Picture of a failed 355 Header Tube | FerrariChat
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Picture of a failed 355 Header Tube

Discussion in 'Technical Q&A' started by Capt, Jun 18, 2004.

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  1. Capt

    Capt Karting

    Nov 9, 2003
    222
    North of Boston
    Full Name:
    Michael
    #1 Capt, Jun 18, 2004
    Last edited by a moderator: Sep 7, 2017
    I just got my headers back from QV London and they included one of the failed tubes, thought you folks would like to see what goes under those heat shields. Keep in mind this tube is exactly how it was found, the crimpled area was done by the heat and not human hands.

    -Michael
    Image Unavailable, Please Login
     
  2. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,977
    MO
    Full Name:
    Omar
    #2 Auraraptor, Jun 18, 2004
    Wow, thanks for sharing that! It looks really bad!
     
  3. jdc1687

    jdc1687 Rookie

    Jun 18, 2004
    1
    #3 jdc1687, Jun 18, 2004
    deathtrap!
     
  4. Smiles

    Smiles F1 World Champ
    Lifetime Rossa Owner

    Nov 20, 2003
    16,674
    Pittsburgh, PA
    Full Name:
    Matt F
    #4 Smiles, Jun 18, 2004
    Michael,

    Can you measure the wall thickness of the tubing? It looks pretty thin, but that may just be the ravages of heat.

    --Matt
     
  5. ze_shark

    ze_shark Formula 3

    Jul 13, 2003
    1,274
    Switzerland (NW)
    #5 ze_shark, Jun 18, 2004
    Traces of corrosion ?
    My car is having both manifolds replaced again in one week, with tales of "before and after" the defect was corrected. Hardly credible for a part delivered in Aug 2003, in emergency ...
     
  6. Lawrence Coppari

    Lawrence Coppari Formula 3

    Apr 29, 2002
    2,192
    Kingsport, TN
    Full Name:
    Lawrence A. Coppari
    #6 Lawrence Coppari, Jun 18, 2004
    Thin is better when it comes to thermal stress cycling as happens with exhaust headers. If it is too thin, corrosion and erosion finish off the header too quickly. If it is too thick, stresses and fatigue end its life prematurely. It is a complicated business. As with everything engineered, there are compromises.
     
  7. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,380
    Houston, Texas
    Full Name:
    Bubba
    #7 BigTex, Jun 18, 2004
    my 308 headers have cracked and burned thru.. better stop quick when it happens.....
     
  8. Capt

    Capt Karting

    Nov 9, 2003
    222
    North of Boston
    Full Name:
    Michael
    #8 Capt, Jun 18, 2004
    I'll have one of my machinist friends measure the tubing as I don't have calipers. Over all the tube didn't look that bad except in the area where it burned through, there as you can see in the photo, it is destroyed.

    -Michael
     
  9. 4re gt4

    4re gt4 Formula 3

    Apr 23, 2002
    2,279
    Roseburg, OR
    Full Name:
    Hans E. Hansen
    #9 4re gt4, Jun 18, 2004
    My mechanic had a pair of 355 headers sitting around his shop that were nothing short of amazing. They were basically melted. Imagine if they were made of plastic, and you put it in the oven.
     

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