Ferrari 412 - Catalytic Converter Instalation | FerrariChat

Ferrari 412 - Catalytic Converter Instalation

Discussion in '365 GT4 2+2/400/412' started by 360modena2003, May 13, 2023.

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  1. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    2,399
    #1 360modena2003, May 13, 2023
    After sorting out the entire fuel injection system, timing chain, and replacing the exhaust valves, I will now install catalytic converters.

    This post will document the entire process.

    The reason for this is that I intend on using my 412, which is actually what they were built for! My plan is to use it as a daily driver, to and from the office, of which a lot involves using underground parking lots.

    The current exhaust is very pungent and leaves my clothes with an awful smell.

    I have order a pair of 2.5 inch Catalytic converters, they are supposed to be for a GMC, Chevrolet Silverado.

    I used a number of online calculators and a pair of 2 inch is more than adequate.

    Comment, suggestions and questions welcomed. Image Unavailable, Please Login Image Unavailable, Please Login

    Sent from my MAR-LX1M using Tapatalk
     
    samsaprunoff likes this.
  2. SouthJersey400i

    SouthJersey400i Formula 3

    Mar 14, 2007
    1,606
    Romulus, NY (Finger Lakes)
    Full Name:
    Ken Battle
    #2 SouthJersey400i, May 13, 2023
    I added two very similar cats bought from Summit Racing. Summit had them listed for 350 HPCorvette, but one per car not two; so they are low back-pressure for our cars. I had same issue of stinky exhaust at low speed/RPM. With the cats exhaust was substantially cleaner once they warm up. I have no Lambda or air pump. I think yours will work out fine.
    Ken
     
  3. SouthJersey400i

    SouthJersey400i Formula 3

    Mar 14, 2007
    1,606
    Romulus, NY (Finger Lakes)
    Full Name:
    Ken Battle
    #3 SouthJersey400i, May 13, 2023
    Be sure you have a good heat shield!!
     
    Steve Magnusson and samsaprunoff like this.
  4. raemin

    raemin Formula 3

    Jan 16, 2007
    1,870
    Lyon (FR)
    Full Name:
    R. Emin
    #4 raemin, May 13, 2023
    I just came through the same issue and finally decided to reduce the cold/hot pressure difference.

    The point is that I am not using the car when it is freezing outside, so there is no point in having the car so rich during startup. i've consequently modified the WUR so as to slightly reduce the pressure under cold circumstances but from memory I am far from the recommended low pressure. This makes the startup far less toxic.
     
  5. raemin

    raemin Formula 3

    Jan 16, 2007
    1,870
    Lyon (FR)
    Full Name:
    R. Emin
    #5 raemin, May 13, 2023
    Just correcting my previous comment I INCREASED the cold control pressure so as to be much closer to the hot pressure.
     
  6. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    2,399
    #6 360modena2003, May 13, 2023
    Thanks. Mine has a heat shield, but only on one side, which side would you place it on?

    Sent from my MAR-LX1M using Tapatalk
     
  7. SouthJersey400i

    SouthJersey400i Formula 3

    Mar 14, 2007
    1,606
    Romulus, NY (Finger Lakes)
    Full Name:
    Ken Battle
    #7 SouthJersey400i, May 15, 2023
    Heat shield is on the top facing the floor "pan" which is fiberglass. Don't park in tall grass!
     
  8. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    2,399
    #8 360modena2003, May 29, 2023
    samsaprunoff likes this.
  9. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    2,399
    #9 360modena2003, May 31, 2023
    Schumi likes this.
  10. Schumi

    Schumi Formula Junior
    Owner Silver Subscribed

    Jun 5, 2002
    834
    Missouri
    Full Name:
    Daren
    #10 Schumi, Jun 1, 2023

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