typical/acceptable 348 leakdown numbers? | FerrariChat
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typical/acceptable 348 leakdown numbers?

Discussion in '348/355' started by Ferraripilot, Oct 26, 2010.

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  1. Ferraripilot

    Ferraripilot F1 World Champ
    Owner Project Master

    May 10, 2006
    17,947
    Atlanta
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    John!
    #1 Ferraripilot, Oct 26, 2010
    I know a feller who is looking at a 348 and is having a PPI performed. Looking for a preliminary estimate as to what the mechanic should be looking for in regards to acceptable engine tolerances. 8-15% leak max ok? I'm just not 100% sure with 348s.

    thanks all.
     
  2. chas-3

    chas-3 Formula 3
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    Jan 28, 2009
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    Colorado
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    Chuck
    #2 chas-3, Oct 26, 2010
    Last edited: Oct 26, 2010
    I'm no expert but I would say "Hell No!". I think 2% is considered "perfect" or as new. I would think anything over 8% would need to be addressed. Only reason I have any idea here is my 348 just went through a complete top end rebuild. Just my novice 2 cents though. I'm sure one of the experts will speak up here. :)
     
  3. Ferraripilot

    Ferraripilot F1 World Champ
    Owner Project Master

    May 10, 2006
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    John!
    #3 Ferraripilot, Oct 26, 2010
    My personal cutoff point is around 13% although plenty of people run 13-15% leakdown motors just fine and they pass emissions and have good performance etc. For instance, prior the the rebuild, my 308 was around 15% across the motor and dyno'd better than any stock carb 308 I have ever seen and always passed emissions. I know later cars call for different schools of thought so I am hoping someone keys in :)
     
  4. vvassallo

    vvassallo F1 Veteran

    Aug 4, 2006
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    Vince V
    #4 vvassallo, Oct 26, 2010
    I think I might accept up to 8%; 10% might be a reach though. Depends on what the Ferrari mechanic thinks.
     

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