Zero deck pistons? Quench distance

Discussion in 'Race 400/430/455' started by sean Buick 76, Sep 15, 2019.

  1. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    hi there. Just curious what quench distance people are using for race 455s with alum heads?

    It seems 28-35 thou should be an optimal distance between the pistons and head from what I have researched.

    What have you guys experienced?
     
    billiegoat likes this.
  2. gymracer01

    gymracer01 Well-Known Member

    I've ran .039, just put an engine together with .038. has steel rods.
     
  3. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    Thanks, I’m at 40 thou in my engine, also steel rods.
     
    Bens99gtp likes this.
  4. Bens99gtp

    Bens99gtp Well-Known Member

    Mine is not at 0 deck, but .010, I have .050 in mine......
    Is it optima . I'm sure not, but I wanted to stay around 12: . Didnt want to be forced to but 12 or 15 dollar a gallon gas that being closer to 14:1 would require
     
  5. Stevem

    Stevem Well-Known Member

    Just as important is that the top ring is no more then .185" below the top of the pistion so to have the least amount of crevice volume.
    This distance assumes NOS will not be run.
     
  6. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    Thanks for the info. Mine is a turbo engine. Zero deck pistons with custom dish and valve reliefs. 9.3:1 static compression and 40 thou quench zone.
     

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