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1. 

   Joined: Jan 2, 2013
   Posts: 6

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   fluxxnoise23

   Member

   from upstate ny

   can anybody tell me what the tolerance limit is on a '51 1BA

    

   fluxxnoise23, Nov 11, 2014

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2. 

   Joined: May 19, 2014
   Posts: 1,143

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   Bader2

   40 thou, some say 35 but that can be iffy.

    

   Bader2, Nov 11, 2014

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3. 

   Joined: Oct 10, 2009
   Posts: 2,731

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   joel

   ALLIANCE MEMBER

   from Osceola, In

   If you mean piston to head clearance, most guys on the Fordbarn say .050". For piston skirt clearance, my Motors manual says 10 lbs pull on a .003" shim for a steel piston and 10 lbs on a .0025" shim for aluminum. These are the tightest fittings.

    

   joel, Nov 12, 2014

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