Uneven Exhaust Flow 1985 308 GTS | FerrariChat
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Uneven Exhaust Flow 1985 308 GTS

Discussion in '308/328' started by Salbones, Apr 29, 2019.

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  1. Salbones

    Salbones Rookie

    Apr 14, 2019
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    Salvatore Celeste
    #1 Salbones, Apr 29, 2019
    I have no doubt this issue has been covered but I am unable to find the answer I need. 1985 308 GTS: Is it normal that the driver's side exhaust to have a substantially weaker flow at idle than the passenger side? That is to say, the passenger side exhaust output is probably twice that of the other side. Other than that, no performance or idle issues. If this is indeed "normal", what is the reason for the disparity?
    Thanks,
    Sal
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    Jan 11, 2001
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    Steve Magnusson
    #2 Steve Magnusson, Apr 29, 2019
    it's normal for a stock F muffler -- the internal design is asymmetric.
     
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  3. Salbones

    Salbones Rookie

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    #3 Salbones, Apr 29, 2019
    Thank you, I appreciate the quick response!
     
  4. Jdubbya

    Jdubbya The $10 Trillion Man
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    Dec 28, 2003
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    #4 Jdubbya, Apr 30, 2019
    But would it even out if you used the choke lever or flipped the emergency flasher switch a few times? ;)

    Sorry, couldn't resist. :D
     
  5. nerofer

    nerofer F1 World Champ

    Mar 26, 2011
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    #5 nerofer, Apr 30, 2019
    This is the "innards" of a stock "marmitte" from an "euro" 328, that is without catalysator: you can see that the tubes are assymetric; note that the design of the catalysed exhaust is not the same, even if the outcome is identical.

    Rgds
    Image Unavailable, Please Login
     
  6. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #6 Rifledriver, Apr 30, 2019
    Turn the battery off and see what happens.
     
  7. millsj

    millsj Karting

    Oct 17, 2011
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    #7 millsj, Apr 30, 2019
    I sure am glad I ran across this thread. I have had the same observation with my exhaust and wondered if it is normal. One less thing to worry about. :)
     
  8. damntall

    damntall Karting

    Jun 15, 2018
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    Bryan Wright
    #8 damntall, May 1, 2019
    I have an ANSA exhaust on my car, so I'm not sure whether this would apply for you... but I had this same problem.

    Turns out it was misfiring on 2 cylinders in the front bank. Got that sorted with new plugs, wires, and resistors and it's equal exhaust pressure all round now.
     
  9. Salbones

    Salbones Rookie

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    #9 Salbones, May 6, 2019
    Thanks for taking the time to attach the photo. I get it now, Thanks again!
     

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