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Hi everyone,
As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.
When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.
Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.
Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.
Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.
Thanks for your patience and support!
TXC449 Oil cooler?
- Thread starter fire1998
- Start date
Tinken
Husqvarna
Pro Class
If you are unsuccessful in finding the necessary hardware to install an oil cooler, the adapter doesn't look too difficult to have made by a machinist. This nearly doubles the oil capacity of the engine as well.
This oil cooler is tiny, 4.5", and can easily be mounted on the side of the cylinder where the new fuel canisters are located:
http://www.hrpworld.com/index.cfm?form_prod_id=781,776,587_6038&action=product
This oil cooler is tiny, 4.5", and can easily be mounted on the side of the cylinder where the new fuel canisters are located:
http://www.hrpworld.com/index.cfm?form_prod_id=781,776,587_6038&action=product
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Ive been pondering this myself. And actually I would aim for something as large as can be mounted so it would act as additional oil capacity.
I think the Speedbrain Dakar bike had extra oil tanks built into the skid plate. Maybe you can find a pic of how they plumbed it.
I think the Speedbrain Dakar bike had extra oil tanks built into the skid plate. Maybe you can find a pic of how they plumbed it.
Gazing down there at the site sponsor list.... I see some candidates to build/sell these 
Imagine an nice anodized oil filter cap with the fittings to match my 7602 drain/screen plugs that I got at last years Fall Gathering...Add some hose, mounts and the cooler/canister....voila.
Imagine an nice anodized oil filter cap with the fittings to match my 7602 drain/screen plugs that I got at last years Fall Gathering...Add some hose, mounts and the cooler/canister....voila.
Do they need it? Mine seems to run quite cool but then i ride tighter stuff at slower speeds and in the NW which is cooler for the most part than many places. I have not seen posts of overheating issues with this motor / bike. Also from a manufacturer perspective it would end up a high cost part and sell very few along with being a major liability issue as you are messing with the engine oil system. One fitting comes loose or something happens and you ahve customers points at you for destroying engines. I don't see anyone tackling this. IMHO if you feel you need one the info is here to build it.
parts:
http://www.xrp.com/
http://www.xrp.com/catalog.html
parts:
http://www.xrp.com/
http://www.xrp.com/catalog.html
Tinken
Husqvarna
Pro Class
The average everyday rider does not need an oil cooler. You might not even need one for racing, but for long distance desert races such as those in Nevada, Southern Cali and Mexico, it's probably a good idea.
I myself do not race, but I have overheated my 511 to the point of blowing engineice out the overflow. Granted I was in Johnson Valley in +106° weather and probably shouldn't of been there in the first place. I love fun projects and will probably put together a oil cooler for my application.
I'm sure the folks over at Zip-ty racing could shed some light on oil coolers for Husky, they seem to know a lot about them. While you're there, check out Ty's new desert race tank for the 449/511, it holds about 3 gallons of fuel which would put your total near 5.5 gallons total.
I myself do not race, but I have overheated my 511 to the point of blowing engineice out the overflow. Granted I was in Johnson Valley in +106° weather and probably shouldn't of been there in the first place. I love fun projects and will probably put together a oil cooler for my application.
I'm sure the folks over at Zip-ty racing could shed some light on oil coolers for Husky, they seem to know a lot about them. While you're there, check out Ty's new desert race tank for the 449/511, it holds about 3 gallons of fuel which would put your total near 5.5 gallons total.
Tinken
Husqvarna
Pro Class
Spent the better part of today hanging out with Ty & Zip-ty racing while he set up my 511 for Shamrock's event this weekend. I was able to take a look at his oil cooler fitting he developed and it totally blows away the one I posted earlier. He was able to integrate a stainless steel oil filter onto the fitting and have two precision outlets for oil transfer. The water cooling system on the 449 platform works very well and runs very cool, but the oil temperatures are considerably above normal between 325 to 375°F. The alloy used to manufacture the cases of the 449/511 is different than Japanese alloys in that it holds heat in and does not dissipate it. Massive oil coolers are needed in order to cool the oil sufficiently, but space to locate these coolers are an obvious problem. Ty is developing a new system which will eliminate the need for a massive cooler, yet will still increase oil capacity and cool very efficiently with very little modification.
The other option to using an oil cooler is just to replace the torque limiter prior to each major race. Husqvarna does not sell the beveled pressure disks separately and requires you to purchase the entire limiter with gears for $229.
The other option to using an oil cooler is just to replace the torque limiter prior to each major race. Husqvarna does not sell the beveled pressure disks separately and requires you to purchase the entire limiter with gears for $229.
While I think there is merit to your idea and thoughts I also think it might be overkill for the majority of us. I have seen little to no issues posted regarding the torque limiter or any other parts. That said this could be why they need to run low oil levels as when it heats up it expands?
Tinken
Husqvarna
Pro Class
You're correct Kelly, as I stated in a previous post,the average everyday rider does not need an oil cooler. This is a race application. The low oil levels, as you know, are required to keep the oil from blowing out the breather. Speedbrain posted a recommendation to remove the crankcase ventilator from the air box and add a separate air filter to it when they designed the 480cc overbore.
When racing the 449 platform over long periods of time in elevated temperatures, the torque limiter may fail. Basically, BMW designed the 449 platform to have two wet clutches. Most manufactures design a cushioning dampener into their clutches in the form of rubber bushings. Early huskys had this dampening in the rear sprockets. This is needed when jumping and bringing the engine to a halt suddenly. Rather than damaging the engine, these cushions give a little. The cushioning effect on the 449 platform was engineered into a torque limiter which is on the right hand side of the crankshaft, in the inner case under the clutch. There are no springs in the torque limiter other than beveled disks. When heated excessively by extremely hot oil, these beveled washers loose their ability to provide constant pressure. Racers have reported that slipping has occurred during hard uphill climbs but that the torque limiters are re-engaged after cooling down. It is unclear what exactly happened to Malcolm's teams torque limiter when it flew apart, but that it did happen. Running thicker oil will not have an impact on this issue. It is this reason, above others that an oil cooler is recommended. Large reserves of cooled thinner oil will keep the engine performing while racing.
When racing the 449 platform over long periods of time in elevated temperatures, the torque limiter may fail. Basically, BMW designed the 449 platform to have two wet clutches. Most manufactures design a cushioning dampener into their clutches in the form of rubber bushings. Early huskys had this dampening in the rear sprockets. This is needed when jumping and bringing the engine to a halt suddenly. Rather than damaging the engine, these cushions give a little. The cushioning effect on the 449 platform was engineered into a torque limiter which is on the right hand side of the crankshaft, in the inner case under the clutch. There are no springs in the torque limiter other than beveled disks. When heated excessively by extremely hot oil, these beveled washers loose their ability to provide constant pressure. Racers have reported that slipping has occurred during hard uphill climbs but that the torque limiters are re-engaged after cooling down. It is unclear what exactly happened to Malcolm's teams torque limiter when it flew apart, but that it did happen. Running thicker oil will not have an impact on this issue. It is this reason, above others that an oil cooler is recommended. Large reserves of cooled thinner oil will keep the engine performing while racing.
Attachments
Tinken
Husqvarna
Pro Class
The oil cooler is easy, but making the actual adapter is very difficult. And after my exhaustive search across the internet, I didn't find anyone who was making the adapters.
So I pulled the trigger and had a couple of these made. I didn't like all the external parts of the adapter I posted above, so I had a custom conical stainless steel oil filter attached to the adapter that fits inside the oil filter housing and still allows oil to be ran to an external cooler.
Tinken
Husqvarna
Pro Class
Found a nice catalog here for oil lines, and heat coverings which I may put over my fuel lines like Speedbrain does.
http://www.scribd.com/doc/83284990
http://www.scribd.com/doc/83284990
Tinken
Husqvarna
Pro Class
These heat exchangers are extremely efficient and light weight, and have no coolant restriction. Perfect for this application.
http://www.racerpartswholesale.com/product/1562/Laminar_Flow_Oil_to_Water_Heat_Exchangers
http://www.racerpartswholesale.com/product/1562/Laminar_Flow_Oil_to_Water_Heat_Exchangers
Tinken
Husqvarna
Pro Class
They are the most efficient I have found so far. I would like to see if there are any others available?
Rearwheelin
Husqvarna
Pro Class
They don't give those things away, but I like the idea.
McKay
Husqvarna
AA Class
Why not a traditional cooler? These will take the oil heat and put it into the water system.
Your right, they are extremely efficient when the flows are set up right but they are really intended for another environment. Traditional use is for heating fuel in aircraft prior to burn, super cold fuel is warmed by engine oil.