Exhaust Pressure on 308 | FerrariChat

Exhaust Pressure on 308

Discussion in '308/328' started by kemullins63, Mar 31, 2010.

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  1. kemullins63

    kemullins63 Karting

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    I have a question/concern... I have an 81 US version 308 GTSi 2V car, if I put my hand up to the exhaust tips while the car is running, I feel a nice pulsing pressure from the right exhaust, but very little pressure from the left. Shouldn't they feel the same? Also when cold starting, the left side emits a lot of steam until the engine has warmed up. What's going on here? Is it a bad cat? The car runs good.
     
    kemullins63, Mar 31, 2010
    #1
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ Lifetime Rossa

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    If you have the stock muffler = no (the stock muffler is not symmetric inside and shares a common chamber).

    If you have an aftermarket muffler with completely separate, and identical, chambers for each bank = yes.
     
    Last edited: Mar 31, 2010
    Steve Magnusson, Mar 31, 2010
    #2
  3. kemullins63

    kemullins63 Karting

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    My muffler is stock, so it shouldn't concern me the pressure isn't equal?
     
    kemullins63, Mar 31, 2010
    #3
  4. CarreraScott

    CarreraScott Formula Junior

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    My 1980 gtsi is just like that. Just recently had a major done and everything is running great. I wondered that too, but it seems it's normal.
     
    CarreraScott, Mar 31, 2010
    #4
  5. ME308

    ME308 Formula 3

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    No ;)

    (same car here, same symptons with stock mufler...)
     
    ME308, Mar 31, 2010
    #5
  6. Tony K

    Tony K Formula 3

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    Just to be redundant:


    The uneven pressure on the stock muffler is perfectly normal. :)
     
    Tony K, Mar 31, 2010
    #6
  7. mwr4440

    mwr4440 Five Time F1 World Champ Rossa Subscribed

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    Mine (OEM muffler) too. Same- Same.
     
    mwr4440, Apr 1, 2010
    #7
  8. kemullins63

    kemullins63 Karting

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    Ok... thanks guys, it just seemed odd to me :)
     
    kemullins63, Apr 1, 2010
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  9. canadiantifosi

    canadiantifosi Formula Junior

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    X
     
    Last edited: Apr 1, 2011
    canadiantifosi, Apr 1, 2011
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  10. Steve King

    Steve King F1 Rookie

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    For those with Ansa sport mufflers I have seen a cut away of an old muffler and the right side pipe is the 5-8 and the left side is 1-4. You can see in the picture that the 2 sides are separate. I don't know how this is configured in the stock exhaust. FYI
     
    Steve King, Apr 2, 2011
    #10

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