I am installing a new efan & koyo radiator and have a few questions. They may seem silly, but there is no such thing as a silly question when it comes to the pain in the *** FC3S. My car is a show car, so I am cleaning up the engine bay. These are my questions:

1. Shoudl I remove the AC fan & cooler in front of radiator? Are they restrictive?

2. Can I install the new fan to the AC fan circuitry?

3. What temp does the AC fan kick in?

4. Should the new fan bring cold air in or blow hot air out?

Also, check out these fans with high CFM and low amp draw at great prices.

UNIVERSAL COOLING FANS W/ MOUNTING BRACKETS
All Fans are Reversible - Either Push or Pull Type
PART # Size Clearance for Mounting CFM @ Amps Cost
CF9860 9" 9-1/2" x 10-1/4" x 2-1/8 998@ 6.1a 31.95
CF9861 10" 11" x 11-3/8" x 2-1/4" 1571@ 6.8a 34.95
CF9862 12" 11-1/2" x 12-1/4" x 2-3/8" 1617@ 7.0a 35.95
CF9863 14" 14" x 14-3/4" x 2-7/8" 2383@ 7.8a 45.95
CF9864 16" 16" x 16-3/8" x 3-3/4" 3025@ 11.3a 49.95

http://www.sherco-auto.com/fan.htm

 

1: Sure, as long as you never plan on using/having A/C

2: Sure, but I wouldn't.

3: Comes on whenever the A/C is on.

4: Won't matter, but mount it in a pulling configuration. Putting it in front of the rad will somewhat block airflow while cruising.

 

Sure, why not. Most RX-7's don't even have the AC fan.

I wouldn't... the fan you are putting in likely draws WAY more amperage than the stock AC one..
The AC fan probably ONLY kicks in when the AC is on... which is why its an AC fan. So... yeah, bad idea.

It should be blowing air toward the engine.. sucking it IN from the front of the car.

 

Thanks guys. Simple but important questions.

The AC fan is attached to a thermoswitch at the radiator fill gooseneck on a TII. When my car started heating up, the AC fan actually kicked in, so it is not just AC switch activated.

Is it worth it $$$$$ to get the AC functioning again? I live in Connecticut and don't need it much as the car is a show car anyway. The AC stopped working years ago!
I am removing it because from what I read, the AC system is prone to high failure on FC3S anyway.

What would it take to get it running again? I have all the components!

 

Do they add some restriction? Yes, but whether you decide to take them off should be based on whether or not you want functioning A/C. If you do, and you don't have cooling problems, then don't take it off.

No, a new fan should be wired completely independently, with a new fuse, relay and adjustable temp switch.

It runs any time the A/C compressor is engaged, or if the engine temp exceeds 207degF.

It should do exactly what the stock fan did...

Only you can make that decision. I'm sure you've been in cars with A/C, so you should know the benefits.

Dunno where you heard that, but the FC's system is no less reliable than any other car of the same age. Pretty much any system this old would have needed to be serviced by now. Most of the time the gas has simply leaked out due to age, as opposed to actual component failure.

Depends what's wrong with it. We don't know, so...

Actually in the US all Turbos and autos came with one, and I'm pretty sure all Japanese FC's had them, so that statement would be incorrect.

 

If you want some tips or information on how to wire up your electric fan, click on the "wiring an electric fan" link in my sig.

 

Functional AC does not require a dedicated AC fan.

 

If you are looking for an E-Fan you should check this out:
http://sneedspeedshop.com/store/view...idProduct=1015
This is one of the only E-Fans that I have found with a shroud, and the shroud is kind of important...

 

I have tried contacting sneed speed shop 4 times about their fan in the past year. They never returned my emails. I asked how many running amps it pulled.

Also, it says 2100CFM. That is most likley at ZERO static pressure. Put that on a radiator, and you are not going to drop that down to about 1600 CFM.

Do not get that fan and shroud setup. If you can, get ONLY the shroud and buy a different fan.

[Click on the "Electric Fan Comparison Chart" in my sig for more information..

 

I can't really say for sure, but the E-Fan that they use looks like it is the Proform Universal. I am not trying to stick up for them or put them down as I have never used there product, but if someone has please let us know how it works because it is the most complete shroud I have ever seen (and it looks nice too).

 

Mercury mystique/ford contour fans. Duals, small draw (running) and the shourd fits aside from being ~1" too long.

Taurus fan is also a good fit, apparently anyways, I'm using the above so I can't tell you.

 

The A/C's performance is significantly improved by having a fan running when it's operational, particularly at low speed. Airflow through the condensor is critical to the system's efficiency.

 

It seems sneed speed shop changed their fan. They had a different fan before. Still they say its 2100cfm

Thats a standard design for a lot of the electric fans out there. Many fans like look that.

 

the sneedspeed efan is nothing more than something you can build yourself for a little less money. its a zirgo fan mounted to a aluminum shroud.

i did the same thing here https://www.rx7club.com/2nd-generation-specific-1986-1992-17/efan-shroud-w-pics-waddya-think-542693/ and ended up paying about $40 less than that kit your willing to buy. i havent had an issue since the install and if you look at my pic, i have both A/C and P/S in humid NC with not a single prob. definitely go with the efan and shroud, but build it yourself if you have the time and know how.

go with the pull setting (like stock) and nothing bigger than 16" or it'll be too big.

 

Yeah, but mine was still completely functional and it wasn't factory equipped with it. Most US cars didn't come with one if I'm not mistaken... Even my auto 91 didn't have one. AC was pretty good for a 16 year old car.

I'm not debating it working at 100% efficiency, but its still functional without.

 

I never said it wouldn't be, and that's irrelevant to the discussion anyway, so I don't know what your point is. The question was about removing the fan and the A/C, not just the fan.

You are.

Actually I'll bet it did when it was new, it just didn't have it when you got it.

 

I'm sure things might be a bit different in NZ... but, both of the auto S5's and all three of the 91 NA's's I've had.. and the 86 base I had.... none of them had an AC fan.. and they were all bone stock when I bought them.

Sorry for going off topic.

 

How do you know this?

Zirgo fans are rated for way more CFM then 2100. They are over 3000 cfm.

 

I looked for the shroud only and not the fan, but didnt see it at speedshop there. I am in need of a shroud. Some of you will say make it, but where to start? Where to buy the material? Summit does have a universal shroud.

SUM-381101 $79.88
Estimated Ship Date: Monday

http://store.summitracing.com/partde...5&autoview=sku



Brand: Summit
Product Line: Summit Aluminum Fan Shrouds
Part Type: Fan Shrouds
Installation: Bolt-on
Fan Quantity: Single
Fan Diameter (in): 16.000 in.
Fan Shroud Height (in): 19 1/2 in.
Fan Shroud Width (in): 26 in.
Fan Shroud Thickness (in): 1.25 in.
Fan Shroud Material: Aluminum
Fan Shroud Finish: Natural
Quantity: Sold individually.

As far as the AC Service, well, I think I am up for the challenge on trying to service it and getting it working. I would have to reinstall everything. Where do I start from reinstallation? Freon? System oil?

 

i have a Q
does the KOYO have the spots for the stock sensors>?

 

I using the flexilight 180 (3300 cfm w/18 amp draw ) . This unit has a relay to run your fan when the A/C is on. I don't see a problem with running the fan in the same circuit as your A/C as long as you run a relay in it. Infact I just looked at a wiring diagram for a 2004 Honda Pilot and they run the the fan off a relay that runs in the same circuit as the A/C. No issues here.
Thanks Robert

 

S4 koyo only.

 

bump