of these fans from this guys.

http://www.ebay.com.au/itm/190557264240

Fan spec's

http://www.spalautomotive.co.uk/acatalo ... -62A-S.pdf

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I will finish off the fan this weekend with a coat of black paint & a shroud to direct the air away from the air box & motor.

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Re: 2nd radiator fan

Postby White Knight » Wed Aug 17, 2011 4:24 pm

Nice Kev! I think you're the first to add one to an SMT. There are kits for the Adventures, but nada for the SMT.

What I winder about is why KTM shrouded the radiator in the first place. Would it not be more efficient to leave the back of the rad open?
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Re: 2nd radiator fan

Postby Stu46Duke » Wed Aug 17, 2011 5:15 pm

Oh to need to put an extra fan on. I was thinking of strapping a hairdryer to mine to warm it up enough. Typical british summers!
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Re: 2nd radiator fan

Postby kevxtx » Wed Aug 17, 2011 10:49 pm

The SMT/SMR shroud does not cover the whole radiator, about 20% is uncovered so it does have a 2nd through put besides the main fan at low speeds, also with the louvers removed & the 2nd fan in place it will allow more air through the radiator shroud at lower speeds. You won't be able to fit the 5" fan there is not enough space, there is just enough space to fit the 4" fan.

I decided to leave the KTM shroud on as I would have had to make 2 fan brackets & that looked like to much work, you can also pull more air volume across the radiator core with a shroud.

I have no concerns with the cooling system while riding, it is the stop start conditions I was worried about, my fan in traffic just run & runs & runs, hopefully this will help the cooling system recover quicker.

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Re: 2nd radiator fan

Postby dflowers » Mon Jun 04, 2012 5:43 am

Wondering if the added fan was effective? I am now riding my bike in warmer temps and the single fan runs all the time. I have the cooler thermostat installed so that is one reason the fan runs so much.

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Re: 2nd radiator fan

Postby jgiachino » Mon Jun 04, 2012 7:10 am

looking forward to feedback on how it works as well.....here in Phoenix it's starting to get > 105* and at the stop lights it's just to hot to let sit there idling...i actually shut the bike off at the longer lights.....if the second fan works i'll give er a try...not getting any cooler anytime soon...
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Re: 2nd radiator fan

Postby kevxtx » Mon Jun 04, 2012 9:30 am

They work well, the fans still run at the correct time they just run for a shorter period.

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Re: 2nd radiator fan

Postby dflowers » Mon Jun 04, 2012 7:39 pm

Thanks! I just ordered that fan you specified and will do an installation soon.

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Re: 2nd radiator fan

Postby hardright » Fri Jan 24, 2014 11:27 am

Hi Kev, nice mod. What is the difference between the SPAL 62A and 62S? Would like to do the same mod on my bike.

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Re: 2nd radiator fan

Postby kevxtx » Fri Jan 24, 2014 11:46 am

I used a VA32-A101-62A, not sure what the differences are they list the same spec's.

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Re: 2nd radiator fan

Postby matejs » Fri Jan 24, 2014 2:34 pm

hardright wrote:Hi Kev, nice mod. What is the difference between the SPAL 62A and 62S? Would like to do the same mod on my bike.


I assume that the
62A model is Aspirante (suction) type
62S model is Soffiante (blowing) type.

br

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Re: 2nd radiator fan

Postby kevxtx » Fri Jan 24, 2014 7:51 pm

I think you right mate.

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Re: 2nd radiator fan

Postby hardright » Sat Jan 25, 2014 3:16 pm

Thanks much guys for the clarification on the SPAL specs. So for this project, should it be sucking or blowing?

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Re: 2nd radiator fan

Postby Mikeylikesit » Sat Jan 25, 2014 7:25 pm

the smt fan sucks air through the radiator and shroud. the 4" SPAL 62A is the sucking model as kevxtx specifies in this thread. I have one here that I was going to install a while back, but have decided to get a new fan shroud from KTM ($20) so I can take my time with the 4" fan install and minimize downtime!

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Re: 2nd radiator fan

Postby kevxtx » Sat Jan 25, 2014 10:38 pm

The fan mod is not a mod that can be rushed, you need to position the 2nd fan in the bike to get the correct alignment to clear everything. I also bought a second shroud to fit the fan to as shown in the photo's @ this link viewtopic.php?f=13&t=5414.

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Re: 2nd radiator fan

Postby Bermit » Tue May 20, 2014 10:54 am

Hello,

I found a link to your mod book on the net and started reading.. Impressive !!

about the 2nd fan, I was wondering about the "deflector" you place behind the 2nd fan. Where did you find this one ?
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thanks

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Re: 2nd radiator fan

Postby kevxtx » Tue May 20, 2014 11:10 am

Glad you found some interest in my mod book.

It is very hard to fit the 2nd fan deflector when installing the fans, it will work fine without it, it is the same one that is on the right side turn around & fitted to the second fan.

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Re: 2nd radiator fan

Postby Bermit » Tue May 20, 2014 12:45 pm

Your mod book is definitely very interesting. For sure, I won't do all the things you did, but collecting so many information in one document, making it public is great !
my only suggestion about your book would be to place a link (when possible) to the forum topic of the mod... ;)

Btw, regarding the second fan i understand that :
- fitting the second fan will require some time / efforts to find the precise place to fix it to the radiator shroud
- we can save time and money without having a second fan deflector

other thoughts:
- do you think we could change the stock fan by a bigger one or a more powerful one ? have you investigated this option ?
- and then, do you have the SPAL references of the stock fan ? can't read it on your pictures, maybe you could read it on the original "full size" pics ;)

all this because I really care about the "heat" thing on my smt. I read in many (french) forums that de-catalyzed and without SAS/SLS the system will heat less... my SMT is fitted with full Akra EVO line (titan, no cata), no SAS, with the AKRA map, but it still heats like hell when riding in city ... ;)
your mod is defintely on my todo ! (could be second or improved fan ;))

regards

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Re: 2nd radiator fan

Postby AndyW » Thu Sep 18, 2014 1:25 am

Anyone found an alternative (read cheaper! lol) fan?......Googled with no luck ;-(

Anyone tried products such as Water Wetter?
http://www.redlineoil-europe.com/coolan ... lant_00027
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Re: 2nd radiator fan

Postby AndyW » Tue Sep 23, 2014 4:47 pm

AndyW wrote:Anyone found an alternative (read cheaper! lol) fan?......Googled with no luck ;-(

Anyone tried products such as Water Wetter?
http://www.redlineoil-europe.com/coolan ... lant_00027


Nobody?? :|
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