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WARNING: It is your responsibility to check pistons for compliance to your ordered specifi cations BEFORE ASSEMBLY. Pin fi tting, number stamping, block fi tting, dome compatability, cylinder head clearance, etc..
31 maj 2023 · Piston-to-wall clearance is a crucial measurement for any engine, but different applications can require wildly different specs. We explain the science of why.
9 sie 2021 · What I'm trying to figure out is if the 4-6 thou piston to wall clearance is excessive for OE Ford pistons, either the forged or cast ones, for a DIY rebuild. That's what I'm getting for measurements and I only plan to hone the cylinders to seat the rings.
When a loose fit engine is desired the rigid skirt design of the KB Piston allows the builder a choice without fear of piston damage. See the clearance chart below for minimum and realistic maximum loose fit clearance for KB Pistons.
When measuring for piston to wall clearance, measure at widest point of piston skirt 1.300″ from bottom of oil ring groove, 90 degrees from wrist pin hole. Refer to piston kit specification sheet for recommended piston to wall clearances.
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Measure the piston at the bottom of the pin bore and perpendicular to the pin axis. Using a felt tip marker, write the piston diameter size on the pis-ton. Arrange the pistons with the smallest piston to the front and back cylinders and the largest pistons to the middle cylinders.
