My track day experience | Page 2 | FerrariChat

My track day experience

Discussion in '348/355' started by bobzdar, Apr 2, 2013.

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  1. gatorgreg

    gatorgreg Formula 3 Rossa Subscribed

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    Greg Griffin
    Nice! It's great to see you enjoying your Ferrari at speed.
     
    gatorgreg, Apr 4, 2013
    #26
  2. ProCoach

    ProCoach F1 Veteran Owner

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    Great post, Pete! Hope to see you when you come back down.
     
    ProCoach, Apr 5, 2013
    #27
  3. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    308 GTB, Apr 13, 2013
    #28
  4. fatbillybob

    fatbillybob Two Time F1 World Champ Consultant Owner

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    Barry,

    The real problem is that the 355 is just too flexible. The challenge plates are really just a lame bandaid that kicks the can down the road. If you are purely tracking your 355 I would start with a proper cage. The 355C cage is quite a POS! Then you can stiffen the chassis with properly placed tubes that will support the front end of the chassis down to the shock mounts. You know it is done right when you take a first drive and find the car undrivable and you need to go back to square one on set-up.
     
    fatbillybob, Apr 13, 2013
    #29
  5. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    We're starting with this right now, FBB. As you can see, the plates being fabricated are 3 mm thickness steel and differ a bit from the Challenge plates as illustrated in the Ferrari Challenge manual. They should yield stronger mounts when welded into place. My car has the Challenge springs it raced with in the 1995 and 1996 North American Challenge Series. The car was due for a four-wheel alignment and I asked my shop to go over the suspension carefully. That's how this hairline crack was picked up.

    My car was raced extensively from 1995 - 2002 and used in DE events for the past ten years. But we'll be looking for ways to stiffen and support the front end of the chassis as you suggest. What's being done now in a good, and necessary, start.

    Barry
     
    308 GTB, Apr 13, 2013
    #30
  6. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    I won't be racing, FBB. Just doing DE events. The car is street-legal so the inner door panels have been reinstalled. The original Challenge roll cage is still there which did its job well years ago when the car wound up on its roof.

    Please let me know some ideas you might have about stiffening the front end of the chassis.

    Barry
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    Last edited by a moderator: Sep 7, 2017
    308 GTB, Apr 13, 2013
    #31
  7. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    308 GTB, Apr 22, 2013
    #32
  8. bobzdar

    bobzdar F1 Veteran

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    Looks good, did you cut the old supports out or did these plates get added to the existing supports? I plan to do similar if cracking appears again on mine.
     
    bobzdar, Apr 22, 2013
    #33
  9. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    308 GTB, Apr 22, 2013
    #34
  10. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    Rather than weld the cracks, the section of cracked sheet metal was removed along the black outline (the cracks are indicated by the two heavy black lines), and a new piece was welded in prior to welding in the new supports. Again, you can see where the sides of the original supports were cut to allow for the addition of the new 3.0 mm support effectively making the support 4.5 mm thick in most areas.

    These are the 2200 lb front springs which were installed in 1995.
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    Last edited by a moderator: Sep 7, 2017
    308 GTB, Apr 22, 2013
    #35
  11. bobzdar

    bobzdar F1 Veteran

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    Do you think you could scan that portion and post it up - maybe in a new thread along with your fix? It might be useful to those with 348's and '95 355's if they have similar cracking issues.
     
    bobzdar, Apr 24, 2013
    #36
  12. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    I have the manual at home. I'll scan the illustration and post it here tomorrow.
     
    308 GTB, Apr 24, 2013
    #37
  13. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    308 GTB, Apr 25, 2013
    #38
  14. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    308 GTB, Dec 6, 2013
    #39
  15. 308 GTB

    308 GTB F1 World Champ Rossa Subscribed

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    308 GTB, Dec 6, 2013
    #40
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