Stack Sealing Tests

During never before conducted Sprint Car system efficiency testing replicating full engine demand and using tracer dye, it became readily apparent that careful attention must be applied to the insertion of injector stacks into the injector body/adapter. Regardless of what brand of injection system is used, stack insertion depth and prep is critical. Stacks must be seated against the machined stop in order to minimize the potential for dirt ingestion. Measure the distance from the top of the adapter to the stop and transfer this dimension to the stack. Place a mark on the stack to be sure it’s fully seated.

Kinsler systems leave the factory with an O ring and grease applied. In this manner, the system is sealed to mitigate any leakage. Engler systems do not offer an O ring for sealing. In either case, it is essential that grease is applied to both the adapter and the bottom of the stack. This offers the best protection against dirt entering the engine. Particulate that damages engines and contaminates oil is very small. Sprint Car racers operate in an environment where 1-10 micron dust is commonplace. As an average, that’s 1/20th the diameter of a human hair! Paying close attention to all possible leak paths will ensure maximum wear protection.