What's that Growling Sound? | FerrariChat
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What's that Growling Sound?

Discussion in '348/355' started by troppoveloce, Aug 2, 2010.

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  1. troppoveloce

    troppoveloce Formula Junior

    Jan 25, 2006
    268
    New Hampshire
    Full Name:
    Tom
    #1 troppoveloce, Aug 2, 2010
    When I start my car (348) there's a growling noise that burbles up from the engine compartment. I hear it for the first 20 or 40 seconds, then as though someone threw a switch, it just stops growling. It sounds kind of like an angry tiger growling into a microphone and it changes pitch with the RPMs. Does anyone have a clue what this sound might be?
     
  2. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
    5,966
    Milton, Wash.
    Full Name:
    Jeff B.
    #2 Miltonian, Aug 2, 2010
    Part of the pollution control system in the 348 involves air injection into the exhaust manifolds during the warmup period. If this is what you're hearing, it's perfectly normal. This sound is most obvious if you listen through the air inlets behind the quarter windows.

    See pages C14-15 in the owners handbook if you want information on how the system works.
     
  3. vvassallo

    vvassallo F1 Veteran

    Aug 4, 2006
    8,329
    Palos Verdes
    Full Name:
    Vince V
    #3 vvassallo, Aug 2, 2010
    It's fine relax. It may last longer when the car is colder like in the winter months.
     
  4. Ricambi America

    Ricambi America F1 World Champ
    Sponsor Owner

    Dec 7, 2003
    16,470
    Winston Salem, NC
    #4 Ricambi America, Aug 2, 2010
    Mine usually lasts for about 1/2 mile on a cold day. When it disengages, the odd sound will immediately stop.
     
  5. troppoveloce

    troppoveloce Formula Junior

    Jan 25, 2006
    268
    New Hampshire
    Full Name:
    Tom
    #5 troppoveloce, Aug 2, 2010
    Excellent! Thanks

    I figured it was something normal -and- I figured you guys would know what I was talking about despite my strange description....... :)

    I love this car!!!!!!!!!
     
  6. m13s

    m13s Karting

    Oct 25, 2008
    118
    MA
    Full Name:
    Michael
    #6 m13s, Aug 2, 2010
    Hi Tom,

    Mine does the same thing, kinda like it.
     
  7. FandLcars

    FandLcars F1 Rookie

    Aug 6, 2006
    3,057
    Tempe, Az
    Full Name:
    Rick Schumm
    #7 FandLcars, Aug 2, 2010
    You're lucky. The one on my 348 sounded like a box of rocks, so I removed it!! Best of luck with your new ride! :)
     
  8. troppoveloce

    troppoveloce Formula Junior

    Jan 25, 2006
    268
    New Hampshire
    Full Name:
    Tom
    #8 troppoveloce, Aug 2, 2010
    It does sound pretty cool; I like it too.

    It's just funny how it sounds so mechanical, but it turns on and off more like an electrical toggle switch. It's very noticeable. :)
     
  9. gothspeed

    gothspeed F1 World Champ

    May 26, 2006
    10,244
    U.S.A.
    Full Name:
    goth
    #9 gothspeed, Aug 2, 2010
    It is the 'little man' in the engine compartment shoveling coal into the firebox, to get the boiler to build pressure. This is standard on all 348s and why they are so 'reliable' :)!!!
     

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