Quote Originally Posted by Geezer2 View Post
Gotta love that sound.

My guess, it's idling at about 300 RPM??
I've got the twin setup to this in my '30 roadster, both engines built by Vern Tardel. Mine has pretty much the same idle characteristic and shows 700 rpm on my tach. The exhaust note at revs is slightly different than mine, but that could either be attributed to the piping differences or sound reproduction on the computer.