Supertech piston clearance

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  • 20Vcqdriver
    S2Forum Maniac
    • Jun 2007
    • 829
    • Country: United Kingdom

    #1

    Supertech piston clearance

    How many have used SUPERTECH pistons.
    Managed to get a set from Rosten performance before website and Geir Rosten vanished.
    The spec sheet says that the minimum clearance for these pistons is 0.07mm and have had mine set to 0.075mm, some are saying it should have been 0.085, but as supertech use an alloy with 18% less expansion than the likes of JE i should be OK but be interested to know what others using supertech have used. Cheers
    1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
    2004 A4 2.5TDi convertible, re-mapped to 180bhp
    2011 A5 sportback 3TDi-Backbox delete, remap
  • filip.krticka
    S2Forum Enthusiast
    • Sep 2008
    • 170
    • Home: Czech Republic

    #2
    I'm going to use Supertech piston for 81,5mm diameter in my engine build as well. I have had set mine to 0.08mm.
    BTW I have bought them from Rosten as well. According to the Geir gap should be ok.

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    • FCP-ENGINEERING
      S2Forum Enthusiast
      • Feb 2011
      • 173
      • Country: Lithuania

      #3
      Supertech writting 0,07mm it is minimum clearance good for dayli use, for drag racing circuit 0,08-0,085mm.
      Audi S4 2.6 20V STROKER kkk26/27

      Comment

      • 20Vcqdriver
        S2Forum Maniac
        • Jun 2007
        • 829
        • Country: United Kingdom

        #4
        Originally posted by FCP-ENGINEERING
        Supertech writting 0,07mm it is minimum clearance good for dayli use, for drag racing circuit 0,08-0,085mm.
        Should be OK then as not using them upto daft boost pressures (max will be 28psi) and for a road/show car with a bit of fun now and again.
        1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
        2004 A4 2.5TDi convertible, re-mapped to 180bhp
        2011 A5 sportback 3TDi-Backbox delete, remap

        Comment

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