actually a ZERO overlap cam will make a piston engine sound like a bridgeport...just listen to a WRC car



lots of over lap along the centerline will just make the idle all lumpy and give you scores of top end..basically

there is a lot more than thast though

the cam would have to have .400 plus lift to make it sound like a bridge port too..like the little lotus twincams we do at work 1.6L 205hp......40 year old design