Never noticed till now, but one of the pistons is pointed to intake on the 800’s and 1000’s. 650’s and 500’s have both pistons pointed to exhaust.

What’s funny is I’ve built 3 800’s and 1 1000, and put both pistons toward exhaust. They all seem to be doing fine.

Why would the piston direction be different on the 800’s and 1000’s?