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Variances in cylinder bore surface finish influence oil consumption, wear, and scuffing. Recently published studies indicate oil consumption is a significant contributor to pre-ignition in small high power density engines and natural gas engines. Implementation of a three dimensional Surface Finish Analysis System to quantify the honed surface provides multiple benefits in engine development. The resultant improved cylinder bore surface can be utilized to minimize development time. Three Dimensional surface finish analyses provide higher quality surface finish data permitting fewer measurements with increased statistical confidence when compared to the historic industry standard, Two Dimensional Profilometer finish data. The three dimensional analysis systems build on the advantages already established by a Volvo, Mercedes, and Volkswagen 14-year program.

Operating cylinder bore geometry and finish have been identified by numerous investigators over the years as having the capability to modify oil consumption, blowby, wear, and engine friction. It has also been recognized that cylinder bores, even though machined and honed to a round state at the time the block is produced, change shape when cylinder heads are installed and when the engine reaches normal operating temperatures. The concept of heating the block with a simulated head plate and then honing the cylinder bore to achieve a round bore has been evaluated by race engine builders over the years. A number of Formula One engine builders have utilized cylinder bore geometries which were developed while the bores were honed with the cylinder liner installed in a heated block with a heated hone plate.