Feistritzer's Hurricane coming by your left window @6500! An early 50's GMC two stroke diesel.... working.
ANY big prewar radial Aircraft.
Similar to the inline chevy six, an early Jag XK120 thru the E types. Maybe the best though is a 12 cylinder Ferrari with open headers on a race course, at night.
My Norton, or my three cylinder Triumph.
Or the absolute blood curding scream of a ten grand small block Ford in an NHRA comp class.
Last, a sound you'll never hear again, 4-1600 Hp Fairbanks Morse Submarine diesels at flank speed, again on a quiet night or the sound of a big Locomotive steam engine pulling a grade in the Alleghenies. Tim, that's what "Hair Shirts" were for.
Frank/Rebop
Bristol, In ( by Elkhart) 
