$603k for CS on BAT! Has this world gone Batty? | Page 4 | FerrariChat

$603k for CS on BAT! Has this world gone Batty?

Discussion in '360/430' started by 996cupracer, Sep 9, 2025.

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  1. Kevin Rev'n

    Kevin Rev'n Two Time F1 World Champ
    Owner Silver Subscribed

    Nov 29, 2009
    24,676
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    Kevin
    Curious me...
    For valve springs, what can be done with their "position" on assembly to get more performance?
    For better machining and polishing of surfaces, is this a thing where they changed the finish specs or do they have a black box room/process center where the workers in there put out a higher quality product using better machines and techniques?
    For blueprinting in a production environment, are you saying that they put more checks into the CS engine assemblies? ...to meet the F131 engine specs?
    Trying to learn more about the brand, thanks for any reply!
     
  2. Kevin Rev'n

    Kevin Rev'n Two Time F1 World Champ
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    Nov 29, 2009
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    Was he asking how to get an "OWNER" badge in F-Chat? lol
     
  3. MrRdStr

    MrRdStr Formula Junior

    Feb 24, 2008
    751
    Southern California
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    AJ.
    rob5819 and Michael B like this.
  4. Michael B

    Michael B F1 Rookie
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    Apr 28, 2004
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    Michael
    Yes, I too appreciate the interest.

    So many years ago when I read the factory broadcast on this (Challenge Stradale engine) I too wanted clarification on valve spring positioning... At the time I was in the height of my engine building period (Porsche hotrodding) and this interested me to no end. I was (and still do) using titanium valve spring caps / keepers and was well versed in the gains of lighter & matched bits for rotating assemblies etc. So, intrigued I looked for the answer. Without going too geek here ~ perhaps you know the valve spring height on a racing engine can be adjusted for gains, including gains with change in spring rate etc. Assuming translation to English, I think that may be what was implied by the factory description. I could not find any data on Ferrari actually moving the angle or location. So... That is most likely it.

    As for polishing, this is a hotrodding bit that has produced results from way back. The polishing has many facets that give performance, including better windage resistance, and strength to the metallurgy from the polishing procedure.

    Blueprinting is the final wizardry that does not actually add power, but it makes so that the engine has less power loss while rotating. To clarify this means that it actually has less parasitic losses (from the weight minimizing & matching of internal parts) so that its final output is higher then that of a similar engine with lower tolerances. In general terms the engine does not have to fight as hard to make power. Making it a more efficient (more powerful) unit.

    The Challenge Stradale. Ferraris factory hotrod.
     
    Kevin Rev'n and ifeelfree0 like this.
  5. rob5819

    rob5819 Formula Junior

    Dec 12, 2017
    964
    San Diego
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    Rob Barry
    Bummer, I was fairly interested in at $395K, but when the price changed to $495K I gave up. It is a gated conversion so couldn't really figure out how that would affect pricing.
     
  6. Kevin Rev'n

    Kevin Rev'n Two Time F1 World Champ
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    Nov 29, 2009
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    Kevin
    IMO that was for your offspring to deal with...if they turned out to be car people!
     

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