Quote Originally Posted by 1168 View Post
funny you should mention that. I’m a bit of a motorcycle racing muffler nerd, and have done a lot of races that have db metering as part of tech inspection. I also had a tendency to want a quieter bike during long and tiring races, for a variety of reasons, including a competitive psychological advantage. There’s a huge amount of overlap in mufflers for engines and those for guns. As a general rule, less backpressure=louder, but it’s not always true. And reducing backpressure can have diminishing returns, much like going quieter can have.
This one rule that all AHRMA racers hate.......