Originally Posted by
Cbfn1
I took the pipe off the plane today.looked inside and it has what looks to be a washer welded or glued 9 inches back from the front of the pipe.looking through the washer I can see one more with an offset hole around 4inches further back.
I want to measure to the first washer or baffle that is at 9 inches right?
I cannot see through the pipe.
Im waiting for the 11/7 and 11/8 props to arrive.
9" is your reference measurement. Add to that the header length from the exhaust port. Follow the curve of the header. The total length should be 14" for the 11/8 and 11/7. You might get more performance from a shorter length but the length noted should get you in the ball park.