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Thread: F430 exhaust valve modification

  1. #1
    Join Date
    May 2015
    Location
    Surrey
    Name
    Lee
    Posts
    58

    Default F430 exhaust valve modification

    After testing the golf tee options I realised I don't like having the valve open all of the time but wanted some more noise on tick over. I saw an idea on the Ferrari life forum where a sleeve was installed over the shaft of the valve to keep it from closing at low revs.

    I have been experimenting with this and I tried a 9x35mm spring (11 or 12mm when compressed) over the shaft, followed by the original 10mm nut and a second 10mm nut.

    This enables the exhaust to be open slightly open on tick over and also the valve seems to operate more smoothly with the spring to assist in the function.

    Sounds great!

    If anyone needs any more details let me know.

  2. #2
    Join Date
    Nov 2014
    Posts
    76

    Default

    Nice idea. I can hear a loud click when the calves open. Perhaps this will ease it.

  3. #3
    Join Date
    May 2015
    Location
    Surrey
    Name
    Lee
    Posts
    58

    Default

    Quote Originally Posted by thecook101 View Post
    Nice idea. I can hear a loud click when the calves open. Perhaps this will ease it.
    My loud metallic click/clack when the valves open has gone, now just a change in tone.

    I can post a pic of the mod if it helps.

  4. #4
    Join Date
    Nov 2014
    Posts
    76

    Default

    Pic would be great thanks.

  5. #5
    Join Date
    May 2015
    Location
    Surrey
    Name
    Lee
    Posts
    58

  6. #6
    Join Date
    Nov 2014
    Posts
    76

    Default

    Excellent. Thanks. Might have time to try that this weekend.

  7. #7
    Join Date
    May 2015
    Location
    Surrey
    Name
    Lee
    Posts
    58

    Default

    Quote Originally Posted by thecook101 View Post
    Excellent. Thanks. Might have time to try that this weekend.
    Let me know if you want any more details.

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