So I'm curious at what temp do you think you should be at?

It your looking for the closest to stock fitment on a street car, might as well save $300 and buy the CSF on eBay...

I've heard bad things about those radiators though.

I do not know where you are getting your information from, but it is just incorrect.

We install the Koyo in nearly every car that comes through our shop.

Here is one that we just recently finished, Koyo N-flo with Pettit SMIC. Not a single fitment issue. http://www.banzai-racing.com/2010_cu...stallation.htm

http://www.banzai-racing.com/2010_cu...y_08-10-10.jpg

buy a griffen they will put the upper or lower neck where ever you want it

Just go with the koyo. It's only $299 and will do a good job of cooling. The fluidyne also works but not worth the extra cash.

I got the CSF all-aluminum racing radiator from radiatorworld.com a few years ago, then let it sit in the garage for over a year before installing it. The first time I removed the drain plug it stripped out to the point it wouldn't go back in properly. The drain plug was very poor quality, it appeared to be made from soft aluminum just like the radiator. I found a large drill bit, tap & bolt to essentially make a new drain plug... but this burned quite a few hours and some money too. As mentioned above, the mounting tabs weren't very good either, it's been a while but I think I trimmed them down to make the radiator fit.

Aside from that it seems to work OK, the stock fans fit, I haven't noticed any problems with the OEM airbox fitment (as mentioned above with the Fluidyne) and no leaks and the temps look OK so far.

I've seen a few cars (not RX-7's) with Mishimoto radiators, but didn't get a chance to ask the owners about them. Has anyone got experience using that brand?

I use a Fluidyne on my car. I was also considering the Koyo, but I found a closeout type deal on my Fluidyne so I got it much cheaper than normal :)

No complaints. It gets well over 90+ F here every day in the summer and it still keeps my car cool (around 85 C) on the street and keeps things reasonable on the track (around 100-105 C).

Whatever you buy - it may require some minor customization to get the ducting working 100% - that is a KEY thing many folks overlook. Doesn't matter what radiator you have if the air is going AROUND IT rather than THROUGH IT.

To me, it sounds like the Koyo is a good deal, but I am satisfied with my Fluidyne too :)

Mishimoto is ok but it doesnt come with the upper mounts or ast nipple

The koyo and fluidyne do they take the stock fans?

Yes.

modified koyo and v mount thats what i run and it never gets over 85C and intake temps never pass 25C-30C and i am running a 62-1 turbonetics

are you guys running vented hoods or not?

I find it interesting (funny) that no one has asked what type of use this car gets. Maybe I just missed it? If you are road racing, you will need a bigger radiator. If not, fitment should be the most important issue.

I bought a fluidyne because they had the best reputation for quality, and the installation (fitment) required less modifications than the Koyo. If I were road racing, I probably would have purchased the Koyo. I do some autocrossing, and the Fluidyne works fine.

^Exactly.
And FWIW, I have seen some welds on a KOYO that looked like something I'd have could have done. And I'm certainly not a professsional welder. Mind you it was older and apparently holding up OK, but it was in contrast with welds on my Fluidyne. And I've used the petcock a dozen times or so over the years. No issues so far.

here on the forum and people I know.

Let me make sure I understand correctly. So are you saying that the koyo is a DIRECT drop in replacement with no modidifications, massaging, nor anything esle done other than dropping it in. And it will fit with no issues in conjuction with a pettit large smic?

hi, what you think about this radiator.
I asked the seller for a few details about. so it does AST nipple and fit to stock position. its 3rows so i think its good deal.. or not?
http://cgi.ebay.co.uk/ws/eBayISAPI.d...:X:RTQ:GB:1123
Currently I have the original seventeen years old radiator... :(

IMHO you would do better to go with something a little better known. PWR, Fluidyne are 50% larger than stock, Koyo 100% larger than stock. Generally speaking, the larger you go the more fitment issues.
Doesn't sound like there's much "track record" or expericence with that radiator, so your unsure how it will fit...will the fan assembly bolt on to it? Will the bottom tank mounts line up etc? Good welds? Material quality? I undertand the seller claims it will, but it says "all sales final" and even if they do take it back, you'll pay the shipping and they'll charge you 20%.
Unless you can check with some other owners who have bought one, I'd spend the difference and go with something proven if available in Europe. If not, I'd go with another stock radiator.
Hodne stesti ?

Am I the only one that has never had a problem with the stock rad?

I don't track the car, but I do compete in road rally's that last for 3+ hours at a time in hot weather. I drive the car pretty aggressively during the rally's and in day-to-day to driving. My temps usually sit around 82 and never get higher then 87.

I think upgrading your rad or installing a vented hood should be the least of your worries right now. You need to upgrade that intercooler NOW!

friend tested a similar no-name radiator from ebay for about 250$ and it works very well. Here is the result.
http://sphotos.ak.fbcdn.net/hphotos-..._3952117_n.jpg
Dimensional is much bigger so the cooling effect is a lot better, the main reason why I want him. koyorad or similar brands has "better quality" at first sight, but I do not think it worked much better than these kinds.
For us in Europe is a problem with imports. radiator costs 300$ but I will get another 200$ or more for postage and duty. is more convenient to buy from the UK. So if anyone has any tips I'll be happy. :)

great deal on PWR's radiator on ebay in case anyone's interested. ($260 SHIPPED, these are normally $400+shipping)
http://cgi.ebay.com/ebaymotors/MAZDA...Q5fAccessories

where you have the temp sensor? I assume you have additional gauge.
82°C in summer with spirited drive and stock radiator. youre lucky guy :)

thats what iam talking about.. price is fine but postage

Shipping and handling To Czech Republic $1,584.66 UPS Worldwide SaverSM
so :(
but PWR looks good.

^ ditto nothing else is need perfect fitment and cooling (FLUIDYNE) don't forget r1 or better oil coolers help big time