Funny, Mine is very loud at startup also. But my neighbors are car lovers!
One day I got a call from my wife on my way to work and thought what did I forget? I was about 1.5 miles away from our house and she said what are you doing? I said going to work. She said it sounds like your racing, I can hear you! I said oh yeah a mustang tried to pass me and I couldn't resist?
LOL