Steel corrodes causing cylinder wear and blow-by that results in expensive cylinder changes, damaged cams and lifters, top overhauls, or worse, the loss of an engine.
Nickel Doesn’t Rust!
RAM started using nickel cylinder bores in 1998. During all these years and over 35,200 nickel cylinders later we still have not had even one corrosion or wear-related problem.
You Need Nickel Cylinders!
RAM Nickel Cylinders incorporate the ECi Nickel+Carbide™ process of depositing a layer of Nickel / Silicon carbide onto the bore of a steel barrel. Silicon particles provide a wear-resistant surface, while nickel acts as the matrix to hold these particles in place. Nickel, proven not to corrode in any environment, and silicon carbide, proven tough and resistant to abuses of extreme heat – these elements, paired with plasma-coated rings and mineral-based ashless dispersant oil, make this cylinder far more durable and longer lasting than any other cylinder bore on the market today.
Uniformity of Composition
During the nickel plating process, silicon carbide particles are continuously blended into the electrolyte that is transferring nickel ions to the new steel barrel. As a result of this proprietary blending process, both the nickel and the silicon carbide are applied concurrently, intermixed like the aggregate in concrete. Such consistent mixing of the nickel and silicon carbide ensures a uniform blend across the entire cross section, thus providing an unparalleled level of wear resistance and corrosion protection. Over a TBO period, the bore wear surface remains consistently hard, oil wettable, and durable.
Plateau Bore Finish
The final operation in Nickel+Carbide™ coating process includes a carefully controlled, 2-step honing procedure so that a “plateau finish” is imparted to the bore surface. As the name implies, the finish consists of plateaus and subsurface valleys, which are essential to the ring break-in process, as well as proper lubrication of the ECi plasma-coated compression ring and bore interface system.
Plasma-Coated Top Compression Ring
Plasma faced piston rings are made from cast iron and have a groove on the outside periphery that is filled with a thermal sprayed metal/ceramic material. The sprayed material forms a porous matrix that holds oil and has self-lubricating qualities to minimize barrel wear at the top and bottom of the ring travel. After spraying, the periphery is machined to size with a barrel shape in order for the ring to create a wedge of oil as it rides up and down the cylinder bore. The ring design is an integral part of the excellent wear and oil control system. For the performance required of high BMEP engines, operating at high altitudes with extreme temperature variations, a plasma-coated top compression ring works best. It has a very low tendency to scuff, and at high temps, it forms oxides to create self-lubrication.
The texture (surface finish) of the Nickel+Carbide™ coating is smooth by comparison to a traditional ring finish for steel. Except for loss of cross hatch, there is very little difference in appearance between a fresh RAM Nickel+Carbide™ Cylinder bore and a bore with several hundred hours of operating history. Externally, the area of the cylinder which normally receives a color code to indicate the type of cylinder bore material will be painted with two (2) silver bands.
Cylinder Bore Hardness Comparison
Nickel+Carbide™ is a coating consisting of extremely hard silicon carbide particles in a nickel matrix. The high hardness and oil wettability of the silicon carbide particles effectively prevents wear from occurring throughout the life of the cylinder.
Best Cylinder Warranty in the Industry
RAM Nickel New Cylinder Package cylinder assembly is warranted to be free from defects in material and workmanship (parts and labor) under normal use and service for a period of one year following the date of shipment from RAM. After one year, the warranty is pro-rata to that of the manufacturer’s recommended time between overhaul (TBO) for the engine with a minimum accrual of 40 hours per month. Furthermore RAM warrants each nickel process cylinder bore to remain free of corrosion and wear beyond service limits in normal operating conditions during TBO, or for a period of five (5) years following date of shipment from RAM, whichever occurs first. RAM’s obligation will be to repair cylinders with new limits nickel process bores and issue a new set of rings. This process does not include labor costs.