Superformance 82 mm “High Compression” 308 pistons | FerrariChat
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Superformance 82 mm “High Compression” 308 pistons

Discussion in '308/328' started by dave80gtsi, Aug 25, 2009.

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  1. dave80gtsi

    dave80gtsi Formula 3
    Silver Subscribed

    Nov 3, 2003
    1,924
    Ohio
    Full Name:
    Dave Meredith
    #1 dave80gtsi, Aug 25, 2009
    Superformance 82 mm “High Compression” 308 pistons

    Would be interested to hear some feedback from those of you who have bought and installed these pistons in your 308 engine. Their relatively modest price makes them an attractive option to consider when doing an engine R & R.

    What sort of “High Compression” are we talking about here?

    Also, the use of these pistons requires a +1 mm overbore of the 308’s liners. The factory service manual clearly indicates that the first and second oversizes for these liners are +0.15 mm and +0.30 mm, respectively, and +1 mm obviously exceeds these specs by quite a bit.

    So, any problems attributable to “thin” liners as a result of this +1 mm overbore?

    Cheers - DM
     
  2. tomoshea

    tomoshea Formula Junior

    Dec 29, 2003
    541
    Ireland
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    Tom O'Shea
    #2 tomoshea, Aug 25, 2009
    Installed them on mine, engine in process of being run in.

    10.5:1 compression, they are JE forged pistons.

    Know a few people that have them, big impact on torque, lowers the engine exhaust note pitch, more of a growl

    No issue on overbore - but next rebuild will require new liners.
     
  3. Ferraripilot

    Ferraripilot F1 World Champ
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    May 10, 2006
    17,865
    Atlanta
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    John!
    #3 Ferraripilot, Aug 25, 2009
    If your liners turn out to be in good shape, you can always order a set of Wiseco pistons stock size. They are a bit less $ and are an equal or better product. From what I understand about the 308 engine, the bottom end ie, liners, rod and main bearings, crank, rods etc are incredibly robust and often do not require replacing unless of course one choses to go higher compression. I would think a simple compression increase with nothing else done would yield 15-20bhp on an injected engine. Add better cams to the equation and you are really taking advantage of the newly found compression and can make some nice power.
     

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