No, not jumping camps but that electric fan thread got my OCD fighting it out with my ADD with a bit of curiosity tossed in,

I did both some forum and google hunting but didnt find what i desired in fact i find all the misformation and contridictions a bit overwhelming,

I did some fan testing several years back with a Taurus 2 speed fan, even though i see posts saying no taurus fans were 2 speed, i have one,

Ford made matters worse they mixed motors, blades and shrouds,
No one seems to agree on cfm,
But it does seem the Lincoln mark is the one to use with early marks being 2 speed later marks being single speed or variable controlled by the cars brain,

So i am courious, who here runs a ford fan, and what modifacations did you do to the fan to fit, how do you controll it,
What radiator are you running and are you bb sb or?

What other mods do you have that might matter like spreader bar,

Seems good to have a fresh thread with this in one place.

Thanks
Cheers
B

 

406, alum 2 core rad. Focus fans kept it cool, granted i didnt sit in bumper to bumper traffic, not sure how well they would have done. With plans to get AC working I am upgrading to Volvo fan and pan shroud. I also have a Taurus fan on the shelf that is 2 speed.

 

Is the Volvo fan now thought to be better than the mark fan?

 

no it is comparable to the Taurus just that it can be unbolted from factory shroud, you can grab the Volvo relay and have all factory plugs for a clean install. Easier for me to find also, I never find the mark fan.

 

Is the volvo single or two speed?
What year model volvo?
Thanks,


I dug out my Taurus 2 speed fan, so the volvo is larger cfm than the Taurus?

 

I have what I believe is a 2 speed Taurus fan sitting in my garage. How can you tell if it's 2 speed?

 

1980 vette 350 hp cast head sbc with headers. Factory water pump, with new 3 core copper rad with shroud. 18" nylon 90 degree flex fan and a 195 T stat. Car runs at 195 all the time, you can watch the t stat open and close on the gauge. Never over heated etc. 195 is normal operating temp. I have seen more electrical fan issues and cars stranded because of them. i will always run a mechanical fan.

 

Cooling problems are solved by having a radiator properly sized that can shed the heat of the coolant under all driving conditions. That's why aluminium rads are so popular because they do this very well and will solve most over heating problems, like plugged rads, with or without electric fans.

 

It will have 3 lead wires

Thanks but this thread wasnt about dissing electric fans, they have been factory on most cars for several decades and of all the cars i have seen stranded only one was a fan fault, and it was a techs fault not the equipment,
It was my c4 corvette, a tech shorted an aftermarket controlled that when wired correctly never had an issue,

electric fans have a stella track record,

With that said if you like you set up i fully respect that, now back to the threads topic.....electric fans, specifically ford,

Thanks all!

 

No where in my orginal post did i say a word about cooling problems,
Of course aluminum aftermarket radiators being larger than stock and in many cases overkill solve all kinds if cooling system issues even when the fan used mech or electric is of itself too small, a larger radiator is more forgiving.

https://www.corvetteforum.com/forums...ed-topics.html

I posted this to hear from guys using ford electric fans, not to debate ele vs mech if you want a thread hearing from guys who like mech fans please post a thread and go wild,

Thanks,

 

94 Taurus 2 speed fan, copper brass 4 core radiator, low speed comes on at 190. hi speed at 205, hi comes on with AC. Small block w/vortec heads mild cam. No heat problems.

 

Very interesting, thanks for sharing,
Are you auto or stick and whats your climate?
Does hi kick on much?

 

Haven't tried to put one in a Vette yet but the Taurus fan has really done a great job for this one. When the 6-71 went on it became a problem to keep cool. Stock small block radiator with the fan (wired for high speed only) kept water temp below 205 after a half hour traffic jam on a 106 degree day.

 

Thanks, just the type info i made this thread for,

I have my Taurus fan out of the shead on the bench, the shroud was what i didnt like...hum

 

I had to cut down the depth of the shroud so I could clear the blower belt. The mounts are just bolts through the shroud into rigid brackets (top and bottom). Not pretty but very solid. I still need to seal it to the radiator with some foam but it's worked so well I've been slacking.

 

2 speed, 16ish in, same cfm, 92+ 240,740,850.. if in doubt save the pic from the other post to your phone.

 

I have a 1998 Mark VIII fan, part numbers RF-64 and/or F8LH-8C607-AA, only has leads connected to the 2 outermost male terminals. I bought it new. It is cooling a Ram Jet 350.

It apparently is a single speed fan that would normally be varied by the lincoln powertrain controls.

I had a PWM on it for a while before I installed the EZ-EFI 2.0. I am now controlling it with the EZ-EFI 2.0.

I have it installed on a Summit Radiator. The shroud is not trimmed. The fan "legs" were removed and I made my own brackets to mount the radiator and made my own brackets to mount the fan.
The fan fit snugly in front of the sway bar. I was going to trim it but it was minimal interference so I just let it be. There is no issue with the spreader bar. It has been there for 10 years.

 

From what I've learned:

• The white connector on the Mark VIII is the better (fastest RPM) fan vs. black connector. White connector Mexico, Black is Canada.
• No Mark was ever a two speed, just variable based on factory controller
• The Mark can have a three wire plug but third wire isn't utilized inside the motor housing, both hots are just tied together
• A fan for/from a 97/98 Lincoln Mark VIII will yield the fastest turning/highest CFM of any other version/year

Did you see this already?
http://http://www.thehollisterroadco...VIIIrelay.html

There are about a dozen Taurus fan versions for the Taurus/Sable and over the years Ford and the aftermarket have made changes to lower cost and increase durability. This label of Taurus that covers maybe 10 different versions leads to most of the confusion about the fan. Some of the Taurus/Sable fans use the Lincoln motor but most do not and no Taurus/Sable fans use a Mark VIII motor. If you want to find out what motor you have find the RF number like RF24, RF123, RF64 and so on or get the part number, something like F7LZ8C607 AA then look it up on Rock Auto.

With that said the Lincoln and Taurus/Sable fans are not the only high CFM fans Ford made, mine is from a 95 Cougar RX7 which is a RF24. It’s a cross between the Lincoln Mark VIII and a Taurus. It has the Mark VIII blades and a motor more like a Taurus/Sable fan.

Fan Specs:

RF24
Thunderbird LX and a Cougar RX7 94-97 the motor in this fan only fits this fan no other models it has 3 terminals and is a 2 speed fan with low being 1350 RPM and high being 1780 RPM. The CFM is unknown. It measures 18.5 x 24 x 5.5 deep. The Ford part number was F4SH8C607AA it is now F4SZ8C607D.

RF64
93-96 Lincoln Mark VIII F3LY8C607A
93-96 fan spins 1100 RPM on Low and 1850 on High.

97's Lincoln Mark VIII F7LZ8C607AB
98's Lincoln Mark VIII F8LZ8C607AA, This one crosses back as a replacement for the F8LH8C607AA so it may be a single speed.
97-98 fan spins 1800 RPM on Low and 2225 on High.

F8LH8C607AA single/variable speed


http://www.pirate4x4.com/forum/gener...ctric-fan.html
"Well I have picked up 2 fans and they are just one speed, one from a 93 and 0ne from a 97. They both have 3 wire hook up but the 2 positive terminals are tied together inside the motor you can see if you look through the vents near the plug. I guess I will need a speed control to run one."

Single speed motor numbers.
93# F3LU-8K621-AA
97# F3LH-8K621-AB

2 Speed motor numbers I found off the net.
93-96# F3LY-8C607-A
The 93-96 spin 1100 rpms on low and 1850 on highspeed.

97# F7LZ-8C607-AB
98# F8LZ-8C607-AA
The 97-98 spin 1800 on low and 2225 on high.


http://www.dfwstangs.net/tech/markvi.../markviii.html
93-96 use p/n F3LY 8C607 A @ 245.80
The 93-96 spin 1100 rpms on low and 1850 on highspeed.

97's use p/n F7LZ 8C607 AB @ 196.23
98's use p/n F8LZ 8C607 AA @ 140.11
Th8LZ 8C607 AA @ 140.11
The 97-98 spin 1800 on low and 2225 on high.

They all look the same, all come with a shroud. The 93-96 spin slower according to Ford Motorsport Tech line.

http://forums.corral.net/forums/gene...s-1-speed.html
"My old "real" Mark 8 fan burnt out last week. This was PN# F8LH 8C607 AA, white plug, 3 prongs, amazing CFM. I bought a used fan from someone saying it was a Mark 8 fan, but the part number is F4SH 8K621 AA which has a black plug 3 prongs. My research tells me this is not an actual Mark 8 fan, but a fan for a TBird, which has 2 speeds. When trying it out using my manual override, the fan didn't spin anywhere near as fast as the white plugged Mark 8."

http://forums.tccoa.com/6-general-te...an-thread.html
There is a myriad of conflicting information on Mark VIII fans. Nobody seems to have it all right. I have read through 2 dozen threads and have called a couple shops that sell these trying to figure this out. Here are the results of my research -

I know for a fact that there are three part numbers for the Mark VIII fans as follows:
93-96 F3LY 8C607 A 1100 on low and 1850 on high RF123 Y=lincoln/mercuy
97's F7LZ 8C607 AB 1800 on low and 2225 on high RF56 Z=ford
98's F8LZ 8C607 AA 1800 on low and 2225 on high RF64 Z=ford

All these fans are single speed PWM controlled by the car. I believe the middle wires on ALL of these are either tied together at the motor; or don’t exist (It has been reported that 97 and 98 have only two wires in their pigtail).

There are several stock pigtails that have been reported as taken from Mark VIIIs:
2 black 1 green (all same gauge, blacks tied together at motor)
2 black 1 blue (all same gauge, blacks tied together at motor)
1 black 1 brown or orange 1 Blue (different gauges for the positives)
1 black 1 Org/Blk - Low 1 Blue - High (different gauges for the positives)
1 Black 1 BRN/Org - Low 1 Brn/Yellow - High (different gauges for the positives)


I don't believe that Ford was putting different harnesses in the engine bays within a model year and I doubt it changed between 93-96 particularly the ones that have differnt gauge wires. If this were true I have yet to see a wiring diagram that proves it.

Fan/Replacement_Motor/Vehicle Data:

RF123 75717 Mark VIII 93-96 (1-speed 18" ?)

RF24 75715 T-bird LX 94-97 (2-speed 18" ?)
Cougar XR-7 94-97
(maybe others)

RF125 other Taurus GL 90-95 (2-speed 16" ?)
Taurus L 91-92
Taurus LX 90-95
Taurus SE 95
Continental 90
Continental Executive 91-94
Continental Signature 90-94
Sable 90-95
(maybe others)

And here's a CFM chart from DeWitts..unknown as to whether he tested the 1850 rpm speed or the 2225 rpm speed Mark VIII.
https://www.corvetteforum.com/forums...pal-duals.html

 

Are you controlling the fan as either on/off or variable speed using the Fast?

 

Hey Bats... let me know if you want my replies deleted for being off-track/distracting.

Jim