Quote Originally Posted by Mike52 View Post
Dave, that's great info, thanks. I'm just as interested in the sound levels too, it's a shame they don't have the decibel numbers to go along with the flow numbers. I'll be using 2½" pipes for my Deuce but I don't want mufflers that are too loud, just a nice rumble.

Mike
Well, unfortunately the guy who did all the flow testing is a lot like me....Flow counts and the decibals don't... However, did get a notice today that some of the cicle burner tracks are going to be requiring mufflers to reduce the sound levels a bit on race cars this year, though they aren't talking any big reductions.... Guess we're going to have a sound cop at the drags for test and tune so if you want to know what your car's exhaust puts out, you can find out.... Think I might try the Vortex cones in the collectors on the 'maro, supposed to cut about 10db or so...

Checking out all the mufflers for decibals would be kewl though....Would be interesting to set up some parameters and test a few different mufflers... We did test some exhaust and a few different mufflers on the chassis dyno for hp and torque a number of years back...maybe we could check for loudness in the same manner????????