Thread: 496 bbc compression on pump gas
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Old 11-11-2011, 11:33 AM
  #6  
oldandtired
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Originally Posted by desoto30
my concern would be the 0.015'' min piston-head clearance
x2
Minimum of .035-.040 with steel rods. Aluminum rods need even more.

Also need to check valve to piston.
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