Did very little to get it in there, height and width same as stock for my '72 SBC L48 car.....it basically sets in the stock rubber U mounts with very little effort it maybe 1/8 inch or so too wide, but not an issue really....the thing being more narrow, I just took some heavy hose pieces, and tie wrapped to the upper/lower supports to keep rad in place, being as it's thinner, and mounted to the rear, it leaves lots of room for that go to hell engine oil cooler that I freeze my auto trans with.....

 

Here is the numbers off of my spare Lincoln MKVIII fan... Just FYI




Not sure if its a "2 spd" or not...I doubt it. I really don't think any of them are. I may test it one day for curiousity.

 

JIM999 I give you the bats warm and fuzzy weak in the knees award for an engine I am jealous of, always wanted one of those lil blowers so darn sweet.

Alan, your engines bb you said Dewitt's radiator but I thought bb didn't have a filler cap, or did they get them later on I have 69,
very sweet install,


I pretty much studied this all night, made my head hurt,

I still cant prove it 100% but I also have doubts that any true mark viii fans were two speed, I believe the confusion comes from a certain cougar t bird fan than used both the mark viii blade and shroud but a different 2 speed motor.

but if someone has a two speed mark fan pretty sweet,

Since these mark fans,( likely biased, poorly detailed testing aside ) put out at least 3000 cfm to cool the way they do and likely closer to 3800 cfm and reports of their amp draw got me thinking of controllers,

I then putzed around in internetland and found a cat who being sick of electronic controllers that failed him made a multi step relay controller,

it bit large and cantankerous for me but I love it when people make something like this,




In my case I do not like the all or nothing fan switching, these fans do spike when they come on but if the system is up to par its not a problem but even with my Taurus fan it stayed mostly on lo and hi when it did kick on was pretty loud, and if I didn't need hi I did want to run it so I liked the simply relay set up for my 2 speed Taurus,

I was going to use dual 12 derales, use relays to run them both low in series or both high in parallel but the gears in my head grind ADD OCD and now I want that big old mark viii and a couple years of them are the big mac daddies, I guess I have to hit a u pull it bone yard,

but one speed, I cant do that, too OCD,
Nor do I want that cool stepped set up relay controller that other cat made,

I looked around at electronic controllers, and of the big names none where what I desire, for one while I have used them I do not like sensors that are capillary tubes, worse I'm not pushing that between the fins of my expensive radiator and asking for it to leak,


I think I might have found it, not cheap,
Auto cool guys, offers a electronic controller, no relays, it runs the fan just enough to keep the temp steady,

If your cooling system isn't up to par you might not like such a controller but I am overkill all the way, and should work nicely, it has single or dual fans outputs, AC input that is adjustable for fan speed, an override for a switch and adjustable turn on etc,

The 125 amp is 200.00, ouch, but even I cant always play it chespo,

 

I was thinking the mark viii fan the newest one is 19 years old,

When i got my Taurus fan it was new from autozone, but i cant find a store that sells the mark viii new, only a couple on ebay and one isnt really from a mark viii,

Finding one might put a kink in this, but in 20 years is there some other production fan that puts out big cfm,

And someone tell me since aftermarket fan companies loose money if cats buy junk yard fans, they have an invested interest to make high cfm fans, why dont they?

 

Yes my Dewitts has a filler cap. My car is originally a SB car, so I ordered a SB radiator so I wouldnt have to mess with the expansion tank.

You can still find the Lincoln MKVIII fans on ebay. I found 2 of them last night.

http://www.ebay.com/itm/1995-Thunder...JYMl2u&vxp=mtr

http://www.ebay.com/itm/1993-1996-Li...hY4brk&vxp=mtr

http://www.ebay.com/itm/Lincoln-Mark...3D112401129522


http://www.ebay.com/itm/Radiator-Eng...3D122462562693
However, you can not buy the fan assembly new, you CAN get the motors new from Siemens. VatoZone sells them for $78.

 

I tried looking but couldn't find it.

Might be worth it to have a spare.


However, you can not buy the fan assembly new, you CAN get the motors new from Siemens. VatoZone sells them for $78.[/QUOTE]

 

http://www.autozone.com/cooling-heat...coln/mark-viii


Looks like VDO is providing them now for AutoZone. 9032 is the correct part number for the Siemens motor, or it used to be anyway.
http://www.ebay.com/itm/Engine-Cooli...-/252069109546


Siemens....maybe
http://www.tek4appliances.com/product/SIEMENS_PM9032/

 

That part 9032 appears to be for a 1993-1996 mark viii fan.
I guess my next task is to try and find a MOTOR for a 1998 lincoln fan part number RF-64 and/or F8LH-8C607-AA. If I find a motor for it, then I will update this post.

 

I'm sure the motors are the same... both of my fans motors look identical. The Siemens motor in the pic I posted above looks identical to the VDO motors other then the white plug on the VDO.

I'm sure any of them will work fine. They are probably all superceded to the VDO 9032 now. VDO probably owns Siemens or something now.

 

Mine is single speed. I bought it new for a 1998 Lincoln Mark VIII. Part number for mine is F8LH-8C607-AA and/or RF-64. I bought it NEW from autopartsgiant in 2007 specifically for a 1998 Lincoln Mark VIII. No longer available.

I am now confused about whether any of these real Mark VIII fans were multiple speed ???

IF all Lincoln Mark VIII fans were single speed, THEN I can accept that even the 97 and 98 fans used the same motor; HOWEVER if the earlier (93-96) were 2 speed (not sure anymore), THEN I would not expect the motors to be the same since they would need different windings.
Do we even know anymore?

 

It is very confusing even to the guys out in netland posting they are ford fan experts then posting contridictions site to site post to post, drives me nuts, lol.

However, what i laerned and what makes me about 90% sure at this moment on this is NO true Lincoln mark viii fans were 2 speed the confusion comes in part and as example the ebay links alan posted, the 2 speeds are not mark vii fans, but the blades and shrouds are mark viii, as ford mixed and matched blades , shrouds and motors,
They were on cougars, t birds, but not marks,

There is part number listings online but i want to check those again motor part numbers of fans people tell me they personally removed their fan from a mark viii,

My research tells me the 97 98 mark viii are the ones to have, while cfm is never listed and when it is varies greatly on the net, the rpm for the 97 98 is greatest, if we believe what is listed,

But wait, not that simple,

I pulled the following from a fan expert site and it clearly shows they believe the 97 98 the most powerful in rpm yet is 2 speed and a true mark viii fan, so my ADD OCD keeps my confusion thriving

If i grab a mark viii my OCD dictates it must be that higest rpm one,

And i go right back to these are 20 yo fans, some newer as good or better has to be out there,

Alan,
I too have a sbradiator dewitts in my 69 with 454,
I love your fan fit and would assume i could get the same good look wuth mine....
Does the bottom hose come near the fan shroud?
Thanks

 

Not at all. The ribs on the fan housing are a little close to the sway bar, but they can easily be notched if you have a big sway bar.


With the fan shroud centered on the radiator, there is about 2-3" of open radiator core on each side of the shroud, so its a good distance from the radiator hose. I've posted a bunch of pics on this thread and Jim's thread, top and bottom pics.

One of my fans is a 93'(on my car) and the spare is a later model I believe, and they feel/sound about the same when powered up.

I'm with you, I don't think there was ever a "2 spd fan", it was just different types of fan controls through the years... My **** runs full blast all the time, just how I want it.

 

Did you have to trim the shroud shorter?
Ill go back and better study your pics in this thread,

On the two speed confusion,
Perhaps it IS two speed but not from 3 leads but rather from the cars computer fan controller, that could very well run a single speed fan at 2 different speeds,

I still would bet there is something else out there that moves a lot if air but not discontinued and hard to find,

 

This one is a 2 spd, with no controller so...that eliminates my controller/PWM theory.

 

I did not trim my shroud at all on my fan in my 71', other then cutting the mounting ears off flush.

On my spare fan, I did trim the shroud down about 1/2" or so.

 

Sorry, The video doesnt prove much to me besides the fan in the video is 2 speed,
Unless its yours and you pulled it from a mark viii.

I have seen a lot of the cougar and t bird fans advertised as mark viii, they have the same shroud same blade but different 2 speed motor like in my taurus fan,

Which if there is no mark 8 2 speed fan what dewitts mistakenly called a mark 8 fan in his lab test was actually the cougar, t bird fan or even the Taurus fan, easy mistake to make, which is admitted to not move as much cfm as a mark 8 fan, and i have seen those results reflected with my own taurus fan, on high it very well is a bit less than 3k cfm....

My dewiits radiator while sb is custom bigger tubes so now i wonder if the core is thicker

 

My gosh, Bill Nye The Science Guy would be soo proud of this thread.

A simple question turned into a show.

93 Ford Taurus 2 speed fan installed along with a 3 core Champion radiator to cool my 454 conversion 76. Low speed comes on at 180 with a thermostat, High speed comes on when I want it to with a switch on the dash. So far cools pretty good over the last 3 years.

 

Yeah, but i like this type show

So i emailed the hollister road company
Who seem to be rather into these ford fans,

I was told in his time working in the biz he has seen only one true dual speed mark 8 fan. So i am good with that,

Next he said they suggest the 94 thunderbird fan, and assured me it is the same cfm as any of the mark 8 fans,
Great part its out there new under 100.00,

The rpm and blades vary, the blades for noise the rpm so the less noisy blades still make tge same big cfm,

This is a true 2 speed 3 wire fan so how a person controls it is up to them,

The confusion for me is a bit more clear,
Going to order me a t bird fan....

 

I have a 96 Cougar fan in my 76. Probably the same as the T-Bird fan. Two speed, works great and is extremly quiet. I had an aftermarket Flex-a-lite dual fan in there but it was too loud and was interferring with the upper control arms.

 

The comment about a 94 tbird fan could be relevant. If we can get the part number for the motor of the T-Bird elec fan, then we can compare it to the part number for the motor of the Mark-VIII fan.
NOTE: I looked up that 94 Tbird fan on rockauto:
For a 4.6L Tbird here are the part numbers:
Fan assembly- F4SZ8C607D
Fan motor alone-FS3U8K621AB(and alt number mentioned-F23U8K621AB)
Fan assembly prices range from ~65 to ~95 bucks.
Per the autozone website this fan fits the following vehicles:
94-97 Tbird and 94-97 Cougar XR-7 (with specific engines so crosscheck)


Here is a link to the thread where I opened up the inspection cover on my new fan that shows the center terminal doing nothing. I was really confused when I bought it because of all the misinformation.

https://www.corvetteforum.com/forums...ii-wiring.html