Where are you getting the figure of 20% from?
Wasserhead achilles heel
- Thread starter OZGSer
- Start date
exactly my thougts
Your calculations seem to be based on Square sum of area of the guard.
Thats not how airflow efficiency is calculated.
For example if you put a round pole in front of an intake which is 20% of the intake area , it might actually increase the volume of air being transfered.
You need to stop bogus statements based on false factors being calculated.
Radiator guards are likely to have very little, if any effects on cooling efficiency.
Of course if you put anything in path of the airflow it will have an effect but dramatasing like that , with guessed possibilities is just overreacting to non issue.
how silly you guys will feel when BMW will release its own guards for GSA?
If I'd just spent the best part of £14 large on a Wasserboxer I'd want the radiator covers on there from day 1 
jonnyp
Registered user
So here is a bit of a twist.
BMW Australia advised me that there are no replacement radiators in the country and BMW Germany came back with no ETA on spare radiators. My dealer tried to order one and they said none available until further notice.
So my only option at the moment is to have it repaired by the radiator place and have it pressure tested. Sent them pictures and they said no problems they will be able to repair it and have it back to me by Friday which is good news
On a separate note: I had radiator guards on all my bikes for years. My last one is on a Yamaha VMAX I own that has 2 front radiators in the line of fire. The bike is 100% water cooled and it makes over 200HP at the rear wheel with 180nm of torque around 4500 rpm. Bike never overheated and temperature was never an issue in over 31,000 kms travelled and most over 36c days
Yamaha in fact has a standard plastic radiator protectors on both top and bottom radiators from factory. In addition I still fitted the ozzimoto guards and never had a heating issue in the 5 years of ownership.
So I am not worried about the air flow. I am more pissed at myself for not fitting any before I went onto this trip. I was going to , but the time just got away from me and I though what would be the odds, I'll do it when I get back. Serves me right. I will be doing it when I get back I guess now
First photos show the Radiator Guard in Red, but it was too bling for me and then I had it re-anodised in black in subsequent current image
Daft question,,,,, how long did the conti attacks last on the back of that thing...
Ps awesome bike
GC6269
Registered user
Someone mentioned www.mikesgrilles.com so I enquired about availability and got the following reply:
Hi Graham,
Thank you for your inquiry and it is good to hear from you again.
I am always looking to extend my range where there may a demand. If you would like me to supply a custom grille as a prototype I would be happy to so free of charge in return for some feedback and pictures of the installation. All you would need to do is to supply some dimensions for me to work to and I will give you the necessary info on how to do that.
Let me know if you feel like giving it a try.
Best regards
Mike
Now, all well and good but I don't get my bike for another fortnight. If anyone is interested, give Mike a shout. Having had his product on my Tuono I can vouch for them. The main thing for me was how discreet they were.
Anyway, if no one runs with it, I'll contact him when I get mine.
Hi Graham,
Thank you for your inquiry and it is good to hear from you again.
I am always looking to extend my range where there may a demand. If you would like me to supply a custom grille as a prototype I would be happy to so free of charge in return for some feedback and pictures of the installation. All you would need to do is to supply some dimensions for me to work to and I will give you the necessary info on how to do that.
Let me know if you feel like giving it a try.
Best regards
Mike
Now, all well and good but I don't get my bike for another fortnight. If anyone is interested, give Mike a shout. Having had his product on my Tuono I can vouch for them. The main thing for me was how discreet they were.
Anyway, if no one runs with it, I'll contact him when I get mine.
That depends on the amount of air the fan is capable of moving. The rad is designed to move far more air than the fan at speed. The fan therfore shifts far less air when the bike is stationary, but it's enough to prevent overheating. I'll stick with it being a non issue, whereas a holed rad=big issue!
Think this might answer some questions regarding over heating with radguards
http://www.youtube.com/watch?v=A3DABMfIEK8
http://www.youtube.com/watch?v=A3DABMfIEK8
The 20% was just an estimate of the reduction in exposed area - I DO realise that it is not the whole story with air flow - the only way of knowing the full effect is to do some experiments, however if the 'grill' is placed very close to or in contact with the radiator then I would expect it to reduce the airflow.
GC6269
Registered user
They need to roll them out asap as only available in Australia at the moment
Good news, Rad Guards have now opened them up to the UK, you can order direct from the site.
So we'll have blown motors over here too
Rad Guards
http://www.radguard.com.au/products/bmw-r1200gs-2013-radiator-guards-black.html
However you need to send the original plastic rad covers.
http://www.radguard.com.au/products/bmw-r1200gs-2013-radiator-guards-black.html
However you need to send the original plastic rad covers.
Just heard back from Mike of Mikes Grilles, and he is talking to a WC GS Owner, a few posts up from this, and may well be making some soon.
His products are great, I have had them on 3 previous Triumphs and it saved my S3's oil cooler on more than one occasion. They are simple, effective, discreet and most of all, they work
His products are great, I have had them on 3 previous Triumphs and it saved my S3's oil cooler on more than one occasion. They are simple, effective, discreet and most of all, they work
I had a set of Mikes Grilles on my 1050 Speed Triple
They are held in place with either black cable ties or lock wire
They are held in place with either black cable ties or lock wire
GC6269
Registered user
^ Proper!
I got bored
What was the outcome
The rad covers make no difference in the running temp.
Yeah but it was a flawed test, done at a standstill, at tick over with a fan simulating airflow - a better test would be to compare the coolant temperature with and without the grill when running uphill under load in a high ambient temperature.
I had a set of Mikes Grilles on my 1050 Speed Triple
They are held in place with either black cable ties or lock wire
That is a nice looking bike.
Bendy toy
Registered user
A woven stainless wire mesh grille (1mm wire 5mm pitch) will hardly affect airflow and protect the radiator. But ideally needs to stand off the radiator tubes in case a big angry stone comes say hello.
Not sure I understand the difference? Both scenarios were the same ie tickover and air being forced over radiator.
If the cover restricted airflow and therefore cooling, then the temp would have gone up....or am I missing something?
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