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4 For more than 55 years JE Pistons has been the industry leader in the ... manufacture of high performance forged pistons. Now, the benefit of that experience, ... along with the technology and data gathered over the ... line to compliment our world-class piston designs; JE Pro Seal Piston Rings. Our ... close relationships with every major ring manufacturer in the world coupled with ... continuous development agreements with top racing teams in every major racing ... for todays demanding high performance piston ring requirements. These valuable ... allow us to offer our customers the most technically advanced choices of ... any ring supplier on the market. CUSTOM DESIGN AND MANUFACTURING ... Continuously working to improve piston ring technology available to the aftermarket ...

5 RING DIMENSIONS D-wall: A specification ... established by the Society of Automotive Engineers (S.A.E ... .) that dictates the radial width of a standard automotive ... piston ring by the use of the following formula; Bore diameter 22 ... ") 5 7 9 11 10 6 1 2 3 4 8 1. Free Gap: The end gap clearance when the ring is not ... compressed 2. End Gap: The end gap clearance when the ring is ... compressed to the bore diameter 3. Inside Diameter: The ... inside diameter of the ring at bore diameter 4. Outside Diameter: ... The outside diameter of the ring at bore diameter 5. Ring Axial Sides: ... The top and bottom surfaces of the ring 6. Torsional Twist: The installed ...

7 RING FUNCTIONS VERTICAL GAS PORTS FIGURE 7 ... FIGURE 8 LATERAL GAS PORTS RING ROTATION Ring rotation is critical for ... the distribution of heat to lower ... temperature sections of the piston and the cylinder wall. If the rings were ... stationary in the ring groove, the piston and cylinder wall would experience ... . This condition can cause scuffing of the cylinder wall, premature wear, piston ... to ring microwelding and possibly ring butting. The rate at which the ring ... rotates is determined by the piston rods, friction between the ring sides, ... bore finish, and cross hatch angle. TOP RINGS CONTINUED GAS PORTING Combustion ... pressure can be directed behind the top ring with the addition of vertical or ...

8 SECOND RINGS The most conventional second ring shape is ... a taper faced reversetorsional twist. The tapered face of the ring acts as a ... wiper that scrapes excess oil from the cylinder wall (fig. 1). It is important ... to prevent oil from entering the combustion process as this can lead to ... detonation which in turn increases carbon build up and ... raises both piston and oil temperatures. The chamfer ... machined in the back, under-side of the ring produces a twist in the ring, which ... its cross-sealing properties. Second rings are also available from JE Pro Seal in ... the Napier or hook style ring face. This design is considered ... superior to a tapered face design as the hook shape actually channels oil flow ...

5mm) .034" .121" .170" .121" .170" D014 RING FACE COATINGS JE offers a variety of ... ring face coatings specifically designed for ... individual operating requirements. The main types are Plasma Moly, CrN ( ... ), TiN (Titanium Nitride), and base ring material gas nitriding. These face ... a wear and scuff resistant face against the cylinder wall while also providing a ... very low coefficient of friction. These coatings are applied using PVD and ... Vapor Deposition) processes and are the premier ring coatings available today. ... . All non-stainless steel JE Pro Seal rings have a corrosive resistant coating that ... is specifically designed to enhance oil ... in . Plasma Moly filled ductile iron rings are coated with a manganese phosphate ... while steel rings are coated with an iron oxide compound ...

015" Application Bore x Bore x Min. Gap Top Ring 2nd Ring Oil Ring Rail Minimum Gap ... Per Inch of Bore RING GAP CHART RING GAP FILING PROCEDURES Check the ring ... gap chart (below) to determine the appropriate end gap for your bore size ... and application The prefered method of ring grinding is to use a quality electric ... ring grinding machine. Where costs are a ... consideration the use of a manual hand crank style ... grinder works Always file from the ring face towards the inside diameter of the ... ring to avoid chipping and/or marring the face coating File only one end of the ... ring, using the unfiled end as a reference point Debur ... sort stone or Cratex type product Note: The chart above is a general end gaps ...

TO USE THIS CATALOG This JE Pro Seal Ring catalog has been divided into three ... for ease of reference and convenience. The three sections are separated in the ... following manner: Rings Listed by Series (pages 19-31) a legend ... grid to assist you in determining the appropriate ring for your application. ... also features a complete breakdown of the ring set numbers into individual top, ... second and oil ring part numbers (except sport compact and ... motorcycle rings which are sold in sets only). Rings Listed by ... 33-37) In this section all JE Pro Seal ring sets are sorted by axial height then by ... application type. Domestic automotive rings are listed first, Import automotive ... second followed lastly by motorcycle ring sets. This listing is for ring sets ...