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Spraying noise sometimes when giving throttle

Discussion in '360/430' started by erandall38, Jul 31, 2012.

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  1. erandall38

    erandall38 Rookie

    Jun 28, 2012
    34
    Florida
    #1 erandall38, Jul 31, 2012
    The other day when I was driving in a hilly area I noticed that sometimes when I hit the throttle there would be a spraying noise. Similar maybe to one of those computer duster cans being sprayed... does that help you hear the sound?

    One thing I noticed was if I was constant on the throttle and light, there was no noise. But in different bouts of having to throttle a little more on a hill I would hear the spray sound... and it would go on and off as I applied/released pressure. Any ideas?
     
  2. up4speed

    up4speed F1 Rookie
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    Feb 16, 2012
    3,637
    Long Island, NY
    Full Name:
    Chris
    #2 up4speed, Jul 31, 2012
    I'm pretty sure that you are describing the sound of air being gulped into the engine. The intake is the scoop right behind the drivers head. When you give it throttle abruptly, the throttle plates open up to allow air in. What you are hearing is the rush of the air. It's part of the "music"!
     
  3. F430addict

    F430addict F1 Rookie

    Sep 17, 2010
    4,460
    #3 F430addict, Jul 31, 2012
    Yes. Thanks to the resonance chambers.
     
  4. erandall38

    erandall38 Rookie

    Jun 28, 2012
    34
    Florida
    #4 erandall38, Jul 31, 2012
    I was wondering if that was it. I've only had the car for about a month now. I figured I would have heard it before.

    In hindsight the girls window was closed because of her "hair" so I know we weren't hearing it on that side, that could be why.


    So literally the the air intake opens and closes based on throttle? I didn't realize it self monitored, guess I thought it would be open at all times.
     
  5. Mo T

    Mo T Formula Junior

    Nov 26, 2011
    478
    Saudi Arabia
    Full Name:
    Mohammed
    #5 Mo T, Jul 31, 2012
    +1 lol
     
  6. up4speed

    up4speed F1 Rookie
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    Feb 16, 2012
    3,637
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    Chris
    #6 up4speed, Jul 31, 2012
    A simplified explaination:
    The engine is a big air pump. The more air it moves, the more power output. When you press the accelerator, the plates on the intake open up to allow more air in (they are just flaps that open and close). When there is more air, you will also need more fuel to keep the ratio of air and gas proper. More air + more fuel = more power! and more noise output (music).
    If you open your mouth and breathe in sharply, that is the same noise the car makes. It's just that the car has much bigger lungs and the "windpipe" is tuned for a nice sound!
     

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