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ThermalHunter
Joined: 13 Dec 2012
Posts: 9
Location: Cleveland, TN
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 Posted: Mon Feb 15, 2016 3:37 pm Post subject: 582 Radiator Advice |
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I just replace my Rotax 503 with a 582 on my Firestar II. I am looking for advice on what radiator to use. Thanks
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Richard Pike
Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee
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| Posted: Mon Feb 15, 2016 6:06 pm Post subject: Re: 582 Radiator Advice |
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Here is what Rotax recommends according to CPS: https://www.cps-parts.com/catalog/rtxpages/cps15-04302.php?clickkey=1517555
Note the dimensions: 11" X 11" x 1.25". That is the one thing you need to know, other than that CPS gets $425 for it and the plumbing fittings come out at inconvenient places; the top one points down and the bottom one is on the wrong side. If you mount it on the back of your cage, it is helpful if both plumbing fittings come out facing aft, (and up, or at least not down) with the one by the right wing at the top of the radiator, and the one by the left wing at the bottom of the radiator. That makes plumbing it up so much easier.
Now you can go to your friendly local motorcycle salvage yard and see if they have a good clean radiator that is at least 11" x 11" x 1.5" that has the plumbing coming out at convenient places and they want a fair price for it.
Or you can go to ebay and get something like this:
http://www.ebay.com/itm/Motorcycle-Replacement-Aluminum-Radiator-Cooler-Cooling-For-BENELLI-TREK-899-New-/141419647261?hash=item20ed44911d:g:X-gAAOSwRLZUErZ0&vxp=mtr
It looks like it might fit, the plumbing is in the right place, and it looks big enough. Your call. But this is the general idea.
PS: You do know that Kolb recommends beefing up the FS II cage when adding a 582, don't you? Maybe something like this? http://oh2fly.net/oldpoops/kolb.html
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Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing. |
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tomb2b
Joined: 24 Jan 2014
Posts: 3
Location: WAMPUM PA
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| Posted: Fri Feb 26, 2016 5:43 pm Post subject: Re: 582 Radiator Advice |
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I would go with the twin rotax rads less wait they cool it the right way...
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tomb2b
Joined: 24 Jan 2014
Posts: 3
Location: WAMPUM PA
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| Posted: Fri Feb 26, 2016 5:45 pm Post subject: Re: 582 Radiator Advice |
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I would go with the twin rotax rads less weight they cool it the right way...
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Mon Feb 29, 2016 8:56 am Post subject: 582 Radiator Advice |
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The twin radiator set up is designed for a tractor installation. They don't work worth a damn on a pusher like the Kolb. On top of that they're meant for a "C" gearbox mount AND Rotax wants over $800 for the complete kit. There's a better way.Somewhere in the archives is my report on a radiator that does work. It's off a Honda Magna motorcycle, has the fittings in the right location and can be had for anywhere from $25 to $200 so do your shopping on eBay.
How well does it work? I took off on a July afternoon when the thermometer read 117 and climbed direct to 6,000 ft. Needle on the coolant temp meter never came out of the green on a three and a half hour flight. I almost boiled over but the engine never came close.
Rick Girard
PS You'll notice that there's two different systems pictured. Worked perfectly both times.
On Fri, Feb 26, 2016 at 7:43 PM, tomb2b <ferreeb2b(at)gmail.com (ferreeb2b(at)gmail.com)> wrote:
| Quote: | --> Kolb-List message posted by: "tomb2b" <ferreeb2b(at)gmail.com (ferreeb2b(at)gmail.com)>
I would go with the twin rotax rads less wait they cool it the right way...
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453245#453245
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Mon Feb 29, 2016 9:25 am Post subject: 582 Radiator Advice |
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Rick G/Kolbers:
Only problem I had with my twin radiator set up on my 582 powered MKIII was the price. Worked fine for me the short 224 hours I flew that engine.
john h
mkIII
Titus, Alabama
From: owner-kolb-list-server(at)matronics.com [mailto:owner-kolb-list-server(at)matronics.com] On Behalf Of Richard Girard
Sent: Monday, February 29, 2016 10:56 AM
To: kolb-list(at)matronics.com
Subject: Re: Re: 582 Radiator Advice
The twin radiator set up is designed for a tractor installation. They don't work worth a damn on a pusher like the Kolb. On top of that they're meant for a "C" gearbox mount AND Rotax wants over $800 for the complete kit. There's a better way.
Somewhere in the archives is my report on a radiator that does work. It's off a Honda Magna motorcycle, has the fittings in the right location and can be had for anywhere from $25 to $200 so do your shopping on eBay.
How well does it work? I took off on a July afternoon when the thermometer read 117 and climbed direct to 6,000 ft. Needle on the coolant temp meter never came out of the green on a three and a half hour flight. I almost boiled over but the engine never came close.
Rick Girard
PS You'll notice that there's two different systems pictured. Worked perfectly both times.
On Fri, Feb 26, 2016 at 7:43 PM, tomb2b <ferreeb2b(at)gmail.com (ferreeb2b(at)gmail.com)> wrote:
--> Kolb-List message posted by: "tomb2b" <ferreeb2b(at)gmail.com (ferreeb2b(at)gmail.com)>
I would go with the twin rotax rads less wait they cool it the right way...
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453245#453245
===========
br> fts!)
r> > w.buildersbooks.com" rel="noreferrer" target="_blank">www.buildersbooks.com
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
-Matt Dralle, List Admin.
===========
-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
===========
b Site -
-Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
===========
<![if !supportLineBreakNewLine]><![endif]>
-- “Blessed are the cracked, for they shall let in the light.” Groucho Marx
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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tomb2b
Joined: 24 Jan 2014
Posts: 3
Location: WAMPUM PA
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| Posted: Wed Mar 02, 2016 2:06 pm Post subject: Re: 582 Radiator Advice |
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I have ran the twin for 20 years that system is designed for the water cooled engines some after market designed you can get a shock cool down you do not get the hours out of it I just bought a good used complete set on barnstormers 400 bucks for my kolb m3 fixer upper it had that big heavy rad mounted on it first thing I removed... just advice
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Wed Mar 02, 2016 4:02 pm Post subject: 582 Radiator Advice |
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I believe cold seizures are the result of improper thermostat set up, not
radiators. The thermostat must have a bleed hole of a specific diameter
that I cannot remember at this time. Smaller or no bleed hole at all with
cause cold seizures when the thermostat opens and dumps cold water from the
radiator into the cylinder and head. I learned this the hard way in 1993,
on my first MKIII engine, a 582 with 224.0 hours on it. My engine came
without a thermostat and I thought it would operate better with one. Bought
the thermostat from Rotax, but it did not have a bleed hole, or it had a
very tiny one. Been too long ago. Cannot remember.
john h
mkIII
912ULS with not thermostat
Titus, Alabama
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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