355 - Ferrari 355 Subframe weight? Aluminum construction? | FerrariChat

355 Ferrari 355 Subframe weight? Aluminum construction?

Discussion in '348/355' started by ExcelsiorZ, Jul 20, 2020.

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  1. ExcelsiorZ

    ExcelsiorZ Formula 3
    BANNED

    Nov 7, 2003
    1,267
    Beverly Hills
    Was wondering if anyone has ever weighed the F355 rear subframe?

    Last time I saw one bare it seemed a bit heavy to me. Has anyone looked into constructing one of these out of aluminum?
     
  2. fboutlaw

    fboutlaw Formula Junior

    Dec 3, 2014
    260
    Woodside, CA
    I personally wouldn't attempt this for 2 reasons. (Do have an engineering degree, but it's been years since applying it in this way)

    1. Aluminum's yield strength is finite wheras steel goes through work hardening. Meaning once aluminum starts to fail, it's gone. With steel it actually gives you some margin at yield, where if it's a temporary load, it may be ok and not yield.
    2. The rear subframe sees a lot of vibration from the motor and road. If Ferrari did their job correctly, they would have tuned weight of parts to limit natural harmonics. The lighter you go, the higher the frequencies that will resonate through the subframe.

    And 3, using the engine subframe as a jacking point to get to quick jobs in the rear, I don't know that I'd trust aluminum not engineered in CAD from the factory.
     
  3. SoCal1

    SoCal1 F1 Veteran
    Owner Silver Subscribed

    Jun 14, 2011
    8,630
    SoCal LA/OC/New Mexico
    Full Name:
    Tim Dee
    The subframe very lightweight 105 pounds
    I weighed it a few months back
     
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  4. FourthAlfa

    FourthAlfa Karting
    Rossa Subscribed

    May 15, 2015
    184
    Paris, France
    Full Name:
    Andrew Love
    Agree, I’ve been lugging mine around (to powder coater and back), I would not have described it is heavy.
     
  5. INTMD8

    INTMD8 F1 Veteran
    Owner Silver Subscribed

    Jun 10, 2007
    6,766
    Lake Villa IL
    I was thinking of doing an alloy one, then changed to the idea of chromoly. Sounds like it may not be worth doing.
     
  6. ExcelsiorZ

    ExcelsiorZ Formula 3
    BANNED

    Nov 7, 2003
    1,267
    Beverly Hills
    Thank you. Additional food for thought!
     

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