My FD will be in for a rebuild soon and wanting to avoid needing a rebuild again im trying to do everything possible to extend the life of it - so thinking improved cooling for one. Im looking to replace the standard radiator with an aftermarket one.
So which is the best one to go for?
What things should I be looking for?
Ive noticed Koyo do a Copper one and Aluminum? Then 2 row or 3 row? What difference does this make? Are Koyo any good? They seem quite a bit cheaper. £235-340
Others ive seen are Blitz and Greddy - £350-400
Any advice would be really appreciated as its getting near to D Day and I need to get these bits delivered
Thanks
If you don\'t have a FMIC the stock one is very good in the stock location.
Might be worth gettign that flushed, cleaned and pressure tested.
I have an ARC one and its very good,but not cheap. Keiron is right only worth doin if you get fmic.
Jay
My stock one started leaking so I thought might as well take the opportunity to uprate it. I got a PWR uprated aluminium one from Reworx for just over £400 delivered to my door. Its very light and holds much more coolant being 39mm thick. Replaced all the hose spring clips with jubilee clips while I was at it. It fits in the stock location and nothing else needs altering.
I have got a Trust FMIC.
So is this worth doing then? As in nearly £400 worth of reason? ;) I really want to do the best I can to prevent the engine needing a rebuild. Ive even bought a Carbon Fibre Bonnet with a scoop in it! Thinking Water spray as well perhaps?
I did it just for peace of mind and have a SMIC. The price for a standard Mazda radiator is over £300 so I thought I\'d pay a little more as I intend to keep the car a long time.
And when my battery is moved to the boot and I have a single turbo I\'ll be able to see it in the engine bay, looks the business.
I run the PWR rad from RE:WORX its spot on. :wave
i have a koyo one made from aluminum and i dont think much of it, my car heat soaks in traffic this could be due to the size of the rad being so big that the factory water pump cant pump the water out of the rad fast enough or somthing to do with my pullys which makes the pump slower so it dosent cavithat (if i spelt that right) at high revs. then again it could just be my car.
Look at getting an Electric Water Pump( EWP) fitted mate, my temps stay below 70c. I do have a PFC so I can always see intake and water temps.HTH :wave
another vote here for the PWR rad. Fit and forget.. just how it should be :)
Quote from: Erdini have a koyo one made from aluminum and i dont think much of it, my car heat soaks in traffic this could be due to the size of the rad being so big that the factory water pump cant pump the water out of the rad fast enough or somthing to do with my pullys which makes the pump slower so it dosent cavithat (if i spelt that right) at high revs. then again it could just be my car.
Hi Erdin,
Real puzzled that you feel your water pump can\'t keep up, I ran a HUGE rad that was twice as thick and also dimensionally bigger than a KOYO on my car and the only problem I ever had was getting the car warm enough to open the thermostat !!!
I did however deliberately ran a standard size water pump pulley because as I have often said, under drive kits are to stop cavitation at high revs on race cars and not FD\'s sitting in traffic ticking over on a hot summers day when they need all the water flow they can get !
BTW, my company has sold quite a few Koyo Rads with never a problem or any kind of complaint and also as one of our here members knows from when I fitted a PWR rad for him, I was absolutely appalled that the thing did not want to fit in any shape or form without lots of modifications, i.e. butchering the thing in, indeed if he hadn\'t have needed to drive away I would have sent it back and fitted a Koyo.
Hopefully this was just one of a bad batch and the guy was just pain unlucky as I must admit I have never heard any other complaints about PWR.
In your honest opinion do you think it is worth paying the extra £150 than buy a Koyo? Are they as good? I dont mind saving a bit of money but not at the expense of quality / capability
Thanks
Quote from: cliveBTW, my company has sold quite a few Koyo Rads with never a problem or any kind of complaint and also as one of our here members knows from when I fitted a PWR rad for him, I was absolutely appalled that the thing did not want to fit in any shape or form without lots of modifications, i.e. butchering the thing in, indeed if he hadn\'t have needed to drive away I would have sent it back and fitted a Koyo.
.
Personaly I would only go for the big Alloy Koyo rad out of the Koyo\'s you mention but bear in mind that what I said in that the PWR rad could have been just a one one off bad luck thing.
Lets see what is said by other people as for all I know some may have had a bad Koyo as well.
I\'ve got a copper Sugita rad with a Greddy FMIC and I see water temps of around 79-85. Creeps up to low 90s when driving hard.
Quote from: clivePersonaly I would only go for the big Alloy Koyo rad out of the Koyo\'s you mention but bear in mind that what I said in that the PWR rad could have been just a one one off bad luck thing.
Lets see what is said by other people as for all I know some may have had a bad Koyo as well.
The problems you had with the PWR rad might have been because there are 2 types, stock replacement and race. The first one is 39mm thick and I think the race one is 57mm. The stock one is a straight swap and holds about a litre or so more than the mazda OEM rad. I changed mine with no issues in my garage.
The race one is considerably bigger and requires a bit of fiddling to fit in a standard car.
Hi Clive, ya i do think you may be right it probebly is the under drive pullys so im gona upgrade to a ellectric water pump in the near future and see how it goes, the pullys dont seam to be helping when your at high revs for anylong time.
thnks
Erdin
Quote from: cliveHi Erdin,
Real puzzled that you feel your water pump can\'t keep up, I ran a HUGE rad that was twice as thick and also dimensionally bigger than a KOYO on my car and the only problem I ever had was getting the car warm enough to open the thermostat !!!
I did however deliberately ran a standard size water pump pulley because as I have often said, under drive kits are to stop cavitation at high revs on race cars and not FD\'s sitting in traffic ticking over on a hot summers day when they need all the water flow they can get !
BTW, my company has sold quite a few Koyo Rads with never a problem or any kind of complaint and also as one of our here members knows from when I fitted a PWR rad for him, I was absolutely appalled that the thing did not want to fit in any shape or form without lots of modifications, i.e. butchering the thing in, indeed if he hadn\'t have needed to drive away I would have sent it back and fitted a Koyo.
Hopefully this was just one of a bad batch and the guy was just pain unlucky as I must admit I have never heard any other complaints about PWR.
I have an ARC one and its huge. Dont know if there is different types but Ive never had problems with temps, even with the intercooler blocking it.
Quote from: Frankie RXRThe problems you had with the PWR rad might have been because there are 2 types, stock replacement and race. The first one is 39mm thick and I think the race one is 57mm. The stock one is a straight swap and holds about a litre or so more than the mazda OEM rad. I changed mine with no issues in my garage.
Thanks for clearing that up Frankie. If you had trouble fitting it clive it mustve been the race job which is the 57mm core. The stock replacement (which holds over a litre more than the stock rad) is just that - a straight replacement!
We used to sell the koyo\'s which we paid less for and made more on - now we sell PWR....
All PWR stuff is hand built in aus to a very high standard - abel ran PWR chargecoolers on what it still (I tihnk!) the fastest RX7 in the world - the products are without question first class.
At the end of the day a stock rad in perfect nick in the stock position should work fine...
R.
clive is it poss to run standard sized pulleys after removing airpump..i have the greddy blue pulleys on mine but want to return to standard size to keep water temps down..i have pwr rad but big fmic on cruise i see 88-89 but rises rapidly in traffic and rises up to 95 when my fans kick in..are the standard pulleys larger or smaller than the underdrive ones and is a special belt needed to run standard pulleys with no airpump
Quote from: rx7veilsideclive is it poss to run standard sized pulleys after removing airpump..i have the greddy blue pulleys on mine but want to return to standard size to keep water temps down..i have pwr rad but big fmic on cruise i see 88-89 but rises rapidly in traffic and rises up to 95 when my fans kick in..are the standard pulleys larger or smaller than the underdrive ones and is a special belt needed to run standard pulleys with no airpump
Stock pulley is smaller and this means it runs faster and yes there is a shorter belt avalible but these are special order as they are not a conventional belt length.
i have 2 pulleys the alternator and water pump do i need to replace both and how much is a replacement belt to run it all..thks
All you need is a standard pair of pulleys, I am sure if you post in the wanted section you will get a pair from one of the guys who have changed their pulleys for an underdrive kit.
clive how much is a belt is it a mazda item or a multi fit tks
I\'m running FMIC and Koyo rad. With low-temp thermostat, water- temp never go past 80°C even running high speed 260-280km/h on autobahn.
I highly recommend the Koyo alu rad.
REgards
Iwan
I have a FMIC intercooler and Koyo Aluminium rad on my other FD;
http://www.mazdarotaryclub.com/forums/showthread.php?t=20028&highlight=immaculate
During spring and summer when I had the Koyo Rad fitted; IIRC I never saw temps go above 90 degrees on a hot day in traffic. On the motorway, around 83 degrees. The rad seems to play very well with hard acceleration, fast driving.
Have not driven it lately so I cannot comment on winter driving.
HTH
:)
freddy did u have a underdrive pulley kit on yours i think i see higher temps because pump is running slower
since ive spoken to Pip, he says the Koyo rads are excellent - he can supply them too :)
Quote from: rx7veilsidefreddy did u have a underdrive pulley kit on yours i think i see higher temps because pump is running slower
Not on this one. I do on my two tone FD on which I see higher temps with a similar sized ali rad and fmic.
HTH
must be the pump running slower due the pulleys then..dont think i need the pulleys as it only a road car not track or 1/4 miler..was running 496fwbhp till 2 tips said bye bye
Quote from: \'M@r{\']since ive spoken to Pip, he says the Koyo rads are excellent - he can supply them too :)
Did he say how much ?
Gareth
Quote from: rx7veilsideclive how much is a belt is it a mazda item or a multi fit tks
The belts are a special order only and non Mazda.
We have 2 in stock £18 each inc Vat n Delivery. ( loads cheaper than an underdrive kit normaly required to remove your air pump :cool )
Hope this helps.
Quote from: gmogleDid he say how much ?
Gareth
We used to sell them for a bit more than the stock PWR one and a bit less than the pwr race one, but we didnt import them ourselves thinking back; I\'d guess about 400 inc vat mate?
I didnt talk prices with Pip. If they are £400 then I will probably get one imported. If this is the same one its only $280 and he quoted me $100 delivery!
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=8022686729&sspagename=ADME:B:AAQ:US:1
If anyone is thinking of getting one let me know, perhaps we could get a deal for 2 or more?
Quote from: 20B_boyWe used to sell them for a bit more than the stock PWR one and a bit less than the pwr race one, but we didnt import them ourselves thinking back; I\'d guess about 400 inc vat mate?
clive so that belt will work with normal size water and alternator pulleys but i dont have the air pump is that still the right size thks
I have just bought a KOYO rad on US ebay for £280. pretty good i think.
Since i blew up my engine i have got a Uprated SMIC, and now the rad but i was considering getting a pulley kit too.
But reading this do you think it will be worth changing the pulleys or just getting a shorter belt as you said clive.
I have read people using an electric water pump, how much are they? are they worth it?
:driving :wiggle