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Rebuilding 350 - Help with bearing clearances

Discussion in 'The Garage' started by Blazer79, Mar 19, 2005.

  1. Blazer79

    Blazer79 1/2 ton status

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    Hello:

    It's been a while since I posted in CK5. I had to do some rehab because it absorbed so much of my time :D I'm glad to be back writing in this forum.

    I'm rebuilding the 350 which originally came in my 79 Blazer. It's going into my 1986 Camaro. I'm ready to assemble it with:
    -KB Silvolite 120 pistons .020 over
    -Total Seal TSS rings
    -Scat 4340 I rods
    -Stock crank .010 under both main and rod bearings
    -Pro topline 170cc 72cc cyl heads
    -Crane 216/228 compucam
    -TPI

    I'll be mostly using it as a daily driver with the ocasional race at the strip once in a while just for fun.:cool1:

    The engine is ready for assembly. So far I measured these clearances at the main bearings:
    No.1 0.0025
    No.2 0.0030
    No.3 0.0025
    No.4 0.0030
    No.5 0.0020

    What confuses me is that I don't know which recommended bearing clearances to use. :confused:

    http://www.chevytech.net/1c6o1.html recommends:
    No. 1 0.0008 - 0.0080
    No. 2-4 0.0018 - 0.0020
    No. 5 0.0010 - 0.0036
    :confused:
    According to CHEVY PERFORMANCE SMALL BLOCK by John Baechtel, clearances for "high perf. stret" should be:
    0.0025-0.0037
    :confused:
    According to John Lingenfelter on Modifying Small-Block Chevrolet, clearances for a "daily driven small block"
    Mains 1-4: 0.0020-0.0025
    No. 5 0.0025-0.0030
    :confused:
    I know there are some experienced builders in this forums. Could you please tell me what to do in this situation? ;)

    Any help greatly appreciated.
     
  2. Corey 78K5

    Corey 78K5 1 ton status

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    Hey Juan good to see You back here on CK5:thumb: :saweet: :D Now stick around this time:deal:
     
  3. Blazer79

    Blazer79 1/2 ton status

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    Glad to hear from you too Corey! I hope everything's fine.

    :cool1: Yeah, the dark forces of CK5 are pulling me back again. :laugh:
     
  4. Blazer79

    Blazer79 1/2 ton status

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