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Piston Ring Size Chart

Piston Ring Size Chart - Multiply bore size x ring end gap factor. Web analyze and compare your rings to these charts to help identify which specific style rings your piston (s) came with. Most hastings performance rings are available in file fit (+.005”) oversizes. Web a piston ring’s diameter is directly proportional to the cylinder bore. End gaps for performance application. The second ring end gap would be 4.000 x.0045″ =.018″. Measuring piston diameter is not determined at the ring area; Web the dimension from one side face to the other, or ring thickness, usually expressed in fractional sizes like 1/16 inch, decimal sizes like 0.043 inch, or metric sizes like 1.5 mm. The second groove ring function is to help aid in scraping oil down the cylinder. Back clearance is the difference between the depth of the piston groove and the radial wall of the ring.

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Web The Following Chart Indicates The Specifications For Compression Ring Gap As Outlined By The Sae (Society Of Automotive Engineers) As Standards For The Automotive Piston Ring Manufacturers.

If an overbore of the cylinder has occurred, then the proper piston ring size (and piston) must be ordered to properly fit. Web use the chart below to determine the minimum ring end gap. Bill mcknight at mahle aftermarket teaches you how to measure ring face width, ring radial wall thickness and intended bore size. For a naturally aspirated street engine using a cast piston with 4.000″ bore, the top ring end gap would be 4.000 x.004″ =.016″.

Want To Know More About Ring Material And Design?

Web tough guy tech tips. Multiply bore size x ring end gap factor. Web a piston ring’s diameter is directly proportional to the cylinder bore. In a performance application, an optimized plateau finish should have a rpk value of less than 12 microinches, rk of around 20, and rvk of around 40 microinches.

The Second Ring End Gap Would Be 4.000 X.0045″ =.018″.

Web piston diameter dictates the final bore diameter. Web when using a manual ring filer, start by making six to ten turns of the disc with light pressure on the ring, and then recheck the clearance. Most hastings performance rings are available in file fit (+.005”) oversizes. Web what makes piston ring selection and ring endgap so important to engine life and power?

Professional Racers And Engine Builders Know That Precisely Setting The Ring End Gaps By File Fitting Is Well Worth The Time And Effort.

Measuring piston diameter is not determined at the ring area; It is critical that the piston ring does not protrude past the adjacent piston land or severe engine damage will occur. Web the dimension from one side face to the other, or ring thickness, usually expressed in fractional sizes like 1/16 inch, decimal sizes like 0.043 inch, or metric sizes like 1.5 mm. End gaps for performance application.

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