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Portofino exhaust upgrade

Discussion in 'California/Portofino/Roma' started by fanboy01, Sep 14, 2019.

  1. fanboy01

    fanboy01 Rookie

    Jul 15, 2011
    13
    3 month ago i picked my new Portofino and i'm very much satisfied with it apart from the exhaust note. So i've been searching for upgrade of the exhaust and end up getting Kline downpipes with 200 cell cat, Kline X pipe and Capristo rear section. I have a 991.2 Turbo S with full set of Kline Inconel exhaust which sounds way better than stock makes me a fan of Kline. It sounds even better than stock Portofino.

    This Tuesday i got all the parts fitted and i was surprised on how loud the car sounded even on idle with flaps closed. The exhaust note was much more high pitched and probably 2 times louder than stock. But there was a critical problem. It droned like crazy at 2000-3000 rpm made me feel the car is shattering.

    So i decided to change the Capristo muffler to stock. The result comes out surprisingly well: Exhaust note not as good as Capristo muffler but still much better than stock; very quiet on low rpm, loud enough on high rpm; almost no drone at all on full rpm range.

    The car is much more exciting to drive now and still a good daily driver. I may try the Kline downpipes + stock H pipes + Capristo muffer combination next time and will post feedback.
     
    Caeruleus11 and uhn2000 like this.
  2. wrs

    wrs F1 Rookie
    Rossa Subscribed Owner

    Jul 11, 2015
    4,314
    Austin, Texas
    Full Name:
    William
    I had Kline headers, FVD sport exhaust and cat delete on my 991 tts. That was a loud setup, the car even vibrated the ground. I think that was too much and I traded the car that way for my new Cali T HS back in March 2017. The Cali T HS note was really good, it was higher pitched than the Portofino with a fair amount of popping and burbling on overrun. I know the Portofino sounds better than that but it has a lower pitch. I liked the sound on my Cali T HS enough not to mess with it.

    On my 488 I have put on the Tubi straight pipe exhaust which basically just eliminates the sound box. Have you had any issues with CEL due to the 200 cell cats or issues with O2 sensors? The good thing about the Tubi is that it uses all the same stock components for the valves as the OEM so the ECU can't tell any difference.
     
  3. fanboy01

    fanboy01 Rookie

    Jul 15, 2011
    13
    No CEL or any issues now.
    The stock valves' control is the best. Capristo's isn't as smart but it can open the flaps all the time using remote.
     
    uhn2000 and wrs like this.
  4. KarlA69

    KarlA69 Formula Junior

    Oct 9, 2017
    361
    Full Name:
    Karl
    Caeruleus11 likes this.
  5. rocketman

    rocketman Formula 3
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    Oct 1, 2009
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  6. KarlA69

    KarlA69 Formula Junior

    Oct 9, 2017
    361
    Full Name:
    Karl
    Indeed it is. It's my car so I'm sure! :)
     
  7. Il Co-Pilota

    Il Co-Pilota Formula 3

    May 29, 2019
    1,829
    Copenhagen
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    A.B
    Have you considered trying stock cats but x pipe and capristo mufflers?
     
  8. fanboy01

    fanboy01 Rookie

    Jul 15, 2011
    13
    I may try this setup later. The reason i prefer stock mufflers is the electric controlled valve flaps are far more sensitive than Capristo's vacuum valve. But the ability to keep the flaps open all the time with Capristo's remote is really charming though.
     
    Il Co-Pilota likes this.
  9. fanboy01

    fanboy01 Rookie

    Jul 15, 2011
    13
    Very nicely write up. I'm sure this article will help a lot for people who want to mod their exhaust
     
  10. Tubi Sales

    Tubi Sales Karting
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    Jul 5, 2019
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  11. Redneck Slim

    Redneck Slim Formula Junior
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    Mar 10, 2011
    687
    Palo Alto,CA,USA
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    Walt Kimball
    I installed a Capristo E2E controller ($650) and I like it. No more annoying on/off exhaust sound. I have Tubi straight-pipe mufflers ($3920) and a Kline x-pipe ($2300) coming. The Tubi valves use the stock control system,so the E2E should continue to work with these new exhaust parts.
     
  12. Sean@TAG

    Sean@TAG Karting
    Sponsor

    Feb 25, 2015
    91
    We installed the Capristo system as well as the remote kit for a local client of ours recently, and he absolutely loves it!
     
  13. Redneck Slim

    Redneck Slim Formula Junior
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    Mar 10, 2011
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    Walt Kimball
    The new exhaust parts turned on the check-engine light and the codes showed lean on both banks. My service advisor said to drive it and hope for a computer relearn as it accepts the lower back pressure. I left the mufflers on stock to not reduce back pressure as much and after almost 500 miles everything cleared up. Then I switched to open and the lights came back. I will continue to drive it and hope for more relearn. The exhaust sounds great on either setting. Stock sounds better than open did with the stock parts.
     
  14. Tubi Sales

    Tubi Sales Karting
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    Hey Walt,

    That's quite interesting. Did you get the actual code by chance?
     
  15. Redneck Slim

    Redneck Slim Formula Junior
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    Mar 10, 2011
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    Walt Kimball
    No. I was there but I didn't ask for the numbers. The tech just told me that both banks showed a bit lean. To make things a bit more complex,that condition first disables the start/stop system and later turns on the check-engine light but without dire warnings (like I got when I unplugged the electrical connectors from the stock mufflers).
     
  16. Tubi Sales

    Tubi Sales Karting
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    I'm going to assume that the electrical connectors are plugged back in after installing the exhaust?
    I'm speaking to the gents over at Tubi Italy to see what might be the cause so if it does come back on please get the Code so I can help narrow down the issue.
     
  17. Redneck Slim

    Redneck Slim Formula Junior
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    Mar 10, 2011
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    Palo Alto,CA,USA
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    Walt Kimball
    I installed a Capristo E2E controller a while back that I used with the stock mufflers,and that is used now with the Tubis. A freer-flowing exhaust tends to lean the mixture,so it makes sense to me that the ECU needs to adapt-relearn-to get the mixture back to stock.
     
  18. Tubi Sales

    Tubi Sales Karting
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    Keep me posted!
     
  19. Redneck Slim

    Redneck Slim Formula Junior
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    Mar 10, 2011
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    Palo Alto,CA,USA
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    Walt Kimball
    After 1300 miles the check-engine light went off and the accompanying electronic craziness ended. 350 miles with no problems,then some WOT fun got things started again. 100 miles later,everything ok. This is with the exhaust on the quieter setting. BMC air filters are coming and the ecu still has to learn to accept the louder setting.

    Bottom line: The ecu relearns,albeit slowly. Patience is required.
     
    Tubi Sales likes this.
  20. Tubi Sales

    Tubi Sales Karting
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    Jul 5, 2019
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    Thank you for that in-depth feedback. I'm glad that it was just a scare and everything worked out.
     
  21. fanboy01

    fanboy01 Rookie

    Jul 15, 2011
    13
    So your setup is stock cat + Kline x-pipe + Tubi mufflers now? How do you compare the sound with full stock setting? I'm thinking of the same setup as you coz the sport cats i'm currently using turn on the CEL which is rly annoying.
     
  22. Redneck Slim

    Redneck Slim Formula Junior
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    Mar 10, 2011
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    Palo Alto,CA,USA
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    Walt Kimball
    Taka look at my post # 13.
     
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