To use a clutch fan or not?

Discussion in 'Engine Topic' started by lapedr, Oct 24, 2017.

  1. lapedr

    lapedr Veteran Member Gold Member

    459
    1
    Jan 28, 2003
    Pembroke, GA
    Is it better to use a clutch fan or a non-clutch fan? The engine I am rebuilding is a 385 non-AC with TH350 trans. Would the clutch fan keep the engine cooler? I am using the large heavy duty 4 core radiator with shroud.
     
  2. 70lt1z28

    70lt1z28 Veteran Member Gold Member

    1,177
    131
    Oct 3, 1999
    Beavercreek, Ohio, USA
    A properly working thermostatic clutch fan frees up some horsepower while still cooling the engine. I doubt it will cool better, but should cool at least as good.
     
  3. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

    8,815
    133
    Nov 4, 2004
    Ringgold, GA
    Yes, use the thermostatic controlled clutch unit. It will be more quite and efficient.
     
  4. frank5s

    frank5s Veteran Member

    145
    3
    Sep 6, 2008
    Naperville Il
    Watch this video
    Engine Master cooling fan shootout
    Frank

     
  5. 70-camaro

    70-camaro Veteran Member

    855
    70
    Mar 25, 2010
    marietta ohio
    Here is the fan clutch I bought on eBay. Went from flex fan to this clutch factory 7 blade fan. 5C154B10-4C09-47E1-948B-5CE9D47C45C5.jpeg
     
  6. Zspoiler

    Zspoiler Veteran Member

    I have issue with non clutch fans and electric fans, I tend to more "old school " on a lot of things because they work.
     
  7. lapedr

    lapedr Veteran Member Gold Member

    459
    1
    Jan 28, 2003
    Pembroke, GA
    Thx for all the great info
     
  8. 70lt1z28

    70lt1z28 Veteran Member Gold Member

    1,177
    131
    Oct 3, 1999
    Beavercreek, Ohio, USA
    There's a good reason that the manufacturers put clutch fans on the performance and AC cars back in the day. The basic no-frills cars got fixed fans and the higher cost/high line cars got the clutch fans. They work. A good, thermostatic electric fan works too but you have to have the alternator/charging system to support it properly. Not as easy to initially install either.
     
  9. PalmbchZ28

    PalmbchZ28 Veteran Member Gold Member

    467
    116
    Jan 29, 2017
    West Palm Beach Fl
    After watching the video. I am really surprised how much horsepower a fan can take away.... especially if you're starting with a 190 HP... losing 14 to 30 horsepower hurts.
     
  10. ThomasD.

    ThomasD. Veteran Member Lifetime Gold Member

    214
    3
    Feb 23, 2010
    Fairbanks, Alaska
    This was eye opening. So who has the best set up for an electric fan configuration that won’t over tax a stock alternator? Was planning on a stock type clutch fan but sacrificing 20+ HP isn’t what I want.
     

Share This Page