I'm pretty sure most everyone looks at the tach. Some guys try to say they shift off ear, but I don't see how that can even be accurate so I chalk it up to ricer talk.
idk about at the track but when im running mine hard i have to use the tach, im so used to the sounds my stang makes its just a habit to shift by sound but the bike revs so much higher it takes some restraint to keep from shifting after seven grand
