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edmondclinton · 03-09-2015, 07:23 PM

KB pistons have recommended their minimum clearance to be .0015 and no more than .002 maximum, for years, on street engines normally aspirated with a 4.100 inch bore or less. My most recent catalog is 15 years old.

A close fitting piston rocks less, supports the rings better and seals the engine for the best power.

03-09-2015, 07:23 PM	#7
edmondclinton BANNED Join Date: Jun 2010 Location: austin, tx Posts: 195	Re: Tight Piston Clearance, Not Model A KB pistons have recommended their minimum clearance to be .0015 and no more than .002 maximum, for years, on street engines normally aspirated with a 4.100 inch bore or less. My most recent catalog is 15 years old. A close fitting piston rocks less, supports the rings better and seals the engine for the best power.