{"id":13207,"date":"2021-04-17T20:01:22","date_gmt":"2021-04-18T00:01:22","guid":{"rendered":"https:\/\/maxtorqueperformance.com\/staging\/?p=13207"},"modified":"2021-04-17T20:10:20","modified_gmt":"2021-04-18T00:10:20","slug":"coated-pistons-measuring-advice-from-je-pistons","status":"publish","type":"post","link":"https:\/\/maxtorqueperformance.com\/staging\/index.php\/2021\/04\/17\/coated-pistons-measuring-advice-from-je-pistons\/","title":{"rendered":"Coated Pistons: Measuring Advice From JE Pistons"},"content":{"rendered":"
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Coated Pistons: Measuring Advice From JE Pistons<\/h1>\n
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By\u00a0<\/span>TODD SILVEY<\/a><\/span><\/span>\u00a0<\/span>APRIL 16, 2021<\/span><\/div>\n<\/header>\n

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Coating technology for engine internals is becoming more commonplace today as a proof-positive way to increase wear characteristics and overall life of performance and racing engine components.\u00a0<\/span>JE Pistons<\/a>\u00a0<\/span>has provided some informative advice for measuring a coated piston for overall piston diameter. These measurements contribute to the formula between the piston skirts and the cylinder bore, better described as piston-to-wall clearance.<\/p>\n

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Measuring piston-to-wall clearance is essential when building your new engine. In extremely critical motorsport engine build applications, the thermal expansion of the piston requires exact tolerances. Most commonly used in racing are forged pistons which expand more than cast pistons, necessitating this attention to detail.<\/p>\n<\/p><\/div>\n

Essentially, there are correct tools and measuring procedures and, unfortunately, common incorrect ways to measure coated piston diameters. For example, the engineers at JE highly recommend never using a dial caliper when measuring piston diameter.<\/p>\n

Using more simplistic devices such as a caliper can result in incorrect readings up to .003-inch. Different piston manufacturers may vary with piston-to-wall clearance, depending on their piston materials used. Whatever your specific tolerances may be, they are typically measured down to .0001-inch of accuracy.<\/p>\n

Exact Cylinder Bore and Piston Diameter Measurements<\/strong><\/p>\n

Measuring your engine block cylinder bores requires a precision dial-bore gauge. Pretty much, that is the end of the discussion there. High-end dial bore gauges are the tool of choice. Similar to using incorrect dial calipers when measuring pistons, a snap gauge is another tool that will not provide the needed accuracy.<\/p>\n

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