I have long wondered why a V8 exhaust sounds so different from our V6's.

A crossfire SRT6 has a bore and stroke of 89.9x84, about .53 liters per piston. A mustang 5 liter 2013 B&S is 92x92, which is .625 liters per piston. In my view that is not a big difference.

Accounting for engine dispacement, a 3.2L is pumping as much volume at 3100 rpm as a 5 liter is at 2000 rpm.

Accounting for exhaust impulses out the tailpipe, a 6 cyl has 3 per revolution. 1500 rpm would be 4500 exhaust impulses per minute.
A V8 has 4 per revolution, so 4500 exhaust notes would come at 1125 rpm.

Do these factors come into play in the final sound of the engine? Will the proper exhaust components make a Xfire sound like a Mustang GT?


And on a related topic, why dont we get the burble and popping sound when downshifting the autostick that you get when you downshift a proper stickshift?