News

F355:Thinking of going for completely straight through exhaust system?

Discussion in 'Technical Q&A' started by 99F355, Jul 22, 2004.

  1. 99F355

    99F355 Karting

    Jul 20, 2004
    97
    LONDON, UK
    Full Name:
    Chip
    Gents,

    I am a newbie to this forum, so any help would be greatly appreciated. I have a early Euro spec F355 (2.7 engine). I also have a Tubi ‘Pipe Only’ exhaust system (similar to a Spa Challenge system).

    I have been told that the cats have blown out, and are now hollow.


    My questions are: What would the effect of replacing the worn cats with test pipes be?

    Would I lose too much back pressure with this i.e. pipe only Tubi and worn cats/test pipes??

    Should leave the cats as they are, or replace them?

    Thanks in advance,

    Roger.
     
  2. To remove this ad click here.

  3. pino

    pino Karting

    Nov 1, 2003
    208
    South Central PA
    Not familiar with your particular exhaust system, so I can't comment on the backpressure, but your hollow cats are now effectively test pipes. Not much difference if you were to actually buy the test pipes now. Bet it sounds pretty sweet!

    I'm not going to touch the "should I replace the worn cats with functioning cats" question.

    Cheers!

    Pino
     
  4. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    20,001
    socal
    Well actually there is a huge difference between testpipes and hollow cats. You see hollow cats still have crap in them that diverts flows and the flow rate changes as it moves and there is resonance moving from a small volume to a large volume room. In my 348 which had hollow cats I put on test pipes and the difference is amazing in the sound. HP differences cannot be felt. I run basically a challenge straight pipe set-up. It is loud.
     
  5. Shamile

    Shamile F1 Veteran

    Dec 31, 2002
    6,563
    Lakeland FL
    Full Name:
    Shamile
    Dear Ferraristi,

    Dear Fatbillybob,

    Better not tell maranelloman ! You should check out the thread on Tubi Test Pipes


    Shamile
     
  6. pino

    pino Karting

    Nov 1, 2003
    208
    South Central PA
     
  7. To remove this ad click here.

  8. davey_jones

    davey_jones Formula Junior

    Sep 28, 2002
    781
    wherever it's sunny
    Full Name:
    Dave

    hehehe - that's my exact set-up (pipes and challenge exhaust) !!!!
    People wonder why I'm laughing all the time. The 348 produces more sound than most people realize. But it hurts soooo good!

    I think the 355 would sound amazing with a challenge exhaust also.. I'd def replace those cats with test pipes though - fwiw

    dave
    indy
     
  9. 99F355

    99F355 Karting

    Jul 20, 2004
    97
    LONDON, UK
    Full Name:
    Chip
    Dave,

    I don't suppose you have any videos or sound clips of your car do you?

    Cheers,
    Roger
     
  10. Joe G.

    Joe G. Formula 3
    BANNED

    Dec 9, 2003
    1,077
    Los Angeles
    Full Name:
    Joe Gazzani
    the car will sound goofy
    not even sound Ferrari like with straight through exhaust

    try it and see

    it'll be loud and people will think you're a ricer
     
  11. GTO84

    GTO84 Formula Junior

    Dec 13, 2003
    562
    Remove your cats and look into them. If the honeycomb is broken or if it's gone, that means it's in your muffler, clogging up the baffles and causing backpressure, and performance loss. Ditch the clogged muffler. Install a Capristo system with their straight pipes.
     
  12. To remove this ad click here.

  13. davey_jones

    davey_jones Formula Junior

    Sep 28, 2002
    781
    wherever it's sunny
    Full Name:
    Dave

    I'm trying to figure out my dvd camera so maybe I can get someting posted.

    dave
     
  14. davey_jones

    davey_jones Formula Junior

    Sep 28, 2002
    781
    wherever it's sunny
    Full Name:
    Dave

    Sorry.. I'll have to totally disagree. I've driven ferraris with stock exhaust and have had 4 diff exhaust setups on my 348:

    tubi with cats
    tubi with pipes
    challenge with cats
    challenge with pipes

    I don't drive very often and I don't putter around either. When I fire it up and blast down the road and through some twisties,
    I'm good for the rest of the week. If you haven't heard it you just wouldn't understand....

    my 2cents

    dave
    indy
     
  15. Joe G.

    Joe G. Formula 3
    BANNED

    Dec 9, 2003
    1,077
    Los Angeles
    Full Name:
    Joe Gazzani
    Dave,

    i here what you're saying

    i thought the original post was that he wanted to go through straight
    no cats
    no tubi
    no nuthin

    just straight from the headers

    maybe i misunderstood what he was asking
     
  16. davey_jones

    davey_jones Formula Junior

    Sep 28, 2002
    781
    wherever it's sunny
    Full Name:
    Dave
    hmmmm - I love a more free flowing exhaust...
    You're right though... might not sound good if straight through.
    I misunderstood your comment. :)

    d
     

Share This Page