chadihman
Addicted to ArboristSite
Good idea! I'll hook in a back pressure gauge.Can you hookup a pressure sensor to monitor backpressure? Location of muffler port may make difference if in front or on side in rear, not just shear are, and then affect escape of exhaust and escape and reflection back of charge, of course depends on port angles/size/engine design that the 461 may be optimized for. I would trust the builders gut feelings here, you could read Gordon Jennings tuning 2cycle book 20 times but theory will only go so far with so many factors involved.