Silvolite is the parent company for the Keith Black line. The line started with the Hypereutectic series of pistons and grew to include the whole line of claimer series pistons, the standard forged pistons series and the premium forged pistons series. In 2010 Silvolite decided to separate the forged pistons from the hypereutectic pistons and introduced the new name as Icon Forged Pistons, This new name incorporates all of the forged pistons made previously by Silvolite under the KB name.
KB is offering performance which is not just limited to the road. Right out of the box, KB supplies diamond machined pistons that feature a light weight design and are held to plus or minus one gram within the set. In addition, KB holds skirt sizes of less than one half thousandths (.0005") tolerance from piston to piston.
KB pistons are made of high-strength, T6 heat-treated, 390 hypereutectic aluminum alloy. This alloy yields better thermal efficiency with less expansion and superior wear characteristics. The KB design, combined with the hypereutectic alloy, can be run with less than .001" piston-to-wall clearance with no scoring; the tightest clearances in the industry. In addition, the thermal efficiency of the 390 alloy allows engine timing to be reduced, and the tight clearances virtually eliminates piston noise. All of these features combine to give you an engine that runs quiet, efficient, and longer than previously possible.
United Engine relocated to Carson City, Nevada in 1978, where it has continued to grow. Since it's move, United Engine has continued to look at it's role in the domestic and world market. Currently, UEM manufactures the Silvolite OE aftermarket piston line, KB Performance Pistons (including the motorcycle division), and The Claimer Performance Piston Series. United Engine and Machine Company is now enjoying more than 80 years in business.
When you examine a piston you rarely examine the bottom of the ring groove. Even if you looked at the grooves of the same style pistons, seeing a difference without a micrometer would be difficult. From manufacturer to manufacturer, however, there can be differences in what is called the root groove diameter. The main difference is in what is called compensated ring grooves. What is compensated ring groove? Basically the root groove diameter is moved with the oversize. For years manufacturers would supply the STD root groove diameter for all oversize's. A .060 oversize piston would have the STD root groove diameter. A compensated ring groove means the root groove diameter would move with the oversize. A .060 oversize piston has the root groove moved out .060. In addition, the ring manufacturers compensate each oversize to match the piston, so there is no need to worry about matching rings and pistons.By compensating the ring grooves it cuts down the space between the back of the groove and the ring. This cuts down on un-burnt fuel stored in this area. In addition, compensated ring grooves make the land stronger, help rings to seat sooner, and allow the top rim of the piston to run cooler. All KB pistons are supplied with compensated ring grooves.
Special Installation procedures must be followed with the Keith Black Piston Line.
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RPM Machine-Performance Auto Parts
PO Box 281
Cedar Valley, Utah 84013
We carry parts from scat, je, wiseco, ross, crower, callies, eagle, cat, eagle
Most of our rotating assemblies include forged pistons
and 4340 steelcranks
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