F430 reduced sound required post AP Racing manifolds? | FerrariChat

F430 reduced sound required post AP Racing manifolds?

Discussion in '360/430' started by dvb247, Jul 29, 2015.

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  1. dvb247

    dvb247 Karting

    Nov 4, 2012
    235
    #1 dvb247, Jul 29, 2015
    Hi there,
    Recently changed my stock manifolds for AP racing, now getting a static db reading of 103/107 db at 5k revs?
    Cheers!
     
  2. dvb247

    dvb247 Karting

    Nov 4, 2012
    235
    #2 dvb247, Jul 30, 2015
    Any ideas?
     
  3. Russell996

    Russell996 Formula 3

    Sep 24, 2010
    2,263
    New Forest UK
    Full Name:
    Russell
    #3 Russell996, Jul 30, 2015
    3 suggestions (already posted elsewhere in response):
    1. Check everything is working correctly, valves not stuck open (not applicable for the noise test but I think you said it was loud all the time?) and and muffler not damaged. Your car sounds unusually loud from your description.
    2. Track day muffler - expensive option, will meet noise limits although always quiet.
    3. Valve controller that for noise tests will keep the valves shut - cheapest option and allows noise when wanted. http://www.ferrarichat.com/forum/143758150-post9.html
     
  4. Perkins

    Perkins Formula Junior

    Dec 22, 2013
    702
    Sacramento
    Full Name:
    Rick
    #4 Perkins, Jul 30, 2015
    I installed the AP manifolds as well. With the valves open in a tunnel, my ears hurt. It seems louder than a jet engine at full throttle.
     
  5. dvb247

    dvb247 Karting

    Nov 4, 2012
    235
    #5 dvb247, Jul 30, 2015
    1. Check
    2. Only an option for Scud/Challenge
    3. An option but not the answer really
    Thank Russell, need all the advise I can get, think it's going to be a change of back box (or mufler) and adding in a precat possibly????
     
  6. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    17,940
    USA
    #6 f355spider, Jul 30, 2015
    Do you still have stock catalysts and muffler?
     
  7. dvb247

    dvb247 Karting

    Nov 4, 2012
    235
    #7 dvb247, Jul 30, 2015
    Yep, did the same last week through the Manchester airport tunnels, my son was uncontrollably laughing as a passenger, simply could not believe the noise, to say it's obscene is understating the fact by a factor of 10 !!!!!

     
  8. dvb247

    dvb247 Karting

    Nov 4, 2012
    235
    #8 dvb247, Jul 30, 2015
    Yes

     
  9. gandalfthegray.

    gandalfthegray. Formula Junior

    Jul 18, 2006
    692
    Pinewood, MN
    Full Name:
    Steve
    #9 gandalfthegray., Jul 30, 2015
    Uncontrollable laughter from the passenger is never a good sign. :)

    I appreciate you guys commenting on the negatives of the aftermarket headers as well. It seems like everyone's quick to tell the noobies to change headers but I wonder how many actually have themselves?

    I've been going back and forth on this as well. I'd like to have the higher pitch but don't want to be called into the cops everytime I drive the car. Been there, done that with the Gallardo.
     
  10. RonnieRenaldi

    RonnieRenaldi F1 Rookie

    Aug 16, 2004
    2,685
    #10 RonnieRenaldi, Jul 30, 2015
    Does AP headers have the same design as Fabspeed?
     
  11. dvb247

    dvb247 Karting

    Nov 4, 2012
    235
    #11 dvb247, Jul 30, 2015
    Last edited by a moderator: Sep 7, 2017
  12. bocaf430

    bocaf430 Formula 3

    Jun 10, 2014
    1,361
    LI, boca raton
    #12 bocaf430, Jul 30, 2015
    I thought I read on here a while back that AP and Fabspeed are both made in china at the same place...
     
  13. Russell996

    Russell996 Formula 3

    Sep 24, 2010
    2,263
    New Forest UK
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    Russell
    #13 Russell996, Jul 30, 2015
  14. Perkins

    Perkins Formula Junior

    Dec 22, 2013
    702
    Sacramento
    Full Name:
    Rick
    #14 Perkins, Jul 30, 2015
    I understand that they are literally the same header. Made by the same manufacture in Asia. There have been a few big threads on this in the past.
     
  15. Perkins

    Perkins Formula Junior

    Dec 22, 2013
    702
    Sacramento
    Full Name:
    Rick
    #15 Perkins, Jul 30, 2015
    I'm a young guy and I love loud exhausts. I have the stock muffler. Dare I say it might be too loud at full throttle?

    There are literally no other downsides. I've thrown one CEL so far but I just reset it with my handheld scanner and it has not come back.

    The sound at idle is amazing. It absolutely screams at redline. And it eliminate the possibility of the infamous cat/header problem destroying your motor. It actually happens to guys, so I decided it was cheap insurance.
     
  16. gothspeed

    gothspeed F1 World Champ

    May 26, 2006
    10,244
    U.S.A.
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    goth
    #16 gothspeed, Jul 30, 2015
    +1 ....... If you have aftermarket ....... on eshould know that making a 'high flow' performance exhaust quite requires tuning ..... one cannot simply grab silnecers off the shelf and expect good sound attenuation ... unfortunately that is what many builders do ... :eek:
    There has to be some wave cancelation built into the design .... check out the 355 exhaust in my signature for an example of a quiet exhaust while cruising and screaming F1 at WOT ...... this 'Dr. Jeckle and Mr. Hyde' is exactly what the owner specified ...... ;)
     
  17. SCKOMS

    SCKOMS F1 Rookie
    Silver Subscribed

    Oct 21, 2011
    3,849
    Lake County, IL
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    Spiro
    #17 SCKOMS, Jul 31, 2015
    I have AP headers and a Tubi exhaust. Ridiculously loud!
     
  18. dvb247

    dvb247 Karting

    Nov 4, 2012
    235
    #18 dvb247, Aug 1, 2015
    Last edited by a moderator: Sep 7, 2017
    Professional db sound level meter only £10 on eBay, if you notice me hanging around your tailpipes in the next few weeks don't be alarmed lol
    Image Unavailable, Please Login
     
  19. dvb247

    dvb247 Karting

    Nov 4, 2012
    235
    #19 dvb247, Aug 1, 2015
    I ruled this mod by Capristo out but from all I have read since I think it could be the answer, such a shame the youtube clip doesn't have a drive by version so we can gauge the sound level difference on the road
    https://www.youtube.com/watch?v=Phf2z_ZnbNw
     
  20. Russell996

    Russell996 Formula 3

    Sep 24, 2010
    2,263
    New Forest UK
    Full Name:
    Russell
    #20 Russell996, Aug 1, 2015
    Capristo valve control won't help your problem of being too loud as it is designed to open the valves when you want BUT it always allows the car to open the valves when it wants. Bisel's valve controller has the additional option to keep valves closed. (I have the Capristo on my car and have only read details of Bisel's controller)
     

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