347 Pistons and Cylinder Heads...

Discussion in 'Technical' started by mercgt73, Jul 11, 2009.

  1. mercgt73

    mercgt73 Member

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    For those stroker SBF engine builders out there...

    If you are shooting for a specific static compression ratio, do you prefer dished pistons with small chambers or flat tops with large chambers?

    For example, you could use small relieved pistons (like -5cc) with big 72cc chambers. Or you could use bigger relieved dished pistons (like -18cc) with small 58cc chambers.

    I would think you want the most material in the piston... what do you think?
     
  2. PaulS

    PaulS Member extrordiare

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    Small chambers with dished piston will , most often, provide the best knock prevention. (more quench area)
     
  3. baddad457

    baddad457 Member

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    Ditto, small chambers with a "reverse dome" piston. What I mean by this is these style pistons will have a dished portion only in the middle, leaving a flat portion around the perimeter to provide something to cause the "squish" effect against the bottom side of the head outside of the chamber.
     

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