MELBOURNE, Australia — Formula 1's new sound has got the thumbs-down from a few big names in motorsport.The switch to V6 turbo engines may suit automakers but some observers believe they've stripped away the sport's "powerful sound".'LOOKING SLOW AND UGLY'Indy Car driver Will Power tweeted during Friday's (March 14) practice for the season-opening Australian GP that he was "missing the scream of the old F1 cars". Team owner and ex-Cart champion Jimmy Vasser said the cars were "looking slow and ugly and that sound..."Nascar's Michael McDowell wondered: "Maybe TV is not doing them justice. Are they even shifting?"Even F1 drivers were unhappy. After an Australian Air Force fighter jet flew over the track on March 14, Marussia driver Max Chilton said: "Finally some noise returns to the F1 paddock."Stay with Wheels24 for the first 2014 F1 race in Australia this weekend.