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Thread: Zero clearance for puller fan

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  1. #1
    Join Date
    Jan 2003
    Location
    Castries, , Saint Lucia.
    Posts
    122

    Zero clearance for puller fan

    On my current rebuild, I intend to address and fix some nagging issues that have been problematic since my first rebuild several years ago. The first is the lack of clearance between my radiator and the front sway bar. Unlike most of your newer Uniques, my sway bar is mounted to two vertical tabs and there's less than 2 inches of space between the bar and the radiator, making it impossible to mount a decent sized puller fan, let alone a shroud. At first I tried to use the supplied traditional Cobra pushers out front, but it was soon clear that those were good for little more than decoration when the coolant temperature started to rise at idle or in slow traffic.

    I've run a couple of different pusher fan arrangements and the current setup works ok but not to the point that I fully trust it to cool the engine under very hot or slow conditions. The radiator itself is quite efficient and the fans never need to come on when I'm driving over 30mph. For peace of mind on longer drives and heading into town or heavy traffic, I would really like to install a large single puller or a shrouded dual fan setup on the engine side of the rad. This necessitates finding a way to move or tilt the bottom of the radiator forward 2 to 3 inches. I could modify the lower mount easily enough, but there will have to be some cutting of the inside of the front opening. Anyone face a similar issue, and were you able to craft a solution?

    Here's a pic of my predicament




    EDIT: I've even thought of doing away with the front sway bar altogether if it comes down to choosing between dependable cooling and a bit more body roll. A while back one of the sway bar bushing brackets broke completely off and I drove around that way for quite a while before noticing it when working on something else under the hood. In retrospect, the only difference was maybe a bit more rear tire rubbing in the right rear during hard cornering - the roads are very twisty down here and I get to drive fairly rapidly on some of the more remote roads.
    Last edited by Buzz; February 11th, 2018 at 10:44 AM.
    Tropical Buzz

  2. #2
    Join Date
    Sep 2003
    Location
    Roseville, CA, USA.
    Posts
    2,422
    Have you looked at the SPAL fans? I squeezed one in between my sway bar and radiator. Very low profile and does the job for me. When I get in traffic and the engines heats up I flip the fan on and bingo - instant temperature drop. I've had it installed since 2004 and love it!

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    Here are the specs if you are interested - https://www.summitracing.com/parts/spu-ix-30100400/overview/

    Phil

    427 Roadster, #4279436
    470/hp FE by FE Specialties
    3:31 and Toploader (wide ratio)

    Roseville (N.Cal)

  3. #3
    Join Date
    Jan 2003
    Location
    Castries, , Saint Lucia.
    Posts
    122
    I would definitely install one of these if I could, Phil. Not enough space for even the thinnest of fans, unfortunately.
    Tropical Buzz

  4. #4
    Join Date
    Jul 2003
    Location
    Portsmouth, VA, USA.
    Posts
    97
    Buzz;
    I had the same problem; 2.05" between bar and radiator. I slotted the bushing mounts to the rear about an inch which gave me plenty of clearance to mount a Spal 16" fan and a flat full shroud. I also moved the end mounts back so the stand-offs would remain parallel.( I don't know if the last one was necessary but my knuckles were already bruised and bleeding so what the hell!) Another owner posted pictures of his shroud where he built a box big enough to mount the fan behind the bar and this gave him plenty of room. His name escapes me; it might have been Cobra Earl. It seems to me this problem should have been designed out long ago but what do I know?
    Bill
    Bill Stradtner, Portsmouth, VA
    427 S/C #9442
    427W Dart "Replica" Ford Engine

  5. #5
    Join Date
    Jan 2003
    Location
    Castries, , Saint Lucia.
    Posts
    122
    Hello Bill. I wish i had the same type of sway bar bushing mount that your later Uniques have so I could do the same. I apologise for the poor quality of the photo I posted, but you might be able to see that the only way I could move my bar back would be to cut the mounting tabs off and re-weld them a few inches back. I had inquired about doing this a few years ago and I was advised that doing so would result in serious problems with the sway bar geometry.
    Tropical Buzz

  6. #6
    Join Date
    Jan 2003
    Location
    Gadsden, Al , USA.
    Posts
    1,690
    Order a Spal #30100400 from Jegs, about $85.00. Make a spacer about 3/4" thick and shim the top of the radiator forward at the top, it will work.

  7. #7
    Join Date
    Jan 2003
    Location
    Gadsden, Al , USA.
    Posts
    1,690
    We have been using this fan for several years and it does the trick. Do you have the factory vin number for your car?
    Last edited by weaver; February 12th, 2018 at 02:53 PM. Reason: already posted

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