355 - Ferrari F355 Challenge Steering rack | Page 10 | FerrariChat

355 Ferrari F355 Challenge Steering rack

Discussion in '348/355' started by SOstergaard, Sep 1, 2021.

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  1. deuce49

    deuce49 Karting

    Sep 25, 2011
    141
    Scottsdale
    Full Name:
    BC
    Yes it's out of the car, again...
     
  2. deuce49

    deuce49 Karting

    Sep 25, 2011
    141
    Scottsdale
    Full Name:
    BC
    Interesting, I will check them out. Thank you
     
  3. ShineKen

    ShineKen F1 World Champ
    Silver Subscribed

    Aug 3, 2007
    19,892
    Southern California
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    Nostradamus
    @yelcab in Norcal would be the man to rebuild it.
     
  4. Qavion

    Qavion F1 World Champ
    Silver Subscribed

    Feb 20, 2015
    14,271
    Sydney
    Full Name:
    Ian Riddell
    Do you know what the problem was with the Volvo kit?

    Volvo kits were recommended on FChat

    https://www.ferrarichat.com/forum/posts/146256631/
     
  5. Philipnz

    Philipnz Karting

    Apr 12, 2015
    222
    Whitianga New Zealand
    Full Name:
    Philip Hart
    The Volvo kit repaired my Fiorano rack. Is the challenge rack the same?
     
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  6. ShineKen

    ShineKen F1 World Champ
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    Aug 3, 2007
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    Nostradamus
    Yes. Exact same.
     
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  7. ShineKen

    ShineKen F1 World Champ
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    Aug 3, 2007
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    Nostradamus
    If you no longer want to deal with the headache, I’ll gladly give you $6k for it as is :).
     
    deuce49 likes this.
  8. 601

    601 Karting

    Dec 19, 2010
    223
    California
    This is where I will go too when the time comes. Dale and Eric at GP Autoworks are awesome.
     
  9. deuce49

    deuce49 Karting

    Sep 25, 2011
    141
    Scottsdale
    Full Name:
    BC
    Lol, thanks for the offer but definitely not getting rid of it for this restoration ;)
     
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  10. Flynt

    Flynt Rookie

    Aug 23, 2013
    45
    I'm rebuilding my standard rack now. I can only answer for myself, but here's the problem I've run into with the Volvo kit.
    Seal 12014254B (Corteco part number) AKA 34002485 (TRW part number). The original I pulled out and destroyed in the process is a double-wiper radial shaft seal. The one supplied in the kit is a single-wiper and very delicate. If I do end up using the seal supplied in the kit, I'll have to make a tool to press it in, because where it seats in the bore is thin and it lacks the broad lip to press on. I'll have to press it in without damaging the wiper spring or whatever that things called.

    I bought a few Corteco 12014254B seals off ebay from a vendor in Lithuania. Correct dimensions in their listing. They showed up in Corteco bags with that part number on them, but they're totally different seals - no shared dimensions, some weird big metal flange built in. Some other places say they have these seals, but shipping is $60 for a $3 part..

    It looks like this seal just keeps grease from migrating up the input shaft, and since this one is for my personal car I was just going to give this single wiper seal a shot..


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  11. ShineKen

    ShineKen F1 World Champ
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    Aug 3, 2007
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    Nostradamus
    I assume you are restoring a challenge car? If so, maybe a trade is in store? I have a ton of challenge parts.
     
  12. deuce49

    deuce49 Karting

    Sep 25, 2011
    141
    Scottsdale
    Full Name:
    BC
    Yes, I'm doing a complete restoration on my 1997 Challenge. I have most of everything I need, however, there are always a few parts here and there that always rear their head up. I'll shoot you a DM
     
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  13. ShineKen

    ShineKen F1 World Champ
    Silver Subscribed

    Aug 3, 2007
    19,892
    Southern California
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    Nostradamus
  14. ShineKen

    ShineKen F1 World Champ
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    Aug 3, 2007
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    Can we can a good pic of the rack?
     
  15. Mitch Alsup

    Mitch Alsup F1 Veteran

    Nov 4, 2003
    9,724
    Get rid of the power steering pump.
    insert a 348 rack.

    But here, you are going to fight the caster specification (around 7º for F355 and around 5º for 348) which may make the unassisted rack heavy, but because of the top speed advantage of the F355 over 348 you may find a high speed instability with this little caster.

    Alternate plan:
    Get rid of power steering pump (or connect output to input.)
    connect PS inputs to the F355 rack to each other to simply recirculate fluid.
     
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  16. Targatime

    Targatime Formula 3

    Feb 22, 2014
    1,449
    Los Angeles
    The problem with the 355 rack isn't the assist, it's the ratio.
     
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  17. PAUL500

    PAUL500 F1 Rookie

    Jun 23, 2013
    3,136
    Another option could be fitting one of those reducer boxes into the steering column linkage, and keeping the PAS
     
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  18. mclaudio

    mclaudio Formula 3

    Dec 13, 2003
    1,272
    Seattle area
    Full Name:
    Claudio


    My Challenge rack (2.75 ratio) underwent this alternate plan. If one derives a lot of driving enjoyment out of a very communicative steering car, I would highly recommend.

    Another thing I’ve done in a different car is a 997 GT3 Cup race car ps (electric pump-assisted hydraulic) with a custom on/off switch (hydraulic to manual). GT3 Cup ps is one of the best hydraulic ps I’ve experienced. Yet if I want the manual steering feedback, I can switch off the ps.
     
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  19. Targatime

    Targatime Formula 3

    Feb 22, 2014
    1,449
    Los Angeles
    In my experience you don't get manual feedback on hydraulic rack with the pump disconnected. You get "oh my god I'm pushing around a bunch of hydraulic fluid with my arms" feedback.
     
  20. GatedF355GTB

    GatedF355GTB Karting
    Silver Subscribed

    Dec 5, 2017
    227
    SF Bay Area
    Full Name:
    Joe
    993 owner here. I put a 340mm momo steering wheel in my F355. While not as good as the 993 steering, it's close enough. There's no way I'd convert to a manual rack on a F355.
     
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  21. OCKlasse

    OCKlasse Formula Junior
    Rossa Subscribed

    Oct 5, 2006
    709
    Newport Beach, CA
    Full Name:
    Brandon K
    340mm is the perfect size for the F355, IMO.
     
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