Mark VIII Cooling Fan Question

[67Dylan]

I've owned MANY fox bodies and this is my first venture into the gen 1 stang. I am very happy so far, but I have a question regarding the Mark VIII fan; I used it in a few fox bodies w/stroker motors w/much compression producing a lot of heat. They work great to keep the car very cool in the AZ heat. Question is why don't I see anyone in the gen 1 using the fan? I've done search's on the board and see ppl talking about it, but nobody actually using one.

I have a stroked 351 going into the 65, I am cutting some of the fan area out for more 'exposure' and going w/a Ron Davis, slightly larger than stock, radiator. I want to run a Mark VIII fan, due to its ability to suck in air at an amazing rate. Anyone use one? If so how much fabrication? FYI I am asking as this is a couple of months down the road, but not better time then the present to plan

 

[68FBJJZ109]

I to havent seen anyone with classic's running them, but i plan on it. My friends with fox bodies do and they do a great job keeping the motor cool. If i get to that point before you I'll let you know how it turns out.

 

[LUCAFU1]

Hey whats up Dylan.
I have been looking into using a Viper fan since it pulls about the same air as a mark fan. The only thing thats stopping me is size. I plan on cutting up my radiator support to fit a fox radiator but I need space on the side for tubing. The viper fan is about the same size as the mark but not as deep. its pretty close though. Best price I have found is on makeitmopar.com
I need to find the p/n agian if your interested. I have been looking at ron davis' site and he has sells radiators with fans and tanks. he even has a cross flow for the first gen that i really want. i dont want to email and ask for the price because im sure i wont like it. but they sure are sweet. i have a brand new black magic fan here but im sure that wont be enough here in AZ.

 

[rbohm]

one reason the mark Vlll fan is rarely used is the current draw. it draws 33 amps in contiunous use, and 100 amps on start up . you need to upgrade to a high amp alternator to maintain battery charge if you use this fan. you also need to use a minimum 75 amp relay to power the fan, or get a delta controls fan controller that turns the fan on slowly, and regulates the fan speed to maintain proper engine temp.

 

[HHStang]

I was told you need a 130 amp alt minimum to run the Mark VII fan and it is popular with the 5.0 guys. Check out the Dodge Intrepid fan, it is equally as popular, a lower profile and much lower amp draw. It was sold for years as the "Ramcharger" fan by a defunct company named Ramcharger. I knew who the real manufacturer of the fan was, but can't remember.

 

[jbuening]

I looked into the late model Mopar fans (Intrepid/LHS/etc) but the mounting holes are on the ends. I'm running a crossflow radiator and the mounting holes end up on the tanks. I have now found another dual fan setup that Nissan Maxima/Ultima cars use and the mounting holes are on the top. Can't find any cfm or amperage ratings on them though. Isn't the MarkVII fans similare to the Taurus fans?

 

[HHStang]

I just tigged a couple mounting tabs on the tanks. The Mark fan is very similar to the Taurus.

 

[67Dylan]

For max cooling nothing beats the Mark VIII. Sure it draws ~100A at start up, runs a solid 30A while running, but it's CFM is hard to beat. The Taurus fan shares the same motor, but has a much different blade; the MVIII blade allows the increased air flow.
The fans are popular here in the AZ heat; 110+ during the summer time. My last 3 high compression stroked fox bodies all had them in it and helped keep the cars 180*-190*. All other fans mentioned are either marginal, at best, or can't move enough air. In other places they might work tho. I'm really not interested in using another fan as I have a 378, 11:1, big cam motor going in my 65 and need max air flow. I'm gonna have to do some measuring, cutting, and more measuring. I'm fairly sure it will fit; I'll take pics and measurements as I go for others.

Luis, the RD rads you saw are in excess of 600$. I talked to them last week and almost crap my pants when I was told the price. I'm going w/the standard fox body fan. I have a brass 3-core here to mock up. Waiting on an extra Mark VIII from Paul #1. Good thing I have the MIG.