MMoore4545

iTrader: (7)

The previous owner thought it was an awesome idea to leave two of the clutch fan nuts off.
and the base of the nut on the opposing sides
were flattened from the vibration, and to top it off he hacksawed them and stripped them a little bit.



so I couldn't fit my nut splitter in there
dremel didn't fit
dremel extension barely fit, but was at the wrong angle, ate two bits..
my super pliers fit, and more importantly gripped, but I just spun the waterpump
made a "pulley" wrench with a bit of hose and a oilfliter wrench..
and made it work. took me way longer than expected to get them off. car was out of commission for a few days due to work/school.


anyways, it was suggested throwing one of those big aluminum direct drive (minus the clutch) finger chopper fans in there that you see on quite a few big V8's
but I figure it'd be a good idea to just go electric and get all that sorted out so I have room to work and so when my turbo gets purchased I'll have room to rout intercooler lines.
I know there is no hp gain from electric fans, and taxes the electrical system quite a bit.

I picked two up out of the yard, both in really good condition
one out of a '99 Crown Vic Police interceptor
18inch fan, not a huge shroud but it covers the whole radiator regardless, actually at the top of the radiator it over laps just a little, not the fan but the shroud, creating a 4>0 millimeter gap.





I also found the Famous two speed taurus fan off of a 1989-1993
fits perfectly

and a comparison (left Taurus and right interceptor)



also have a adjustable thermostat, with a push in type sensor. Which is going next to the upper radiator hose coming from the engine, the hottest point.
Was going to buy a relay for it, but it actually has a relay on it.



So the two questions I pose are.
Do I still need to run a bigger/separate relay? Seeing as the relay can handle a 30 when open? and seeing that it's removable should I throw one in the actual thermostat or buy a separate one

and which fan would yield better results? The perfect shrouding Taurus fan or the enormous 18inch Interceptor fan. I wouldn't think that the fan would draw too much more than the Taurus fan seeing as the motors are about the same size.

jackhild59

iTrader: (7)

My recommendation-Taurus Fan.


https://www.rx7club.com/showthread.p...ght=taurus+fan

If you are going to use hi-speed, you need an alternator upgrade. There are lots of ways to accomplish, FD/S6 alternator, custom rewound, Ford Tempo 3G high output-all discussed in the following thread.

https://www.rx7club.com/showthread.p...ght=taurus+fan

Good Luck!

Hypertek

iTrader: (3)

heres my setup dude.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/hyperteks-budget-elec-fan-install-811725/
I used different parts but you can get a good idea on how to mount the taurus fan.

I ended up not using a relay on mine since the controller has one built in, so it doesnt really make sense imo.
Just make sure you got the ignition trigger wire setup good


If you decided to mount the controller to the passanger side like I did *you can neatly wrap the probe coil up in a circle so you dont have to run it along the car*. You can tuck your wires in a hose and run it in front of the rad, it tucks away pretty nice and not too noticeable.
http://tunerbase.com/articles/010809/IMAGE_099.jpg

MMoore4545

iTrader: (7)

I see I'm going to have to upgrade my alt! which isn't a big deal.

So I suppose that it would also mean that the relay on the thermostat isn't going to work? being only 30a

Hypertek

iTrader: (3)

you should be ok with the low speed, alot of people just rock that one. Just put a fuse somewhere between your constant positive wire and the fan controller itself.

jackhild59

iTrader: (7)

It would work just fine for low speed. It would also work for high speed. You can't do both with just one relay or with an OEM alternator.

MMoore4545

iTrader: (7)

Seems like Hypertek and I are running the same style thermostat.
So I think I'll take your lead and bolt up a bigger taurus alternator.

how are you switching it between low and highspeed?
two thermostats at different temps?

jackhild59

iTrader: (7)

No. You cannot supply both the low and the highspeed terminals simultaneously. There must be an interlock to shut off the low when you activate the high.

There is a diagram in the thread.

The 3G Tempo is a better fit. The Taurus needs an adaptor. The 3G bolts right up. I would go this way if I did it again. Well, maybe not-the taurus alt was cheap and I am cheap.

MMoore4545

iTrader: (7)

ah I totally missed the diagram.
sorry about that.

I suppose I'll go to my pick-an-pull and grab a tempo alt
or maybe just get a re manufactured one, then again that requires a core..

I appreciate the quick feedback guys. thanks

Aaron Cake

iTrader: (1)

http://www.aaroncake.net/rx-7/efaninstall.htm

junito1

I Just installed a feiro fan on my car last week and it works really good.
It doesnt require any upgrades and it fits just asgood as the taurus.

rotorbugg

I wouldn't trust the 30A relay on the typical controller. You NEED reliability here.
Also, watch out for these points of failure: the fan motor, thermal sensor, controller, fuse, and EVERY connection between them.

junito1

30a relays seem to work great on every e fan except taurus.

TAurus fan is overrated and causes to many problems. Seems like everyone that got a taurus melted something. thats WHy i went fiero fan=D

Digi7ech

iTrader: (1)

I have a 70amp relay on it's way from delcity.net

I've been using a 30amp relay on the low setting without issue. High setting pops 30amp fuses pretty quickly.

I'll be upping my gauged power wires and using a 50-60amp fuse to see if it nears that amperage on high setting.

jackhild59

iTrader: (7)

No, it doesn't fit as 'good'. It doesn't even fit as well. It fits easily, but it doesn't cover 100% of the radiator. There is 2-3" inches of exposed radiator on each side of the shroud. The coverage is about 80%. The Taurus fan does cover 100%. Maybe there is not enough difference to matter, but when I calculate, 100% is always better than 80%.

Next thing: The Fiero/A6000/GM A-body fan pulls around 15 amps. The Taurus fan pulls 15 amps-on low. High speed is a 25 amp option that is available. I am quite sure that the Taurus fan moves more air on high than the GM fan. If you read lots of threads (and there are many) everyone who uses a GM fan is satisfied. Everyone who has a Taurus fan and runs it on low is also satisfied.

Not everyone needs a Taurus fan running on high.
Yes, you need to upgrade the charging system.
Yes, you need to fully understand wiring, relay and control principles etc. to use the Taurus fan on high.

B.F.D. It ain't rocket science.

People are afraid of what they don't understand. I am not a 'fan' of the Taurus fan. There are many excellent ways to E-fan a car. I just attempt to share what I know to educate and help people use what is dollar for dollar the highest performing fan available. This sharing of knowledge between members is the entire reason for the existence of this board.

This entire board is filled with members doing excessive mods to obtain excessive performance results. Why is an E-fan any different? People are more afraid of a Taurus fan than they are of upgrading to an aftermarket turbo! Way more engines are blown by uninformed ill prepped turbo or turbo exhaust upgrades than possibly other single mod, yet people are more afraid of Efans than of horsepower mods.

jackhild59

iTrader: (7)

I also found that a 30 amp fuse blew, but not right away. It took quite a long time for me in hot weather, but I wasn't on the racetrack either. I was using a fuse holder with 12 gauge wire that was rated for only 20 amps with a 30 amp fuse. I blamed the blowing on resistance heating in the entire fuse setup.

I currently run a 40 amp fuse in the stock under hood fuse block. It sits in the slot used by the ABS circuit on cars so equipped. It never has had any issue and has never blown. The OEM fan fuse spec'd for the Taurus cooling circuit is also 40 amps. This fact alone kind a screws the pooch for those 40amp+ claims, wouldn't you say?

Remember, I tested the Taurus fan and found that the high speed pulled only 25 amps, not the reputed 40+ amps repeated over and over on the internet.

I am also using a genuine Bosch/Tyco 20/30 relay. The relay has never been an issue and I bet that the quality of the Bosch/Tyco is such that it is more reliable than a Chinese made clone 'rated' for 30/40. The problem I had originally is the socket which had light 16 gauge wiring. The socket melted due to resistance on the crimp between the 16ga and the female spade connector. The relay never malfunctioned and it still works fine.

Once I rewired the socket with 10ga wire, the issue was gone. If I was going to use high only and wasn't doing the fancy stuff, I would use a SPST high amperage relay like you are planning. You could use one for each speed, then use a SPDT switch on you dash to switch the low current control wire from the thermoswitch-call it a high/low switch that doesn't carry the motor current, just the relay control current. Now when you get to the track, you can run high, when you leave you can switch it back to low. Full interlock so only one motor coil is energized at a time.

Digi7ech

iTrader: (1)

^yeah, I'm just going overboard because it will be a track/drift car here in AZ and cooling is #1.

I'm just doing a SPDT rocker for high and low. If I see temps rising them I'll just switch it over to high. I think I'm using 12 gauge right now.

I'll throw a 40amp in there first. If it pops then I'll go 50/etc until I find the right spot. Although a 40 will probably hold it.

glhs0867

The best E fan to use is one from a 80s Turbo Dodge. Mine cools my engine temps down in less than 2 minutes and thats with the guage reading 3/4 to hot. It brings it back down to the second line over cold. and they pull alot of air being designed for a turbo engine car,.

I have to shut my E fan off because it cause my thermostat to close, while driving..so thats my 2 cents worth.

junito1

80's turbo dodge mini van?

Here in town someone had an upgraded turbo 80's turbo dodge mini van and that **** waas fast!@

jackhild59

iTrader: (7)

Good call on the fan, if they are available in your local salvage.

I don't believe there is ONE fan to rule them all. If you understand wiring and control theory, properly implement the controls, almost any OEM efan will do the job adequately for a stock to mildely modified FC.

Fans that I remember that have been *pimped* on this board as the 'best'
80s Turbo Dodge
Chrysler minivan
Ford Taurus
Perma Cool 'finger-chopper'
Pontiac Fiero
Pontiac A-body
Ford Tempo-
Flex a Lite Black Magic

Fans that have been trashed for various reasons:
Perma Cool 'finger-chopper'-Chops fingers!
Ford Taurus-caused nuclear meltdown of all things electrical
Flex a Lite Black Magic-burns out early, too much money

Go figure.

Sounds like you could adjust your turn-on temperature and so integrate the fan with the thermostat a little better. On at 195 to 205 and off at 185 seems to be the consensus on this board. Try getting close to these numbers and it will work better.