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328 Condenser Air Flow

Discussion in 'Technical Q&A' started by 328GTB, Nov 15, 2003.

  1. 328GTB

    328GTB Formula Junior
    Silver Subscribed

    Jun 4, 2002
    287
    Texas, USA
    Full Name:
    Carmine
    Which direction is the correct air flow through the condenser? Red or blue?
     
  2. 328GTB

    328GTB Formula Junior
    Silver Subscribed

    Jun 4, 2002
    287
    Texas, USA
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    Carmine
    I'm trying to address the fan direction flow with this question.
     
  3. peajay

    peajay Formula Junior

    Apr 17, 2002
    454
    near Paris, France
    Full Name:
    Paul
    I would say in the red direction, but the direction of rotation of the fan would confirm it, if it rotates clockwise looking from the condensor side, then the red arrow is correct. This all supposes that this sketch is accurate of course.
     
  4. Steve Magnusson

    Steve Magnusson F1 World Champ
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    Jan 11, 2001
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    Steve Magnusson
    It's got to be the blue direction (you wouldn't want to restrict the hot exit side of a radiator with a reducing duct -- well, unless you're desperate;)). (No direct experience for me with the AC ducting on a 328, but) I think you should match the fan's airflow direction to the natural airflow direction caused by coachwork forward motion.
    If the fan blew in the blue direction would this dump the hot air into the front wheel well like a TR?
     
  5. CraigFL

    CraigFL Formula Junior

    Jan 17, 2001
    954
    Panama City, FL
    Full Name:
    Craig
    I would have to say Blue, because it sucks in air thru the RH side of the front grill and dumps it into the wheel well as 91tr thought. It would be unlikely to move in the other direction because it would have to dump air in a high pressure area and thru a restriction.
     
  6. MManzonelli

    MManzonelli Karting

    Nov 4, 2003
    73
    Columbia, IL
    Full Name:
    Mark Manzonelli
    The correct answer is blue. It is a "pull" fan.....I know this as I just replaced one on my 1986 328GTS. The SPAL part number ends in an "A" which means "pull".

    If you do replace this fan, do know that the early model 328 fans are different than the later models.
     
  7. 328GTB

    328GTB Formula Junior
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    Jun 4, 2002
    287
    Texas, USA
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    Carmine
    That makes sense. Do you know what activates the sensor on the condenser? The one at the base of the blue arrow?

    Thanks
     
  8. Steve Magnusson

    Steve Magnusson F1 World Champ
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    Jan 11, 2001
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    Steve Magnusson
    Heat/temperature -- the "sensor" is a thermal SPST switch. Its concave head is held against the straight part of the rigid tube exiting the AC condensor by the U-shaped spring clip. When the hot compressed refrigerant in this tube exceeds a certain temperature (which I can't recall now but it's hot), the switch closes, turning the condensor fan "on", so it's important that the sensor head have good physical contact with the tube.
     

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