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Old 02-23-2010, 03:52 PM   #1
williaty
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Default Is there an aluminum radiator available for the GD 2.5RS?

Does anyone know of an aluminum radiator that will fit a 2005 2.5RS? Koyo doesn't have one. Mishimoto doesn't have one. eBay does, but **** that noise.
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Old 02-23-2010, 04:21 PM   #2
XanRules
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I imagine Griffin makes one.
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Old 02-23-2010, 04:35 PM   #3
Mishimoto
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Maybe we can get you set up with a universal radiator? You would only need posts welded onto it to fit into the radiator support.

Send me a PM if you have any questions.
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Old 02-23-2010, 04:42 PM   #4
funky monk
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I'm surprised Koyo doesn't, I thought they did.

Last edited by funky monk; 02-23-2010 at 04:48 PM.
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Old 02-23-2010, 05:25 PM   #5
BAN SUVS
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Use a WRX/STi one and put a cap in your upper radiator hose. Summit has the adapter for ~$30.
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Old 02-23-2010, 07:04 PM   #6
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If my Legacy can use a wrx/sti radiator, I'm willing to bet that you can too.
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Old 02-23-2010, 10:52 PM   #7
RaceFaceXC
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what is the factory crap made of if it's not aluminum? Or aluminium if you're a limey.
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Old 02-23-2010, 11:02 PM   #8
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Bronze and something or the other. I'm not really sure that aluminum racing radiators are better at cooling because they're aluminum or because of some other design change that just happens to be sold along with the aluminum.
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Old 02-23-2010, 11:09 PM   #9
BAN SUVS
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Usually they're better because of the greater capacity, not so much better conductance. They do have more transfer area too typically, so I suppose mostly they do have a greater capacity for heat transfer.
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Old 02-24-2010, 09:53 AM   #10
Patrick Olsen
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Quote:
Originally Posted by williaty View Post
Bronze and something or the other.
Really? I haven't seen a non-aluminum OEM radiator in any car in years. All the Subaru radiators I've ever seen are aluminum with plastic end tanks. Strange that Subaru would have "regressed" to the cheaper style in later years.

Quote:
Originally Posted by willliaty
I'm not really sure that aluminum racing radiators are better at cooling because they're aluminum or because of some other design change that just happens to be sold along with the aluminum.
Actually, aluminum is not as good at transferring heat as copper/brass. But aluminum is lighter and stronger, so the entire (empty) radiator should weight noticeably less and use larger tubes, which allow for more contact between the fins and the tubes. I'm honestly not sure how that ends up balancing out - copper/brass' better heat conductivity vs. aluminum's better efficiency in construction. As BAN SUVS said, aluminum aftermarket radiators are often better because they have a thicker core, so it's not a particularly even comparison. (That greater capacity also tends to wipe out the weight savings, since your radiator is now carrying that much more fluid.)

Pat Olsen

Last edited by Patrick Olsen; 02-24-2010 at 10:01 AM.
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Old 02-25-2010, 01:34 AM   #11
rougeben83
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The other thing that people switch to aluminum radiators is that they don't have to deal with plastic endtanks anymore. That's usually where the stock rads crack/leak at.
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