racerboy8

Stock fans won't fit so I installed two spal slimline fans on my new koyo radiator. I am going to have to hard wire my new fans to the old stock harness which means cutting off the old harness and wiring it into the new fan wires. I am wondering what these 4 wires do that run to the fan motor. There is a yellow/white wire, blue/pink wire, red/yellow wire and a Black wire. I am sure that black is ground but can someone tell me what the others are? PLease help. Thank you If all the rest are low med. and high speed wires I should be able to twist them all to gether and run one high speed right?

CantGoStraight

I don't understand, I installed a Koyo (thicker than the Fluidyne) and my stock fans fit fine. Why don't yours fit ??? I think everyone else with the Fluidyne installation used there stock fans as well as us people that installed the Koyo. Jack


You may want to find the wiring diagram for the fans first.

Kento

Not unless you want to continually blow fuses. The relays are used for a reason. The SPAL fan motors are probably not wound to run in multiple configurations for different speeds; they're probably only one speed, and that's it. Just get a wiring diagram and find out which wires would be hot for low speed.

racerboy8

My stock fans fit on the radiator but if you talk to any company that makes the fans if there is even a slight gap inbetween the fans and radiator your not getting the correct pull. We had a demenstration done to show our company the difference. Beleive me it is huge. So if you have any gap between your fans and the radiator thats definetly not good. I have a gap. There for I am not using them. Besides if you ever look at the cfm of any stock fan that comes on any car it sucks. My one 11" spal pulls 1170 cfm/fan. So while the stock probably pull that put together I am pulling double. I hope to find a wiring diagram I have the manual but the digram sucks. Thanks for the help but if anyone knows let me know.
Thanks Adam

poss

iTrader: (5)

Actually, the stock fans in the FD are VERY good. And the stock fan shroud fits tightly to the radiator. I don't know where you are seeing these gaps.

airborne

Search is your friend:
https://www.rx7club.com/showthread.p...hlight=asp+fan

Try that -it concerns the brackets and stuff with the koyo. It may help you to mount it lower, letting the fans fit right. Whatever you do don't stress the fan shroud. It could lead to the fans jamming and the car overheating. I know. And theres a ton of threads about the stock fans/aftermarket fans/99 fan blades/etc... When it comes down to it there doesn't seem to be a great argument for replacing the stock fan setup. It just works.

Found that when I was trying to figure out why the duct for my ASP large IC wasn't fitting right.

Kento

Sorry, but just because the FD radiator fans are "stock" doesn't mean they suck--the cars have been basically running around with the stock configuration since their inception with no issues. Hate to tell you this, but the "1170 cfm/fan" figure of the SPAL fans was undoubtedly figured with zero resistance; that is, no obstructions in the airflow path. That figure drops like a rock when you put a radiator in front of it.
If you can't read the wiring diagram from the FSM, I would suggest that you find someone with basic electrical knowledge to do the wiring for you. All the information you need is there.

potatochobit

iTrader: (1)

airborne, you reveresed the top L shaped mounting brackets?


what does this mean? u moved the left one to the right side and vice versa?

jeffrored92

www.iluvmyrx7.com

Can download it here if you haven't already found it.

99gst_racer

Adam - I searched and found the basic fan opperation:

OFF - no relays
LOW - when relays #2 and #4 are active
MED - when relays #2 and #4 are active PLUS EITHER #3 OR #1
HIGH - when ALL relays are active (computer turns on #2 & #4, thermoswitch reaches activation temp. which turns on #3, and AC is engaged and running which turns on #1)

2 + 4 = low fan speed
2 + 3 + 4 = medium fan speed
1 + 2 + 3 + 4 = high fan speed

The ECU uses water temp as well as ELU (electrical load). This is why you can trick the fans on by turning on the parking lights. When #2 and #4 are active, the LOW is triggered at 221F (without electrical load). The MED comes on at 226F. And the HIGH (#1) is triggered my the A/C switch.


Does anyone know what color wire goes to which relay??

99gst_racer

Yes, that is correct. They are single speed fans, so we planned to wire the fans to kick on with relay #2 and #4, so they would blow full force at 221F.

Do you know where to find such a diagram? That is actually exactly what we are looking for.

Mahjik

iTrader: (1)

http://mahjik.homestead.com/files/ho...ng_Diagram.zip

racerboy8

kento,
if your not answering my question then don't even bothere butting in. I can read the wiring diagram just fine if I need glasses I will ask for yours! My book doesn't show the colors for the wires and were they ru. It is evadent that the stock fans work but spal work better. Face it the pull harder, if you don't think so go buy one and hook it up. by the way my spal fans I hard wired just to see how they would work in the hot temps and how they would pull for the people that were wondering. I ran water wetters mixed with just water, it was 94 degrees here yesterday and I drove the car hard. With the new radiator and coolant it took forever for the car to even reach 200. Then I let it idle for 15min so it could reach 221 and then I kicked the fans on! It went from 222 to 200 in like 30 sec. So anyone who has a problem with me running spal's can keep it! Thank you paul for the help and everone else for the good links and info. Now I will look at everything and see how to wire these babies the correct way.

KevinK2

the ciriani web site has the wiring diagrams. some control wires to the fans are voltage, some are switched grounds.

fan cfm is rated at various pressure drops. amps will be a good indicater of flow capacity.

a second gen (or miata) thermo switch should change set point from 221F to ~205F

G's 3rd Gen

iTrader: (11)

Has anyone rewired the fans to a three way toggle switch to control speeds? My relays are gone from the wiring harness and I am trying to figure out how have the fans on low all the time but have the option to raise the speed to medium or high if need be.. I know this will take alot of wiring and aftermarket relays and such but is it possible? My fans are 94.. yellow, blue on the topside of each motor and black and green wires on the lowerside.. My car was put together w/ the fans running all the time on low speed..Directly hooked to a 12v swithed ign. source. Now that it is getting warmer I need access to the higher speeds. Dont ask why its like this . The dumbfuck that put it together did it this way..