metalCORE

iTrader: (2)

Hey folks,

i just want to replace my genuine fans with 2 Spal ones, just wondering as the Spal just have two pins (12V, ground i guess...), if there is any chance to put these into the OEM 4 pin harness and use them just as the standard fans...

I have an Apexi pfc, so i have set different switching moments anyway, but i guess i will have to use any of the 4 relays(up to all 4) to keep this function...?

I'm no electrician, so perhaps any of you have already went this route and could tell me which wires to use...

djseven

iTrader: (56)

Factory fans are a better option but do what you will. Sorry I didnt help you with your question but put the factory fans back on and be happy.

DaleClark

iTrader: (55)

I agree. The Spal fans will be MUCH louder, draw more current, and have a short life expectancy. Had friends with FC's try them back in the day, they're terrible.

The stock fans fit fine, flow a lot of air, are quiet, and do everything you need. Don't fix something that isn't broken.

Dale

turbojeff

iTrader: (30)

Not just jump on the bandwagon, a big problem with FDs especially is people modifying things with a lesser quality parts then wondering why they have so much trouble with them. The stock fans are what you need.

cptpain

iTrader: (1)

Im sure you can simply replace the OEM fan motors from Ray.


I cant stand aftermarket parts that are of lesser quality than OEM.

There should be absolutely NO REASON for you to go with aftermarket fans when there is absolutely no need for it.... the OEM fans fit in anyway you have your cooling system setup.

Would you want your car sounding like a hair dryer? or would you rather hear the noise of your exhaust?

jkstill

iTrader: (11)

+1 for replacing the OEM fan motors - pretty easy to do, and less $$ than Spal fans.

As for the noise, I have a 9" Spal fan on my IC to help cool down after autox runs, and it makes more noise than the stock radiator fans.

metalCORE

iTrader: (2)

Thanks for your comments guys, but thats not what i'm asking for. :-(

Reason for the change is the oem ones are over the hill, and both compared, there as loud as the spal ones. I guess the spal will flow a bit more, and even if they are louder, noise is not an issue.

Buying new oem ones is the worst thing i could do pricewise...so i bought the spal.

Second reason is i'm going v-mount soon, and as the spal are very flat they are a much better option here...

So no ideas about the wiring...? :-)

DaleClark

iTrader: (55)

Get a used set of OEM fans if yours are bad. You can probably pick up a good used set for $50-75 or so.

LISTEN to what we're saying, there's a reason NO ONE has recommended running the Spal's. No, they don't perform better. Yes, they're far louder. Yes, they will fail far sooner than the OEM fans (which almost NEVER go out).

Many years of wisdom here steering you in the right direction. Trust us.

Dale

RENESISFD

iTrader: (13)

^ How is a used set of fans from a 20 year old car more reliable than a brand new fan from an OEM supplier?

Why do you say spal fans inferior quality, they are an OEM supplier to many different industries.


OP, Have you checked the wiring diagrams in the tech manual directory? https://www.rx7club.com/3rd-gen-archives-73/tech-manual-directory-614824/


John

JM1FD

iTrader: (1)

I agree. Spal doesn't make junk. It is beyond me how anyone could think, especially given the continued if not increased use of electric fans by OEMs over the past two decades or so, that the art and science of fan building has not advanced in the intervening 22-25 years since Mazda sourced the fans for this car.

That having been said, the OEM fans are sufficient, and the control system was designed to prolong the life of the motors as well as keep the load on the electrical system as low as possible using a three speed approach.

Wiring SPALs in place of the OEM fans is going to require some careful analysis of the loads as well as control temperatures.

The stock "high" circuit would be your best bet in terms of current carrying capabilities, but you need to check the wire gauge as well as the rated current carrying capabilities of the stock relays. The SPAL fans that move enough CFMs for our application are going to eat a fair bit of current.

Using the "high" circuit means that you're going to have to do some wiring to get fans for A/C if you still have A/C, plus you may want to do some more wiring to drop the turn on temperature.

You really need to study the control systems, all the various triggers and temperatures, and wiring diagrams to do this right using the OEM wiring. If I were putting SPALs in my car, I'd ditch the stock relays and whatnot, and wire my own system from scratch.

JM1FD

iTrader: (1)

Having read SPAL's specs for various fans, the "very flat" ones tend to not move very many CFMs. You may have a problem there.