F430 exhaust valve question | FerrariChat

F430 exhaust valve question

Discussion in '360/430' started by sleepinglh, May 13, 2017.

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  1. sleepinglh

    sleepinglh Karting

    Jul 30, 2015
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    Sydney Australia
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    Q
    #1 sleepinglh, May 13, 2017
    Last edited by a moderator: Sep 7, 2017
    Hi all, I got this F430 recently and installed manual valves to my f430 and it definitely keeps my valves open BUT have you guys noticed the car is loudest when cold started and goes quiet after a minute like a valve just flipped.... its the same with booth hoses pulled off.

    Why does it do that? Are there other valves in the intake or something? Or is it simply cold start enrichment pumping extra fuel creating more exhaust volume? It's a big drop in sound.
    I'd love to get the cold start noise all the time got that deep brap brap sound like a ported rotary engine.
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  2. mkzhang

    mkzhang Formula Junior

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    #2 mkzhang, May 13, 2017
    On cold start the car will run at a higher RPM to heat up the pre cats for about 30 secs or so and go down to a regular idle. All cars do this. It is just more apparent on a very loud car.

    Congrats on the new car!
     
  3. rizzo308

    rizzo308 F1 Rookie
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    riggio
    #3 rizzo308, May 13, 2017
    Wow!! nice looking car. What wheels are that car?
     
  4. sleepinglh

    sleepinglh Karting

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    #4 sleepinglh, May 13, 2017
    Hmmm the rpm is only a few hundred higher I can't see to make it sound so loud with my foot pushing it to 1500rpm.
    Thanks it's f430 with scuderia body kit and those wheels are....kinda like scuderia style but I bet the original owner bought fake look alikes
     
  5. bisel

    bisel Formula 3
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    #5 bisel, May 14, 2017
    Not sure about your car, but on 360's after 2000 in the North American market, there is an air injection system that come on when cold start. Air is injected into the exhaust header. This is for cold start emission to help burn off the unburt fuel during cold starts. This makes a lot of noise for about 30 seconds or so and as soon as the air pump turns off ... instantly quiets down. I believe in Europe, there is no air injection on the 360.

    Steve
     
  6. sleepinglh

    sleepinglh Karting

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    #6 sleepinglh, May 14, 2017
    I see..... thanks I'll look closer and see if I have that on my headers
     
  7. dapper

    dapper Formula Junior

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    #7 dapper, May 14, 2017
    looks a bit more than just a bodykit, with those pipes up there like a real scud.
     
  8. Fabspeed Motorsport

    Fabspeed Motorsport F1 Rookie
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    #8 Fabspeed Motorsport, May 15, 2017
    Sounds like the open/closed loop coding within the ECU to warm the cats up quicker. Car looks incredible, I am sure you're enjoying her so far. Let me know if/when you're looking to get some more performance and sound out of her!
     
  9. sleepinglh

    sleepinglh Karting

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    #9 sleepinglh, May 16, 2017
    I'll need new headers in the future, currently planning a simple 5psi turbo setup with water to air intercooler and flex fuel capability.
    It's gonna be a custom diy project as the underground racing kit cost more than my kidney could sell for.
     
  10. Fabspeed Motorsport

    Fabspeed Motorsport F1 Rookie
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    #10 Fabspeed Motorsport, May 16, 2017
    Very cool - keep us posted on that! Let me know if I can help at all, I have done a lot of one-off builds. What grade ethanol do you have access to?
     

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