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Compression ?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ftn96, Apr 17, 2001.

  1. ftn96

    ftn96 1/2 ton status

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    I have an all stock 5.7L 350 (90 model).
    Does anyone know what the stock sompression is on these things?

    #2 I have read somewhere that this motor has 60cc heads, is this correct? Sounds way too small for a stock app.

    . How much would the compression increase with just going 30 over on a rebuild?

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  2. Blazer1970

    Blazer1970 1/2 ton status

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    I think those motors have 64cc heads, and should be about 9.5:1 compression. An .030" overbore will not change the compression ratio significantly.

    Tim

    70 Blazer CST 4X4 350 SM465 NP205
    87 Burb 4X4 350
    01 GMC 2500HD 4X4 Duramax/Allison
     

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