this is a great idea. i tried the hearos (they make earplugs) iphone app about a year ago, and its too sensitive, instead of giving you an average, its more instantaneous. so its fairly unusable, normal conversation is like 115, and the fuel pump pegs the meter... it might be a piece of foam over the mic would fix it, or maybe its just the free app from an earplug company!
part two is that last time at the track we learned that a cloud makes the cars louder. i have a 1st gen with a P port, and Jack has an ITS prepped FC, we're both running 3" borlas. on a normal day we both pass the 103DB sound limit, on that day with the cloud we both did 105DB
part three, is that i don't recommend the borla as a main muffler, its LOUD!
part four, what did the rotary racer say to the other rotary racer?
WHAT?