[Bob In Ct]

Hey MM:
Assuming a 4 inch stroke the bearing are traveling 12.57 inches per revolution (pi X d). This is 6,283 feet per minute at 6,000 RPM. That works out to about 71 MPH (not 165). The amazing part to me is that at 6,000 RPM the pistons are going up and down 100 times per second.

Bob