My Capristo sound 1 is louder than my sound 3, why? | FerrariChat
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My Capristo sound 1 is louder than my sound 3, why?

Discussion in '348/355' started by betterredthandead, May 20, 2025 at 5:00 PM.

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  1. betterredthandead

    betterredthandead Rookie

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    #1 betterredthandead, May 20, 2025 at 5:00 PM
    So I had a New Capristo Sound 3 put on my 1996 355 spider, but it was pretty loud at lower RPM's. Was setting off car alarms in my apartment parking garage. So I purchased a new sound 1 thinking that would solve my problem but it's actually just as loud if not louder at low RPM's. So are the sound levels just some kind of gimmick or what?
    Exact setup:
    Tubi Headers
    Fabspeed Sport Cats
    Capristo sound 1
    Capristo bypass valve

    I also have a 1995 GTS with
    Fabspeed headers
    Fabspeed Cat delete
    Capristo 3

    Which is perfect at lower RPM's, noticeably quieter than the spider.

    Is there anyway to make the Spider quieter without having to shell out another 5k+ just to test another exhaust?
    Thanks
     
  2. radback

    radback Formula Junior
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    #2 radback, May 21, 2025 at 12:50 AM
    Can you measure the dB at idle from 1 meter behind the exhaust tip with an app like dB meter or decibelX?
     
  3. SteveRielly

    SteveRielly Rookie

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    #3 SteveRielly, May 21, 2025 at 1:09 AM
    Does the spider have an exhaust fully open at all times and the GTS has closed valves at idle/low RPM?
     
  4. Qavion

    Qavion F1 World Champ
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    #4 Qavion, May 21, 2025 at 3:02 AM
    Are you sure the bypass valve is closing? Installation issue? Loss of vacuum?
     
  5. ShineKen

    ShineKen F1 World Champ
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    #5 ShineKen, May 21, 2025 at 8:37 AM
  6. ShineKen

    ShineKen F1 World Champ
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    #6 ShineKen, May 21, 2025 at 8:43 AM
    Capristo Sound 3 and Sound 1 have the same sound level when bypass is closed. Both are their quietest versions (bypass closed).

    The difference should be when the bypass opens. The Sound 1 is probably quieter than the Sound 3. Most prefer loud when bypass opens.
     
  7. ShineKen

    ShineKen F1 World Champ
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    #7 ShineKen, May 21, 2025 at 8:46 AM
    Your 2.7 95 car is quieter simply because Capristos are quieter on 2.7 setups when bypass closed. It will scream louder than your 5.2 when bypass opens.
     
  8. blox79

    blox79 Karting

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    #8 blox79, May 21, 2025 at 8:56 AM
    It's exactly the other way arround. An Capristo 1-3 eyhaust has with a closed valve sound level 1 (a bit louder then stock) and level 3 (loud) when fully open. The capristo level 3 has from closed to open valve the same loud sound.

    Cheers mike
     
  9. ShineKen

    ShineKen F1 World Champ
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    #9 ShineKen, May 21, 2025 at 8:59 AM

    Lol.
     
  10. betterredthandead

    betterredthandead Rookie

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    #10 betterredthandead, May 21, 2025 at 9:07 AM
    Talked to the shop that did the install. They are saying it was and should be definitely quieter. They are guessing something is wrong with the valve or a solenoid not working properly. I guess whoever threw it on there thought everything was working fine when I picked up the car but it wasn't.
     
  11. ShineKen

    ShineKen F1 World Champ
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    #11 ShineKen, May 21, 2025 at 9:08 AM
    “The capristo level 3 has from closed to open valve the same loud sound.”

    I supposed there’s no need to buy a valve controller then. Lol.
     
  12. ShineKen

    ShineKen F1 World Champ
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    #12 ShineKen, May 21, 2025 at 9:14 AM

    Capristo bypass’ supposedly fails open, so there’s that. Get that sorted and get back to us. However, I doubt that’s the issue.
     
  13. ShineKen

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    #13 ShineKen, May 21, 2025 at 9:18 AM
  14. ShineKen

    ShineKen F1 World Champ
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    #14 ShineKen, May 21, 2025 at 9:28 AM
    A straight muffler swap requires no need to mess with the bypass valve aside from attaching the muffler to it. In short, if you had a bypass valve issue, it was most likely there before you took it to the shop, therefore, no changes.


    Are they the ones who sold you on the Capristo 1? Or is this simply a muffler you purchased on your own and had them install?
     
  15. betterredthandead

    betterredthandead Rookie

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    #15 betterredthandead, May 21, 2025 at 9:53 AM
    The Capristo came new in box straight from capristo. The box was marked "Sound 1". The Install was done by a very reputable Ferrari shop in Fort Lauderdale, however they have made mistakes in the past. They claimed it was a lot quieter than the sound 3 they took off, however the car was in their shop for about 2 months while they were working on other things. So possibly something happened in that time.
     
  16. ShineKen

    ShineKen F1 World Champ
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    #16 ShineKen, May 21, 2025 at 10:07 AM

    If they “sold” you on this muffler, they have no choice but to tell you it is alot quieter (bypass closed) because they would look foolish if they didn’t selling you a muffler that did not meet your objectives.


    Most sellers are confused between the differences. Your experience confirms what I’ve known to be the true differences.


    It’ll be fun to watch them try to figure it out though :).



    On a side note, you mentioned Capristo bypass valve on your 5.2, but not on your 2.7?

    Capristo bypass fails open by design (natural state is open). On start up, it is open, so it’s louder than a stock valve as you turn the key. Then the valve then begins to close and quiets down. If it doesn’t close, then something is wrong, but it should be very noticeably loud… not somewhat loud.
     
  17. MK355

    MK355 Karting
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    #17 MK355, May 23, 2025 at 7:36 AM
    I have Tubi headers and Capristo Sound 2 on my car.

    During my engine out service this year I had them install the Capristo bypass valve. When I picked my car up it was completely silent and the valve never opened. I called them to tell them the issue and their first thought was the solenoid was bad. When I brought the car back in they quickly realized the Capristo bypass switches the vacuum lines from OEM. They made the switch of the lines and it works perfectly again.

    I know this doesn't help the OP but "failed solenoid" was mentioned so thought I'd share
     

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