radiators, radiator, radiators
 

as requested Here is a start for the Radiators thread. I will clean it up, perdy it up, and add more info soon.
please feel free to add info, or pictures if you have it. :)


Mazda OEM $379
http://www.trademotion.com/partlocat...04&catalogid=1

BHR - $$550/MT and $650/AT (RX8Club.com Forum Vendor! and the only place that makes a Rad for the Auto!) (Charles R. Hill)
https://www.rx8club.com/series-i-major-horsepower-upgrades-93/black-halo-racings-product-line-146611/

RE-medy - $525 (RX8Club.com Forum Vendor!) (MazMart)
http://www.mazmart.com/ or see Post 75 of this thread ( https://www.rx8club.com/showpost.php...6&postcount=75 ) for more details

Koyo: $330
http://www.rx7store.net/product_p/koyorx8.htm

PWR: $479
http://www.vividracing.com/catalog/p...031ecbb6df0a3e

Silla: $207 (this seems like just a 'premium' stock replacement)
http://www.car-stuff.com/mmparts/maz.../radiator.html

ARW $559
http://www.awrracing.com/store/produ...products_id=68

Knight Sport $???
http://japanparts.com/db/partslist.p...maker=&volkey=

Greddy $893
http://www.advancespeedshop.com/gred...03-p-3844.html

Mishimoto $320
http://www.mishimoto.com/mishimoto-u...-radiator.html












Cooling Fans:
http://www.mishimoto.com/cooling-accessories.html

AWR: $558.95
http://www.awrracing.com/store/produ...products_id=68

this is the same radiator mazda motorsports sells to racers, but AWR's price is better.

Mazda OEM, $379.80 for MT, $415.90 for AT:

http://www.trademotion.com/partlocat...04&catalogid=1

ok, Good idea!
Question, what would be the benifits Of swapping out rads?

If you are autocrossing, racing/etc. it will keep your water temperatures down, longer. Also, these days if you are driving in extreme temperatures, for long periods of time, hard then it will keep your temps down.

How about us daily drivers? I figured it would be good for me here in Georgia with 90+ degree weather for weeks now.

I got the koyo radiator and it just fit with like 2mm of clearance. It is awesome for the price.

theres a mazdaspeed radiator and r magic radiators, not sure if it's worth looking into especially for double the price...

link
http://japanparts.com/db/partslist.p...maker=&volkey=

Are the stock radiators brass or aluminum?

How many degrees can an aftermarket radiator lower the water temperature? 5°C? more? less? I have a keen interest, but I don't know the real gain in temperature.

bye

wouldnt getting a Cooler Thermostat do the same thing?kick the fans on at an earlier time be just as benificial?

It will not lower the temp much. Its just going hold your Coolant temp. at a stable level Longer than stock Radiators.

a Must for people who "SC/Turbo/autoX/Race/drive HARD on streets with hot temp"

:SHOCKED:

I have fitted a PWR radiator to ny RX-8. Nice quality but the mechanic said he had major problems with the mounting brackets. It appears that they do not match the stock radiators brackets. The mechanic had to make extra bracketing to fit the PWR radiator. I dont know if this is because euro zone cars differ to those in USA?

And how to get extra cooling for the oil
 

Dear sirs,

We easily find aftermarket radiators to cool the engine coolant (water+glycol or any other antifreezer. Let´s call that just water). Some examples are shown within this thread.

Now, if you get more engine power you need extra water heat rejection (i.e bigger water radiator) AND also extra oil heat rejection. Probably in the same proportion if not more.

Therefore this thread would be comprehensive if aftermarket oil heat radiators are added to upgrade the stock ones (some models are equipped with one whereas some others with two BTW).

Anyone knows of any oil rad?

Cheers

jird20

Note: It is sad to realise the complete lack of thermal data on aftermarket radiators, such us heat rejection, max air temp, water outlet temp, etc. It is pure marketing to quote a radiator as "racing radiator" because how better is that? :nono:

Pretty sure this is the same stateside also. The top brackets don't line-up, as I recall.

Thats why people like Koyo better.

Now you tell me :) , hope somebody from PWR reads this. Don't know why they can't get the mounting brackets right. The PWR is a lot more expensive than the Koyo, so no excuses

You might want to look here (http://www.fluidyne.com/) for potential oil coolers.

Also go with underdrive pulleys. Above 7,000 rpm, the water pump starts cavitating and doesn't push as much coolant through the system. The underdrive pulleys correct that.

^really i haven't heard of that..but i haven't really been checkign out the forum as of late...guess i have a lot of reading to do :(

How much in terms of size/ rows is koyo over stock? more surface area?

Yup... from the Mazda Motorsports site:

http://www.mazdamotorsports.com/webapp/wcs/stores/servlet/Tech?storeId=10001&subject=cooling

holy crap! Wow I thought getting the underdrive pulley was just to look for some small gains... You guys are saying that it allows the water pump to run better at higher rpms?

Why didn't Mazda do this from the start?

Probably because of all the A/C complaints.

It is pretty warm while at idle w/ the pulley, while moving its frosty and delicious.

Thats because most owners will spend most of their car's life under 7000 rpm.