Mark VIII Fan
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 3,503
Likes: 2
From: Raleigh NC
Mark VIII Fan
Anybody put one of these in? I measured my radiator and engine bay, it looks like a purrrfect fit.
It's an 18" fan. Estimates of CFM are between 4300-5500. Draws 42amps on HIGH speed--it is a 2-speed fan. 1100 rpm in slow, 1850 rpm in fast.
The shroud measures 19" high--my radiator is exactly 19" high. It measures 22" across--I measures 23.5" between the upper A-arms.
It's an 18" fan. Estimates of CFM are between 4300-5500. Draws 42amps on HIGH speed--it is a 2-speed fan. 1100 rpm in slow, 1850 rpm in fast.
The shroud measures 19" high--my radiator is exactly 19" high. It measures 22" across--I measures 23.5" between the upper A-arms.
Last edited by PhotoVette1; Jul 11, 2006 at 07:08 AM.
Pro
Joined: May 2005
Posts: 745
Likes: 0
From: Miami Florida
what a coincidence. im puttting the exact fan into my 82 tonite. ive got a bosch 50 amp relay and am goint to key it directly to ignition hot so the fan is on 100% of the time (miami). the plan was to hook another relay off of the ac clutch hot lead so it goes to high speed with the ac. however, it seems that it doesnt have a high speed. there are three blades on the fan. do you know the correct configuration for wiring the two speeds?
Burning Brakes
Joined: Feb 2006
Posts: 1,024
Likes: 1
From: AL
rastadr, consider connecting to the ACC terminal instead of the IGN; that way the fan won't be turning while the key is in the "start" position as it is cranking the engine.
BTW, where did you find this fan? what brand etc?
BTW, where did you find this fan? what brand etc?
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Racer
Joined: Feb 2005
Posts: 282
Likes: 0
From: chicago south burbs IL
ok i know the fan is going to work and the power i can deal with but how are you going to mount it can ya send me some pics or post some ? this was I want do it too.because im not happy with my current electirc fan setup 
Last edited by mrtroutjedi; Jul 11, 2006 at 04:28 PM.
Pro
Joined: May 2005
Posts: 745
Likes: 0
From: Miami Florida
all i know is bill from bills custom auto in hollywood fla specializes in stuffing huge big blocks into timy spaces and he says its the best he's ever used, even better than the biggest dual spals available.
Racer
Joined: Feb 2005
Posts: 282
Likes: 0
From: chicago south burbs IL
i just bought one from this guy it seems like a good price concedering I paid 125 for the 2 12" one I have now.
http://cgi.ebay.com/ebaymotors/Linco...QQcmdZViewItem
http://cgi.ebay.com/ebaymotors/Linco...QQcmdZViewItem
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 3,503
Likes: 2
From: Raleigh NC
Originally Posted by rastadr
what a coincidence. im puttting the exact fan into my 82 tonite. ive got a bosch 50 amp relay and am goint to key it directly to ignition hot so the fan is on 100% of the time (miami). the plan was to hook another relay off of the ac clutch hot lead so it goes to high speed with the ac. however, it seems that it doesnt have a high speed. there are three blades on the fan. do you know the correct configuration for wiring the two speeds?
Better go to the 75 amp relays and a diode--it has 100 amp starting current. I plan to use a pulse width controller instead.
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 3,503
Likes: 2
From: Raleigh NC
Originally Posted by rastadr
what a coincidence. im puttting the exact fan into my 82 tonite. ive got a bosch 50 amp relay and am goint to key it directly to ignition hot so the fan is on 100% of the time (miami). the plan was to hook another relay off of the ac clutch hot lead so it goes to high speed with the ac. however, it seems that it doesnt have a high speed. there are three blades on the fan. do you know the correct configuration for wiring the two speeds?
I'm guessing btw.
FREEWHEELING DIODE
Since the motor is an inductive load and an inductor is an energy storage device, when the contacts of the relay open, the energy that is stored in the motor has no place to go. The voltage increases (negatively) and a spark is created across the relay contacts, greatly reducing the contact service life. If a diode is placed (reverse biased) across the motor, it will not conduct in normal operation but will conduct when the relay contacts are opened, thereby supressing the spark. The current is said to "freewheel" through the diode and the motor after the supply current from the battery is interrupted. This voltage spike can get unbelievably high, hundreds of volts for a 12V system. Use a 1N5404 which is rated at 3A, 400PIV.
Drifting
Joined: Mar 2005
Posts: 1,806
Likes: 3
From: Burlington WI
Here is a link...
http://www.geocities.com/smithmonte/...rkVIII_Fan.htm
Why a Mark VIII Fan?
For severe cooling needs, the electric fan from the Lincoln Mark VIII provides the greatest airflow. The part number is F8LH 8C607 AA and is available from Houston Performance for $149.00 plus shipping (as of 09/2002). This is a brand new Ford Motorcraft part and has a fan diameter of 18" and a uniquely shaped fan blade. For comparison, the Flex-a-Lite has 16" diameter blades. Of course blade pitch, shape and speed all contribute to air velocity, but the Mark VIII has a 25% increase in surface area.
NOTE: The Lincoln Mark VIII fan will draw continuous currents of 33A@12.0V & 42A@14.4V, and has a starting current in excess of 100A!
I found this part on RockAuto.com
The price has almost doubled since 2002.
Why a Mark VIII Fan?
For severe cooling needs, the electric fan from the Lincoln Mark VIII provides the greatest airflow. The part number is F8LH 8C607 AA and is available from Houston Performance for $149.00 plus shipping (as of 09/2002). This is a brand new Ford Motorcraft part and has a fan diameter of 18" and a uniquely shaped fan blade. For comparison, the Flex-a-Lite has 16" diameter blades. Of course blade pitch, shape and speed all contribute to air velocity, but the Mark VIII has a 25% increase in surface area.
NOTE: The Lincoln Mark VIII fan will draw continuous currents of 33A@12.0V & 42A@14.4V, and has a starting current in excess of 100A!
I found this part on RockAuto.com
The price has almost doubled since 2002.
Last edited by fl_rider; Jul 11, 2006 at 06:51 PM.
Pro
Joined: May 2005
Posts: 745
Likes: 0
From: Miami Florida
done plus questions
installed the fan last nite. cut off the stock mounting tabs and used 4 mr gasket through radiator tie wraps. almost perfect fit great seal and covers entire radiator minus 2.5 inches on each side. i just dont know where to find the connector and still dont know if it is one or two speeds.
Pro
Joined: May 2005
Posts: 745
Likes: 0
From: Miami Florida
done plus questions
installed the fan last nite. cut off the stock mounting tabs and used 4 mr gasket through radiator tie wraps. almost perfect fit great seal and covers entire radiator minus 2.5 inches on each side. i just dont know where to find the connector and still dont know if it is one or two speeds.
Racer
Joined: Feb 2005
Posts: 282
Likes: 0
From: chicago south burbs IL
Originally Posted by rastadr
installed the fan last nite. cut off the stock mounting tabs and used 4 mr gasket through radiator tie wraps. almost perfect fit great seal and covers entire radiator minus 2.5 inches on each side. i just dont know where to find the connector and still dont know if it is one or two speeds.
the push through the rad type?(Like for mouting a trans cooler?)
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 3,503
Likes: 2
From: Raleigh NC
Originally Posted by rastadr
installed the fan last nite. cut off the stock mounting tabs and used 4 mr gasket through radiator tie wraps. almost perfect fit great seal and covers entire radiator minus 2.5 inches on each side. i just dont know where to find the connector and still dont know if it is one or two speeds.
http://cgi.ebay.com/ebaymotors/Mark-...spagenameZWD1V
