As a professional film camera man for motorsports during the sixties and seventies I was privileged to be close to the action. In 1967 I was in San Diego filming the Chrysler Crew as it was firing up. The ringing scream of those two Keith Black Marine engines was ear splitting. As it pulled away the noise was positively shattering! I haven't seen any other comments on the sound of this machine but from dragsters to Indianapolis or Nascar, Nothing came close.