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Technical Fan Shrouds, i need some ideas.

Discussion in 'The Hokey Ass Message Board' started by 26 T Ford RPU, Jul 5, 2016.

  1. Hi team I have been told I need a fan shroud on my T for Cert in NZ.
    Any pics of what you have done would be cool.
    Its only for safety not to aid cooling, that's not an issue.
    Cheers, JW
  2. Ole don
    Joined: Dec 16, 2005
    Posts: 2,915

    Ole don

    Make a box to fit the rear of the radiator, cut a hole one inch larger than the fan centered for fit, make flanges to mount. If its for safety, make it come back just a bit further than the fan. Help from a sheet metal man would be nice, depending on your skill level.
  3. Would they let you run a hood? The '28 Model A had a shroud so maybe you could get some ideas from a vendor catalog.

    Charlie Stephens
  4. Kiwi 4d
    Joined: Sep 16, 2006
    Posts: 2,504

    Kiwi 4d

    Not sure about the shroud deal. But now they want you to run a hood top on a new build!!!
    I know why as we have had it happen numerous times stopped at the lights and a pedestrian will suddenly do a swan dive into the engine to see how hot and sharp it really is .
    Sorry , it really defeats the purpose of building a T bucket by putting a hood on.
    hipster and Skankin' Rat Fink like this.
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  5. george d gabert
    Joined: Nov 12, 2015
    Posts: 17

    george d gabert

    Just cut a strip of sheet metal and extend the radiator shell longer. bolt or rivet to shell. Polished Stainless Steel or painted color of body. That would clean up the rough edge of your current shell. GDG
  6. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 5,546

    Bandit Billy

    Mine has an electric fan shoved in it but you can ignore that part. The shroud was built by Lee at Brassworks. It's made from brass and German silver, brass rivets, ford script stamping is licensed. Just an idea.
    olcurmdgeon likes this.
  7. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 23,444

    Jalopy Joker

    since it is just a safety item, go to or others and search for a cheap universal fan shroud - it is just a chrome 2"-3" wide strip 1/2 circle that installs easily - no use in making it any more complicated than need be.
  8. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 23,444

    Jalopy Joker

    nothing like top quality at top price - but, it sure looks odd with single fan down so low
  9. Dave Mc
    Joined: Mar 8, 2011
    Posts: 1,851

    Dave Mc

    Here is a stock Model A Shroud , they were on Big Trucks and some cars IMG_0711.JPG Cooling has to start at the TOP of the Radiator as the water returns to the TOP,
    Jet96 likes this.
  10. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 5,546

    Bandit Billy

    JJ, Lee claimed it would work perfect down there, so far it has only ran in the garage. It makes sense that heat rises so the fan would be most appropriate in the top of the shroud but Lee has built so many radiators and shrouds that I bowed to his expertise and knowledge of his trade. That has never failed me in the past...LOL
  11. Dave Mc
    Joined: Mar 8, 2011
    Posts: 1,851

    Dave Mc

    There was a Thread dedicated to SHROUDS , but apparently the New & Improved HAMB has deleted older Threads ? I tried to find it on my Feed but it's gone. anyways One guy had made the Ring using a Few inches of a new Garbage can and attached it with brackets , Looked good ,but to be efficient the Air should be drawn through the upper .
    larryj likes this.
  12. Hackerbilt
    Joined: Aug 13, 2001
    Posts: 6,231


    With just a fan you draw generally thru the area directly backed by the fan.
    With a shroud you draw thru the entire core thats enveloped by the shroud.
    Doesn't matter where the fan is...unless its right up tight against the rad cores.
    THEN it will likely draw just thru that area mostly...but its also not the correct way to mount a fan and shroud assembly anyway.
    You do need a little clearance!
    Made a shroud and electric fan combo for my BBC T. Used to cook up a little in traffic or when stopped.
    Not any more! ;)
  13. manyolcars
    Joined: Mar 30, 2001
    Posts: 7,930


    Shroud 3.jpg There was an excellent thread showing how to make one. The HAMB needs an index. Basically get the measurements then lay a cardboard circle the the size of your fan and the correct inches from the base rectangle and drape fabric over and fibreglass then cut the cardboard circle out
    Last edited: Jul 5, 2016
  14. Petejoe
    Joined: Nov 27, 2002
    Posts: 10,172

    from Zoar, Ohio

    Dave Mc likes this.
  15. edcodesign
    Joined: Mar 30, 2007
    Posts: 3,594


    Made mine formed alum. box. angled down 45 deg at the top with a commercial ring bolted on. max engine temp so far 190 deg. IM001153.JPG
  16. Here are some I've clicked and saved off the HAMB. None are mine. The first one is actually two resturant serving trays riveted together.
    ShroudSteamerTray.jpg Shroud.jpg shroud rivited 01.jpg shroud formed.jpg palouse11234S.jpg
    Jet96, Dave Mc and olscrounger like this.
  17. Marty Strode
    Joined: Apr 28, 2011
    Posts: 4,085

    Marty Strode

    Here are a couple of aluminum ones I have built using mechanical fans. IMG_1575.JPG P1010035.JPG P1010070.JPG
  18. 55willys
    Joined: Dec 7, 2012
    Posts: 1,596


    The rule of thumb is to have the fan 2/3rds in and 1/3rd out for optimum cooling. If it is too far in it will recycle the air inside the shroud and cause overheating.
  19. Thanks for all the replies, I don't need it to help with cooling, just a minimal legal requirement type. I can now see why electric fans are used more and more, this may be a quick option or last resort but not my first choice.
    Keep em coming guys, cheers. JW
  20. Mr. Mac
    Joined: May 16, 2005
    Posts: 1,856

    Mr. Mac

    Here's mine simple but it works. t fan shroud 001.JPG
  21. seb fontana
    Joined: Sep 1, 2005
    Posts: 5,935

    seb fontana
    from ct

    Made out of fiberglass.. 51 New Pics 020.jpg
    pat59 likes this.
  22. Jet96
    Joined: Dec 24, 2012
    Posts: 967

    from WY

    Since in your case it's only needed to meet safety req's, does it need to be solid or can it be a wire guard just around the outside edge of the blades?
  23. Dave Mc
    Joined: Mar 8, 2011
    Posts: 1,851

    Dave Mc

    This is the one I made for my 33 , I made Male & Female Dies using 3/4" Plywood and Squeezed a Sheet of # 303 H 14 Aluminum ,using a Porta-Power , then hammered the edges over the plywood and installed an Electric fan , works great ! 33vicShrd1.jpg 33vicShrd2.jpg 33vicShrd4.jpg 33vicShrd6.jpg
    tb33anda3rd likes this.
  24. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 23,444

    Jalopy Joker

  25. Since it is only for safety, can you get the federales off your back with a warning label???

  26. car doctor
    Joined: May 25, 2011
    Posts: 453

    car doctor

    Here is what l made; very simple and does the trick. 2016-07-06 13.01.49.jpg 2016-07-06 13.02.06.jpg
  27. Car Doctor, this is in the area of what I am looking for, thanks and thanks for the other replies.
    I think I may need to see my Cert.guy again and see what will constitute a sufficient shroud then take some ideas from here and make it work. JW
  28. Okay, its been nearly two years and in that time I have rebuilt the car AND made a fan shroud so I thought I should conclude this thread with a report on what I did.
    I used some 2mm thick aluminium sheet (ex work-free!) and shaped and rolled it. Made three mounts, two strap type at the bottom and attached to the Shell/radiator mounts and the top with a long bolt and crush tube to an adapter from the radiator stay mounts. Some black paint and done deal. JW
    AndersF likes this.
  29. wood remover
    Joined: Dec 23, 2012
    Posts: 852

    wood remover

    It is actually illegal to run a car in Ontario without a hood , not that anyone will jump into the motor , but will contain the fluids from splashing onto pedestrians , should you blow a rad hose , transmission or fuel line , contain or slow down a broken fan blade .
    Although not enforced, the law is there !!!
    I am betting your insurance company may enforce it !!!
  30. jimmy six
    Joined: Mar 21, 2006
    Posts: 4,765

    jimmy six

    26T....even tho you did it for protection it still aids in cooling. It's funny that you need to have part of it outside of the lip but for protection it's all inside.

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