Reciprocating engine cylinder contribution tester and method

A method for measuring cylinder contribution for an engine having a firing order, the method comprising the steps of:

• implementing a displacement measuring device for detecting engine block movement relative to a stationary structure;
• correlating the engine block movement to the firing order;
• and
• evaluating, for at least one engine cylinder, the engine block movement;
• and further comprising:
• attaching a first end of the displacement measuring device to the engine block;
• and
• attaching a second end of the displacement measuring device to the stationary structure.

A method for measuring cylinder contribution for an engine having a firing order, the method comprising the steps of:

• implementing a displacement measuring device for detecting engine block movement relative to a stationary structure;
• correlating the engine block movement to the firing order;
• and
• evaluating, for at least one engine cylinder, the engine block movement;
• wherein the evaluating step further comprises:
• determining a cylinder contribution from the engine block movement;
• and
• the determining step includes computing a derivative of the engine block movement.