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Old 12-26-2003, 10:53 PM   #1
santofontana
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Default Heat from aftermarket header & oil filter

Will one of these things draw heat from the much hotter header into the filter or will it work as intended next to such a hot heat source?
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File Type: jpg oil cool collar.jpg (17.2 KB, 141 views)
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Old 12-27-2003, 12:41 AM   #2
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It's basically a heat sink. I would think it would draw heat from the header, it was most likely meant for cars with oil filters in the middle of nowhere like earlier hondas. Since it's hose strapped to the filter it would pretty much transfer that heat to the filter. If there was an insulator between that and the oil filter I guess it could act as a heat shield, but I don't see it being effective at all for Subarus.
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Old 12-27-2003, 10:41 AM   #3
rbehny
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These are very popular on air cooled VW's and Porsche's. There is a thermal wrap you can put around the filter to insulate it then put that on.

Also our filters are in a pretty good spot to get air flow from under the car. I doubt you'd get more than a 10* change in oil temp. Most air cooled cars especially older 911's only showed 15-20 degree differences. Since our cars aren't air cooled i'd expect to see alot less of a gain.

ps.. Yes i know 911's oil filters were not exposed to direct air but still the difference between older air cooled and newer coolant cooled cars is big.

Robert
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Old 12-27-2003, 12:10 PM   #4
fatray
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Thumbs down Will it work here

I wonder if it would do good for my setup?


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Old 12-27-2003, 01:05 PM   #5
rbehny
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Well it looks like you have a oil cooler above it already. I would suggest wrapping your header with some exhaust wrap if you really want to drop the temp. That or you could just use some more of the exhaust heat shield material

robert
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Old 12-27-2003, 01:31 PM   #6
santofontana
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The idea was to keep the heat from the header away from the oil filter, but I agree w/ tdxflex, it would work unless there was some sort of insulation between the collar and the filter.

Im surprised those things can show a 10 degree change even in air cooled apps, I thought it was kindof a gimmick, but I guess not. It just doesnt seem like it will work in this application.

Anybody got a pic of their solution to this prob?
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Old 12-27-2003, 04:46 PM   #7
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I'm not sure about 10 degrees cooler, but the basic idea makes sense. It's adding more surface area to the oil filter for better heat transfer. When I had my oil temp gauge installed, my highest temps were in the 96C range which is really nothing to worry about, the stock heat exchanger works well on the street. If you really need more cooling, you should get an external cooler with a tstat if you get cold weather. But if you want to try the insulating thing it would be better to insulate the exhaust manifold rather than the filter because it would also keep the heat close to the exhaust piping - good for turbo spool-up.
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Old 12-27-2003, 07:26 PM   #8
santofontana
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Quote:
Originally posted by tdxflex
But if you want to try the insulating thing it would be better to insulate the exhaust manifold rather than the filter because it would also keep the heat close to the exhaust piping - good for turbo spool-up.
Right, I am going to wrap my header (waiting for the wrap to come in the mail). I just wanted to do something extra, but the heat sink collar doesnt seem like the right 'extra' thing to do.

I agree that the wrx runs pretty cool, sometimes I think too cool considering the amount of fuel in most wrxs oil analyses.
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Old 12-27-2003, 08:12 PM   #9
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I think the reason for a lot of that fuel in the oil is because of the pig rich nature of the stock tune, and that becoming blow-by.

My 2˘
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Old 12-27-2003, 08:17 PM   #10
santofontana
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Quote:
Originally posted by Uncle Scotty
I think the reason for a lot of that fuel in the oil is because of the pig rich nature of the stock tune, and that becoming blow-by.

My 2˘
I agree that thats how the gas gets there, but if it ran a little hotter, would more of the gas burn off? Thats all I was saying and I realize that the engine probably runs at the temp it does for some very good reasons. The gas doesnt seem to harm anything anyway as long as you change the oil every once in a while.
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Old 12-27-2003, 08:21 PM   #11
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Default Re: Heat from aftermarket header & oil filter

Quote:
Originally posted by santofontana
Will one of these things draw heat from the much hotter header into the filter or will it work as intended next to such a hot heat source?
That functions based on differentials - if the air around it is cooler than the filter it will work as intended drawing heat from the oil to the air, albiet not very much. However if the air around it is heated by an uncoated or unwrapped set of primary pipes and collector - it will increase the heat of the oil as it just so happens immediately after the oil has left the oil cooler.
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Old 12-27-2003, 08:39 PM   #12
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here's where i got some of my info from for the temperature difference.

http://www.pelicanparts.com/techarti...ool_collar.htm

I was off by a bit but it's still a large gain for such a simple device.
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