Electric fans Mark VII, Ramcharger-Taurus--Explorer bracket kits available also--

[CDW6212R]

Very good, great to hear of the project. Doing it yourself you know how things will work, and fit etc. When you get to it if you need it, I'm sure there is an alternator similar enough to what you have that can be fitted. The new stuff is amazing, I grew up with 55 amp Ford alternators modified with 80 amp windings. Now the same size small aftermarket units can make over 100 amps at idle, and OEM parts are not far off from that. Regards,

[94explorer2x4]

Ok this is an old thread but I am planning to do the markviii fan on my 96 v8. Is their any way to soften the on amp spike with some sort of capacitor or something? On the 2 speed fans is the inital amp spike the same for high and low or does the low speed have a lesser amp spike? If it is the case if you start the fan on the lower speed then using a 2 relay setup when it switches from low to high it will already be moving so it should in theory not spike much higher?
Nate

[Cobraguy]

Have you considered trying to control it with a PWM controller? Painless is the only one I know that has something heavy duty enough to control that big a fan.

[94explorer2x4]

Originally Posted by Cobraguy

Have you considered trying to control it with a PWM controller? Painless is the only one I know that has something heavy duty enough to control that big a fan.

Yes I have, but for the cost I was thinking of a way to buffer the inital spike wich is what is detremental to the electrical system. I do not feel the need to use a pwm controller but would like to buffer the turn on spike.

Thanks, Nathan

[Ozedude]

Okay so I am going to mount a Mark VIII Fan in the original Radiator shroud. This is going to be just a bit too tall for the water pump snout. so I am going to remove the snout on the water pump and then, fingers crossed, I should have the clearance. The controller is a Painless unit, If the fan shroud and water pump fit, this is the next step.

[Ozedude]

Originally Posted by Ozedude

Okay so I am going to mount a Mark VIII Fan in the original Radiator shroud. This is going to be just a bit too tall for the water pump snout. so I am going to remove the snout on the water pump and then, fingers crossed, I should have the clearance. The controller is a Painless unit, If the fan shroud and water pump fit, this is the next step.

Well its now fitted, I had to remove the water pump and cut the snout off, countersink the serpentine belt pulley and fit countersunk Hi Tensile Hex drive bolts and the fan motor was faulty so I stuck a new one in with a flat base, mind you I had to trim about 3 to 4 Millimetres on the three motor posts. The Roller pin holding the fan locating pins dissappeared even though I used the flange glue supplied, I did find another and used JB Weld to lock the pin and the Plate in place. Seems to be working fine now.

[Cobraguy]

I think we would all like some pictures of that install!

[JohnnyCas]

I use a Ford Contour duel fan set up in my Street driven 331 Vorech Blown mustang. In the middle of July with the A/C blowing, stuck in NJ traffic, I have never seen temps higher than 190 degrees. Its a 2 speed fan thats thermostatically controlled via a tap into the thermostat housing.

I would highly sugguest this fan due to how thin it sits, and how much air it moves. I dont know CFM, but it "felt" like more air than a Be Kool duel fan and more than a Black Magic Ultra

[ahodges]

Yep, I also use the contour fans and have never had a problem.

[albi1cnobi1]

Originally Posted by ahodges

Yep, I also use the contour fans and have never had a problem.

X2! I've been using them for 2 yrs now, no problems at all. Never been above 205* in any situation.

[Ozedude]

Originally Posted by Cobraguy

I think we would all like some pictures of that install!

Firstly I must give credit to Aldive (RIP) for the inspiration to try these mods,Thankyou Wise Man.
Okay these are pics of the fan install and the Painless performance Fan control unit






As a bonus, I did see Aldives install of a Mustang 4.6 Lt aftermarket throttle body, however, the problem was the cruise control attachment point is in a different location, so I grabbed another Standard Throttle body from an Explorer and carefully used an engraver tool to grind away the pressed on Accelerator cable Pie section, I modified the aftermarket spring to suit and cruise control works perfect.

[ahodges]

wow. talk about a close fit!! Looks good though, good job!

[ssp.interceptor]

.

[jd4242]

i ended up getting ride of my HHr do to it not keeping up and got a 3.8 supercharged thunderbird fan.this is very similar to the 2 speed Taurus fans but there is one less blade,the blades are thicker,larger blade circumference and a smaller shroud.its also said to pull more cfms than the taurus and just under the mrk8, (4300 cfms).this fan fits like a glove on my rad,it is larger in thickness,about 5" but can be trimmed down to under 4".i run a manual rad so i dont think ill even trim it.here are some pics and ill add one when i go to install it

[Trolling]

Originally Posted by JohnnyCas

I use a Ford Contour duel fan set up in my Street driven 331 Vorech Blown mustang. In the middle of July with the A/C blowing, stuck in NJ traffic, I have never seen temps higher than 190 degrees. Its a 2 speed fan thats thermostatically controlled via a tap into the thermostat housing.

I would highly sugguest this fan due to how thin it sits, and how much air it moves. I dont know CFM, but it "felt" like more air than a Be Kool duel fan and more than a Black Magic Ultra

Originally Posted by ahodges

Yep, I also use the contour fans and have never had a problem.

Originally Posted by albi1cnobi1

X2! I've been using them for 2 yrs now, no problems at all. Never been above 205* in any situation.

do any of you guys have pictures of the fan/install? What controller are you using for it?

[Trolling]

What other fan can we use for our 5.0 v8's?

I've been to the junkyard several times but can never tell what fan would be good enough to cool down a 302 efficiently.

With the controller issue, if people do pull efan's from the junkyard then why not pull/take the oem fan controller too? is it because it would be worthless in our application?

[albi1cnobi1]

Originally Posted by Trolling

do any of you guys have pictures of the fan/install? What controller are you using for it?

I'm still using the DC controller. 2 years and still going strong. I did move the mounting location of the controller from behind the grill to mounting it on the ABS assembly. Much drier and more access-able location.

[Trolling]

thanks for the pics albi1cnobi1.

found some info here http://forums.corvetteforum.com/c3-t...pal-duals.html about markviii fans and their true CFM rating.



could it be that people are just over-hyping the mark viii's CFM and amp draw?

[jd4242]

Originally Posted by Trolling

thanks for the pics albi1cnobi1.

found some info here http://forums.corvetteforum.com/c3-t...pal-duals.html about markviii fans and their true CFM rating.



could it be that people are just over-hyping the mark viii's CFM and amp draw?

No way.you notice they dont tell how they are testing these fans.mark has a vid of the fans mounted and on a amp meter and it definitely pulls more than that.sure he will post soon

[Maniak]

Here ya go..

I know I say "Taurus" on the Vid.. Its actually a Mark VIII.. I just never re-shot the vid.

YouTube Video

Now, when your choosing a breaker (assuming your going with a breaker and not a fuse), keep in mind that they use heat to know when to open. If your in a very hot climate, like we are in southern Az, you will need to oversize your breaker. We tried 80 amp breakers which is well under the max spike of the fan but over time, in the heat of summer the breaker would pop.

We are now using 100 amp breakers on 2 different vehicles and neither has had any issues with the breaker popping. We are using 8 gauge wire to handle the extra load that "might" go through the wire if there is a short.

The fan in that video was behind a 3 core radiator on a 460 motor. We also did a comparison test of a 1 speed mark vIII fan behind a 2 core (with condensor in front) in an f-150 and the readings were about the same.

~Mark