Ross Piston Rings

ROSS Racing Rings are ideal for all high performance applications including Turbo Chargers, Blowers, and Nitrous. Top rings are ductile plasma moly inlaid and barrel lapped for long life and quick seating. All ROSS top rings can be twisted numerous times without fracturing. Top rings are symmetrical, can be fitted in the groove either way and are coated with zinc phosphate to improve initial scuff resistance.

Second rings are cast iron reverse torsion twist and also zinc phosphate coated. Other performance advantages are conformability to cylinder wall, good wear resistance, and a specific OD shape that will encourage downward oil scraping and minimize upward scraping.

Oil rings are three-piece circumferential type, comprised of a stainless steel expander and two chromium plated carbon steel rails (segments). ROSS rails are narrower and are also of less radial depth. The radial depth of the rail greatly influences the ability to conform to the shape of a distorted bore. A small reduction in radial thickness will have a big impact on conformability. To prevent oil from escaping past the oil ring assembly via the upper side of the upper rail, an 18 degree angle on the rail support directs a component of the radial force applied in pressing the rail sides against the groove. Side width control of the ROSS oil rings is further enhanced by means of the rail support pads that are rolled into the outer section of the expander. These pads prevent undue rail side movement, which can effectively pump oil and increase oil consumption. These rings are manufactured exclusively to ROSS specifications by ACL of Australia.