radiator upgrade, what would you recommend?
 

I am running a T67 single turbo on a ported motor. I am producing allot of heat, normally around 85 so says my PFC. So i think its time i upgrade my coolant system from the stock one. I wanted to find out what most ppl with single turbos are running and what they would recommend I run.

Koyo.

What front bumper, hood and intercooler do you currently have?

-J

85C is not really hot at all... BUT, it is always a good idea to upgrade the stocker just due to the fact it has plastic endtanks.

+1 on the KOYO. That and fluidyne radiators are what most around here run.

Koyo N-flo, it does a fantastic job keeping my 20B cool

http://banzai-racing.com/store/93+_rx-7_radiator.html

Fluidyne is easy to install and works very well.

Gorilla RE, I have the stock bumper, intercooler, and hood. but I am looking at also upgrading my intercooler next

fluidyne is the best but also most expensive.
koyo n flow is the second best and second most expensive
standard koyo aluminum is the most common and cheapest yet decent aftermarket(yet still OEM manufacturer) radiator.

all 3 of these are direct bolt ons with minor modifications, there is others that will fit but custom brackets need to be made.

Supernaut< Fluidyne, never heard of it i will have to look into it.

Banzai-Racing< 20b, you are the man. I think thats every Rotor heads wet dream to own one

http://www.rx7store.net/category_s/291.htm
Fluidyne Radiator 93+ RX-7
Our Price: $475.00

it looks good. Features

* Fluidyne Aluminum Radiators Feature:
* 100% Brazed Aluminum Core (No Epoxy Joints)
* High Efficiency Air Fins
* Polished Aluminum Tanks
* Brackets, Hoses and Fittings All Meet OE Fit-Up

How is instillation?

We've installed tested & used ALL of these rads. - (been installing them on FD & FC RX7's over 13 yrs)
In order of preference:
1) MazdaSpeed Radiator- by far the best quality! and fits perfectly
2) Fluidyne - fits almost as well as the MazdaSpeed unit-also very well made
3) Koyo-either Koyo rad is good but fitment & overall quality is not as good as the others. Yes its cheapest- but in this case you do get what you pay for!

God I hope this doesn't turn into another thread of "known" shops pissing on each other with their e-peens about which radiator is best.

are all this mounted v or up right?

Most of the vmounts use the koyo I think. Truth is both the Koyo and Fluidyne are both great rads, hell even the stock one is great except for the end tanks.

It's just a matter of personal preference and experience with each one that people flog the issue over I think.

Search for an old thread by me where I discovered a fitup problem with my fluidyne that caused it to overheat. The upper hose connection tube welded to the top of the radiator on mine is too high. When you bolt down the stock air box it pinches the radiator hose. The fix was leaving the stock air box loose. AdamC has a fluidyne and his upper hose connection is clearly at a lower angle than mine so he can bolt down his stock air box without pinching the radiator hose. I don't know if mine was a unique manuf defect or if they changed their jig or welder had a bad day. I never pursued it with them. As I said the problem went away when leaving the airbox loose.

You can get a CSC all aluminum for less than $250 at radiatorworld.com. Reputable shops put CSC rads in cars as replacements all day long. My CSC radiator has kept the car frosty during autocross grid and traffic.

The only thing I didn't like was the poor quality drain o-ring so I replaced it with a tight fitting fat GM injector o-ring.

Fluidyne is only 38mm thick, both the Koyos are 53mm. I have done side by side testing and the Koyo always out performs the Fluidyne. Not to mention the quality of the Koyo welds and overall cunstruction are much better.

I have had Fluidyne welds fail, I have never had a Koyo weld fail.

I see absolutely no benefit to Fluidyne.

1. It cost a lot more than Koyo
2. Quality is not up to that of the Koyo
3. The petcock drain system lasts about two times before needing replacement
4. Considerably thinner than Koyo
5. Integrated mounting brackets look cheap when stood up for FMIC

Am I the only one to see this? Your a single turbo on the stock intercooler??? Holy hell, that thing must get heat soaked on one pull!

What's the fitment of the koyo radiator in the stock location? I have a Greddy SMIC and I wonder if the thickness of it will cause problems with the intercooler.

I'm pilfering the following from an ancient thread I started:

I ordered the "medium" unit from RadiatorWorld, and they eMailed me 4 days later to tell me they couldn't get it anymore. I'm glad they did 'cause I found the same thing on eBay for $160 shipped.

My only complaint about it is that the upper mounting ear tab things aren't very sturdy, and I had to trim some metal off the outsides of 'em to get it to slip down between the frame rails.

93rx74lyfe< you are right. i will be upgrading my inter cooler soon because it does get very hot. my air temp is 56 so says my PFC. here are some pics of my current set up

aside from upgrading inter cooler, radiator, what do you guys think about a vented hood?

lol crazy engine bay never seen a big ass single on a otherwise pretty much stock setup

93Fd4life> lol , you have to hear her on. she has a port mounter so she sounds nice. slowly I'm modding her.

what do you guys feel about the "Koyo R1443 Aluminum Radiator 93-95 RX7". RX7store.com has it for $299.00 and they say it "offers 30% more cooling than standard radiators"

The main benefit the fluidyne has is fitment. If you have a med SMIC or larger you are going to have a real hard time fitting that sucker in properly.

I will say that a fluidyne does its job just fine for a street car. It keeps my car hovering around 80-85C on days less than 80F. But then again so does the stocker.

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