I'm finishing off a 1980s Wolfgang Matt Joker, which I'm powering with an MVVS90, and for the first time I'm going for a tuned pipe to keep it in period style. I've got a Genesis 90 size quiet pipe, and I'll be trying 14*8 and 15*8 APC props to start with, so I'm expecting around 9500rpm.
So the questions are - how long should the pipe be, and does it matter if I leave it overlength? I certainly don't expect the model to be underpowered, so I'm really after a clean throttle response and low noise levels.
Any hints and tips?
Bob