~$100, 38mm Aluminum NA Radiator - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 06-15-2014, 08:22 PM   #1
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default ~$100, 38mm Aluminum NA Radiator

Does this exist anymore? Are all the Chinese rads 55mm? 55mm is not desired in this application due to weight.
Ben is offline   Reply With Quote
Old 06-15-2014, 08:26 PM   #2
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,357
Total Cats: 1,322
Default

What's the application?
Savington is offline   Reply With Quote
Old 06-15-2014, 08:27 PM   #3
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Exocet
Shooting for 1400lbs
Ben is offline   Reply With Quote
Old 06-15-2014, 08:52 PM   #4
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,357
Total Cats: 1,322
Default

The chinese 55mm stuff doesn't cool much better than a 37mm Koyo. I doubt a 38mm Chinabay core would do much more than stock. Probably why you don't see it. I assume it's naturally aspirated?
Savington is offline   Reply With Quote
Old 06-15-2014, 09:09 PM   #5
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Yes, N/A, probably 125-130 whp on pump gas, a little more on E85. I would rather wait on Emilio's super secret squirrel crossflow than put the same money in a Koyo.
Ben is offline   Reply With Quote
Old 06-16-2014, 10:07 AM   #6
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,091
Total Cats: 90
Default

Put in an OEM one. It should cool that more than well enough, if you have decent air control (ducting and venting and such) and its the lightest option.
Leafy is offline   Reply With Quote
Old 06-16-2014, 10:12 AM   #7
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,460
Total Cats: 782
Default

My old Chinabay 55mm didn't weigh more than 1lb more than the 37mm Koyo. Just as a data point.
concealer404 is offline   Reply With Quote
Old 06-16-2014, 10:56 AM   #8
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,833
Total Cats: 1,786
Default

what about just this?

cxracing.com: Aluminum Radiator For 90-97 Mazda Miata Manual;Core Size: 25"x13"x2",1.25" Inlet & Outlet

50mm for $150.


or get Lars to pull the rad out of my car and swap him a stocker plus a few $$. Mine was an old 50mm CSP rad.
Braineack is offline   Reply With Quote
Old 06-16-2014, 11:22 AM   #9
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Quote:
Originally Posted by concealer404 View Post
My old Chinabay 55mm didn't weigh more than 1lb more than the 37mm Koyo. Just as a data point.
55mm core size should also add 5 lbs of mass in water.
Ben is offline   Reply With Quote
Old 06-16-2014, 11:26 AM   #10
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Quote:
Originally Posted by Leafy View Post
Put in an OEM one. It should cool that more than well enough, if you have decent air control (ducting and venting and such) and its the lightest option.
I'm buying a new rad one way or the other, was just hoping to get one with aluminum tanks. However that may be my best option if an inexpensive, OE-sized aluminum unit does not exist.

Last edited by Ben; 06-16-2014 at 11:40 AM. Reason: spelling
Ben is offline   Reply With Quote
Old 06-16-2014, 11:28 AM   #11
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,460
Total Cats: 782
Default

Quote:
Originally Posted by Ben View Post
55mm core size should also add 5 lbs of mass in water.

Meh. Details.
concealer404 is offline   Reply With Quote
Old 06-16-2014, 11:29 AM   #12
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,091
Total Cats: 90
Default

Quote:
Originally Posted by Ben View Post
I'm buying a new rad one way or the other, was just hoping to get one with aluminum tanks. However that may be my best option of an inexpensive, OE-sized aluminum unit does not exist.
Honestly, the OEM plastic tank will last another 20 years. I'm seeing the average life of china rads (on forums) before they pop a pinhole to be like 3-5.
Leafy is offline   Reply With Quote
Old 06-16-2014, 12:07 PM   #13
Senior Member
 
Join Date: May 2011
Location: Pennsylvania
Posts: 1,119
Total Cats: 33
Default

Quote:
Originally Posted by Leafy View Post
Honestly, the OEM plastic tank will last another 20 years. I'm seeing the average life of china rads (on forums) before they pop a pinhole to be like 3-5.
This is very true.... Already replaced 2 Godspeed Rads over the 6 years that ive owned my car. (only because it had one on it to begin with, dont have a stock to slap on there)
supercooper is offline   Reply With Quote
Old 06-16-2014, 01:24 PM   #14
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,833
Total Cats: 1,786
Default

yeah not seeing any all-aluminum 1-row rads. There used to be one, I remember when i bought my 2" core there was the option to buy the single-row replacement one. But that was back in like 2003 and the company, coolradiators.com, no longer exists.

The price on the plastic/alumin 1-row is so good, might as well just get one, if what you want is the lightest/smallest one you can fit; plenty for under $100 shipped on ebay.
Braineack is offline   Reply With Quote
Old 06-16-2014, 03:38 PM   #15
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,357
Total Cats: 1,322
Default

Quote:
Originally Posted by Braineack View Post
yeah not seeing any all-aluminum 1-row rads. There used to be one, I remember when i bought my 2" core there was the option to buy the single-row replacement one. But that was back in like 2003 and the company, coolradiators.com, no longer exists.
CSF/coolradiators.com had the 1" on their site when I tried to buy one in ~2007, but they shipped me the 2" instead because the 1" was NLA.
Savington is offline   Reply With Quote
Old 06-16-2014, 09:34 PM   #16
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

So be it. Thanks all.
Ben is offline   Reply With Quote
Old 06-17-2014, 08:36 AM   #17
Junior Member
iTrader: (1)
 
Join Date: Aug 2008
Location: Austin, TX
Posts: 239
Total Cats: 4
Default

Quote:
Originally Posted by Savington View Post
The chinese 55mm stuff doesn't cool much better than a 37mm Koyo. I doubt a 38mm Chinabay core would do much more than stock.
Slight twist of the topic:
Any idea on why? Crappy fins. Worthless soft alloy. ???

I'm looking at replacing my 38(ish) PWR with half width EG Civic model. Gotta get rid of weight on the front of the XP car somehow. I currently have a cheap ebay one that I'll use for test fitment but I want to spring for something better.

I know the PWR fins are much more substantial, as in you can actually touch them without bending them. The fins on the cheap one bend if you look at them funny.
mcfandango is offline   Reply With Quote
Old 06-17-2014, 09:32 AM   #18
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,833
Total Cats: 1,786
Default

the density of the fins is just not there. they are cheaply made and not with efficiency in mind. where good manufacturers will design the fins

I think it was Corky Bell that said they had a customer car with an intercooler from ebay that had no fins at all, inside the core.

While I haven't personally dealt with cheap radiators, im sure the same holds true with them as it does with intercooler cores.

Consider this chinese core:



the fins are loosely folded/packed, and it appears there are holes drilled in them throughout.

compared to this core:



the fins are densely packed.

Good cores will have fins that have louvers cut in them that increase the cooling effectiveness:




here's a KOYO radiator core cut open, you can see the dense louvers:



This ebay rad doesn't appear to have that sort of goodness:




not to mention even how cheap and fragile the ebay cores are in comparison to a Percision or Bell core. Night and Day.
Attached Thumbnails
~0, 38mm Aluminum NA Radiator-xo2.jpg   ~0, 38mm Aluminum NA Radiator-iccore3.jpg   ~0, 38mm Aluminum NA Radiator-apr_fmic_core_shot1.png   ~0, 38mm Aluminum NA Radiator-impp_0908_08_z-radiator_analysis-koyo_r_series_radiator_view.jpg  
Braineack is offline   Reply With Quote
Old 06-17-2014, 09:37 AM   #19
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,833
Total Cats: 1,786
Default

Ben, why not a cheap COPPER radiator? I'm assuming copper is heavier, but by how much? it would be more effiective though, no?
Braineack is offline   Reply With Quote
Old 06-17-2014, 10:45 AM   #20
Senior Member
iTrader: (1)
 
Join Date: Jul 2012
Location: durham NC
Posts: 767
Total Cats: 115
Default

Edit: I have read this but never weighed it myself.

The manual transmission OEM radiator is lighter/lower coolant volume than the automatic version. All of the ~$100 OEM replacements you can find are of the automatic radiator so if you are really trying to lose weight get a manual transmission version from mazdaspeed.

I am also super curious to see the final weight of your naturally aspirated exocet. I did napkin math a while back and it seemed like you be able to get one just under 1400lb with some effort. (aluminum shocks, kirkey seats, 2lb battery...)
asmasm is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
ACT race clutch and AASCO 7lb. aluminum flywheel graexodus Miata parts for sale/trade 5 10-26-2015 02:48 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 04:20 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:53 AM.