The "Predator Piston"
by Kiss-Engineering.
Computer Designed to Perform Specific

High Volume Lubrication Functions

Creates the Directional Flow of Oil

Up to 33% Lighter

Produces High Volume Lubrication

Absorbs Less Horsepower During  Operation

Utilizes "Total Seal" Compression Rings  

Believed Lubrication Functions of Conventional Piston

   Function 1.   During the upward and downward motion of the conventional piston, the inside of the piston is splashed with oil. As the piston continues to move up and down the oil migrates into the oil ring assembly through small holes on the inside of the piston. This process traps oil between the upper and lower oil rails creating a small "band" of oil that is deposited on the cylinder wall as the piston travels up and down.

   Function 2.   During the upward and downward motion of the conventional piston, oil splashed on the cylinder wall is scraped by the oil ring then migrated through the oil ring assembly to the inside of the piston and returned to the crankcase.

Problems with Conventional Piston Function

     Both of the above functions fail to evenly distribute a large amount of oil required for cleaning, cooling and lubricating the piston, rings and cylinder wall. The low volume of oil that migrates through the oil ring assembly makes possible the burning and caking of oil in the oil ring assembly reducing even further the effectiveness of this lubrication process. In addition large piston skirts on conventional pistons prevent maximum exposure of cylinder wall to splashing oil, increasing heat and wear on internal moving parts as well as faster oil breakdown.

Lubrication Function of the "Predator Piston" by Kiss-Engineering

     Kiss-Engineering has designed the "Predator Piston" to create the controlled directional flow of a high volume of oil in the pistons lubrication process. A "ramp" has been added on the inside of the piston. On the downward motion of the piston, splashing oil is collected by the "ramp". On the upward motion the "ramp" creates a pumping action, forcing oil through holes in the piston that are evenly spaced 360 degrees around the piston and into the oil ring assembly under pressure using "G" force. The lower oil rail has been cerate to allow the high volume of pumped oil to be evenly distributed with less restriction on the cylinder wall. The high volume of directional oil flow increases cleaning, cooling and lubrication, also significantly reducing the possibility of burning and caking of oil trapped in the oil ring assembly. The availability of this larger amount of oil on the cylinder wall will allow the piston to hydroplane, reducing drag. The "Predator Piston" has been designed to allow the load transfer from compression and power stroke to be transferred directly to the wrist pin assembly. This has been accomplished by connecting the wrist pin assembly directly to the top of the piston rather than the sides of the piston. This feature allows for the oil "ramp" to travel behind the oil ring assembly a full 360 degrees uninterrupted. The wrist pin is lubricated by a "funnel" located above the wrist pin that collects oil using the same process as the "ramp". This design has resulted in a significant reduction of the size of the piston skirt and overall piston weight. Because of the high rate of directional flow, oil completes the piston and cylinder lubrication process and is returned to the crankcase for cooling and filtering at a higher rate. "Total Seal" compression rings have been used to further reduce "blow by" and loss of compression. The "Predator Piston" has been specifically designed to maximize and control the lubrication function of the conventional piston.