Radiator suggestions?
12-03-13, 05:05 PM
#26
brass costs about 3 times as much as aluminum. copper is roughly 4-5 times as much as aluminum.
the thermal conductivity is better but the prices will reflect the difference, in most cases aluminum is sufficient as you can make a radiator 25% deeper, as efficient and for half the price.
Last edited by RotaryEvolution; 12-03-13 at 05:07 PM.
12-03-13, 05:14 PM
#27
MECP Certified Installer
brass costs about 3 times as much as aluminum. copper is roughly 4-5 times as much as aluminum.
the thermal conductivity is better but the prices will reflect the difference, in most cases aluminum is sufficient as you can make a radiator 25% deeper, as efficient and for half the price.
the thermal conductivity is better but the prices will reflect the difference, in most cases aluminum is sufficient as you can make a radiator 25% deeper, as efficient and for half the price.
My copper rad cools like a beast.
12-03-13, 06:44 PM
#28
you can buy even namebrand cores for about $75, so they're charging $225-$325 to weld up some $10 sheet metal together. you could pay to have a full radiator way beefier fabricated for less than a koyo costs, but the problem is dimensions and whether it will fit right or not.
when i had domestic muscle cars you could get a radiator twice as big as these for about a buck fifty and they were made in the USA.. i know shipping hurts but not that much.
Last edited by RotaryEvolution; 12-03-13 at 06:48 PM.
12-03-13, 07:33 PM
#29
Information Regurgitator
nope, it just goes to show how much you pay for a name is all.
you can buy even namebrand cores for about $75, so they're charging $225-$325 to weld up some $10 sheet metal together. you could pay to have a full radiator way beefier fabricated for less than a koyo costs, but the problem is dimensions and whether it will fit right or not.
when i had domestic muscle cars you could get a radiator twice as big as these for about a buck fifty and they were made in the USA.. i know shipping hurts but not that much.
you can buy even namebrand cores for about $75, so they're charging $225-$325 to weld up some $10 sheet metal together. you could pay to have a full radiator way beefier fabricated for less than a koyo costs, but the problem is dimensions and whether it will fit right or not.
when i had domestic muscle cars you could get a radiator twice as big as these for about a buck fifty and they were made in the USA.. i know shipping hurts but not that much.
12-03-13, 07:39 PM
#30
Looking on rockauto.com a brass/copper radiator for a 88 Rx7 is $87.00 more than one for my wifes Mazda Tribute( rebadged Ford escape) from the same manufacturer. It is bigger than the Rx7 one but has an aluminum core and plastic tanks. It is $96.79. If they made these aluminum cored ones for the Rx7 I wonder if they would be less than $100.00 too?
12-03-13, 07:39 PM
#31
Information Regurgitator
brass costs about 3 times as much as aluminum. copper is roughly 4-5 times as much as aluminum.
the thermal conductivity is better but the prices will reflect the difference, in most cases aluminum is sufficient as you can make a radiator 25% deeper, as efficient and for half the price.
the thermal conductivity is better but the prices will reflect the difference, in most cases aluminum is sufficient as you can make a radiator 25% deeper, as efficient and for half the price.
12-03-13, 07:41 PM
#32
in my experience the copper/brass radiators work as well if not better than aluminum parts and they fail less often. the only real problem is no one makes them in performance upgrade sizes, so they're designed to simply meet OE specifications. so if your car doesn't need more cooling, it's fine.
12-03-13, 07:57 PM
#33
Information Regurgitator
Yeah, I figure there were way more Escape/Tributes sold than 2nd gen Rx7's.
12-03-13, 08:11 PM
#34
Information Regurgitator
yes.
in my experience the copper/brass radiators work as well if not better than aluminum parts and they fail less often. the only real problem is no one makes them in performance upgrade sizes, so they're designed to simply meet OE specifications. so if your car doesn't need more cooling, it's fine.
in my experience the copper/brass radiators work as well if not better than aluminum parts and they fail less often. the only real problem is no one makes them in performance upgrade sizes, so they're designed to simply meet OE specifications. so if your car doesn't need more cooling, it's fine.
Sounds like a brass/copper one may be a viable option for the original poster since he only wants an OE sized one. Mine is a CSF and the fan shroud fit fine before I went to the E-fan. Don't know how the ones on rock auto for the rx7 fit but the ones I've bought off there for 3 other cars fit fine.
12-03-13, 09:01 PM
#35
a 2 row aluminum might be the same size as a 4 row copper...
12-03-13, 11:17 PM
#38
Information Regurgitator
https://www.rx7club.com/2nd-generati...umbers-615331/
was between 155,380 and 161,386 from1986 to 1992. I'd agree though there probably is 100 of them on the road for every one FC moving under it's own power.
12-04-13, 12:45 AM
#39
yes.
in my experience the copper/brass radiators work as well if not better than aluminum parts and they fail less often. the only real problem is no one makes them in performance upgrade sizes, so they're designed to simply meet OE specifications. so if your car doesn't need more cooling, it's fine.
in my experience the copper/brass radiators work as well if not better than aluminum parts and they fail less often. the only real problem is no one makes them in performance upgrade sizes, so they're designed to simply meet OE specifications. so if your car doesn't need more cooling, it's fine.
12-04-13, 09:27 AM
#40
Information Regurgitator
Now this sounds like a winner that would meets my requirements. What brands are made out of copper/brass materials? I know koyo is out of the question. I am thinking godspeed or mazdaspeed? At this point I am simply looking to get the radiator with little to no modification, meaning all the mounting points line up to the oem specifications. It is tough to gauge which options to go with seeing the amount of mixed reviews I am getting here. I suppose I would just have to see the results myself.
08-05-14, 11:45 PM
#41
Information Regurgitator
Was browsing through threads I had posted in and decided to ressurect this one. Since I posted in this thread I have gotten a Godspeed radiator. My brass/copper one leaked when I got my car back together. Core must've got hit at some point while it was out. It cools much better than my old one or the stock one ever did. The temps stay more stable and haven't gotten as high this summer. This is measured with an autometer gauge. This may not be an apples to apples comparison though since the Godspeed is a dual pass like the Koyo N-flow with an almost twice as thick core as the stock one.
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