what kind of compression?

Discussion in 'The Bench' started by 70buick455, Apr 10, 2005.

  1. 70buick455

    70buick455 Well-Known Member

    I'm building a 455 buick... 1974 Block,.030 overbore, new forged steele pistons(not flattops,)some dish yet, chromeolly rings, Stage one Heads,(large Valves), 110deg. cam,(torquemaster from Compcams) 790 or 800 CFM Rochester Quadrojet. All emissions , AC etc removed. Stock crank, been polished tho. .. Just curious, what kinda compression is stock, or what kinda compression might I have when Done/? some one said 9.5:1, Does this seem right?
     
    70buick455, Apr 10, 2005
    #1
  2. mechacode

    mechacode Well-Known Member

    Stock was probably 8:1 since 74 was a smogger year.
     
    mechacode, Apr 10, 2005
    #2
  3. gusszgs

    gusszgs Well-Known Member

    Alot of variables here..... thickness of head gasket, what cc of heads, are you having the block decked? Also what is the cc of the dish in the piston?
     
    gusszgs, Apr 10, 2005
    #3
  4. meanmotor74

    meanmotor74 mmm.....pineapple

    Stock 74 455s had 8.5:1 compression if that helps.

    Patrick
     
    meanmotor74, Apr 10, 2005
    #4

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