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Thread: pocket depth

  1. 07-13-2012 #1
    ultrafast30
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    Default pocket depth

    56 inch omc. 1986 block. looking for 150 + or - psi compression. What do I need to cut the pocket depth on the head to??
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  2. 07-13-2012 #2
    ultrafast30
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    New toy. Allison 13R .56 in motor on 15" mid with nitro case and lwp.
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  3. 07-14-2012 #3
    Powerabout
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    the std sst60 will get you close
    spec is on the apba site
    Exhaust relief holes will lower that if not plugged
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  4. 07-15-2012 #4
    ultrafast30
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    Thank you!!
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