Catalog: JE Pro Seal Catalog
Company/Brand: JE Pistons
piston ring specification in JE Pro Seal Catalog by JE Pistons
racer JE Pro Seal now offers ring combinations with reduced axial heights ... radial and axial heights enable these rings better cylinder wall conformability. ... These steel rings utilize advanced materials and coatings ... help reduce friction and provide better ring seal. These ring sets include, Ultra ... Finish Rings (UFR), Critical Finish Rings (CFR), and Critical Tolerance Rings ( ... CTR). ULTRA FINISH RINGS JE Pro Seal Ultra Finish Rings (UFR) ... to compliment our Ultra Groove custom piston options, these rings are finished to ... also yields extremely flat, smooth ring sides that result in a surface finish ... 4 inRa (4 microinches). CRITICAL FINISH RINGS JE Pro Seal Critical Finish Rings (CFR ... present an alternative to Ultra Finish Rings with the same surface finish 4 inRa) ...
5 RING DIMENSIONS D-wall: A specification established by the Society of ... radial width of a standard automotive piston ring by the use of the following ... 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. ... 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 ... position of the ring due to a chamfered area on either ring ... side that helps the ring cross-seal 7. Ring Face: The section of the ring that ... between the inside diameter of the ring and the back of the ring groove when ...
7 RING FUNCTIONS VERTICAL GAS PORTS FIGURE 7 ... FIGURE 8 LATERAL GAS PORTS RING ROTATION Ring rotation is critical for ... 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 ... 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 ... lateral gas ports on the piston. Vertical gas ports are small holes ... into the top (or deck side) of the piston that lead to the back of the top ring ...
8 SECOND RINGS The most conventional second ring shape ... twist. The tapered face of the ring acts as a wiper that scrapes excess oil ... 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 ... wall and away from the underside of the ring (fig. 2). OIL RINGS The function of an ... oil ring is to remove oil from the cylinder wall ... . In most cases, an oil ring is actually three pieces, consisting of ... on the cylinder walls, crank, rods, and piston skirts. However, the oil film will tend ... contact with the cylinder wall as the piston slides across it, so a method of ...
are used when the wrist pin bore of the piston intersects or is machined into the ... piston oil ring groove. This occurs when a longer rod ... for a short compression height piston. The rail supports, when installed, rest ... on the bottom of the piston oil ring groove. These rails are specifically ... sole function is to support the oil ring and to prevent oil from escaping ... through the gap in the lower oil ring land created by the pin bore. This ... the oil rail support rotates in the ring groove and allows the rail support gap ... size listed in the charts below. OIL RING RAIL SUPPORTS REDUCED RADIAL OIL RAIL ... SUPPORTS FOR METRIC OIL RINGS WITH REDUCED RADIALS OIL RAIL SUPPORTS ...
10 ULTRA FINISH RINGS (UFR) JE Pro Seal Ultra Finish Rings ( ... in the industry. All Ultra Finish rings are lapped to within +/-.000050" axial ... Designed to compliment our Ultra Groove ring groove process available on JE custom ... pistons, these rings are used for the most demanding high ... is available for all JE Pro Seal rings. WHY RING FLATNESS IS IMPORTANT Uniform ... ring flatness allows tighter ring to groove clearance, thus promoting ... better sealing properties. An uneven ring axial height allows combustion gases ... to enter the gaps between the ring and ring groove, increasing the chances of ... COATINGS AND MATERIAL AXIAL HEIGHT RING FINISHES AND OPTIONS UFR +/-0.000050" 4 ... 00015" 4 inRa CTR +/-0.00015" Standard Ring Process Axial Height Surface Finish ...
5mm) .034" .121" .170" .121" .170" D014 RING FACE COATINGS JE offers a variety of ... ring face coatings specifically designed for ... ), TiN (Titanium Nitride), and base ring material gas nitriding. These face ... ) processes and are the premier ring coatings available today. Contact your ... . All non-stainless steel JE Pro Seal rings have a corrosive resistant coating that ... in . Plasma Moly filled ductile iron rings are coated with a manganese phosphate ... while steel rings are coated with an iron oxide compound ... rust from accumulating while the rings are in the package and provide a ... lubrication at engine start up. DYKES RING STANDARD RING ABOUT DYKES RINGS If you ... want maximum ring seal for your drag racing application, ... talk to your JE salesman about Dykes Rings. On the power and compression strokes of ...
procedure is essential to overall ring performance. To ensure that the bore ... torque plates in place and fit/gap the piston rings to their respective cylinders) ... finish normally produced by the rings after they have worn down the surface ... reduce break in time and increase ring life. Ra (Roughness average) Used to ... 280 GRIT MOLLY-FILLED 400-GRIT SAE SPECIFICATIONS SURFACE FINISH AFTER DIAMOND HONING ... the cylinder wall and 2. The rate of ring rotation. Excessively shallow cross ... can hinder or slow down the necessary ring rotation that allows dissipation of ... oil on the cylinder wall allowing the rings to skate over the surface leading to ... can result in dry starts and premature ring wear. A steep pattern angle can also ... create excessive ring rotation that will accelerate ring and ...
