Hendrik
Member
Been wondering about this for a long time.
All of the following engines should produce the same "pitch" (assuming all are four stroke engines):
a single cylinder engine at 8000 revs per minute,
a two cylinder engine at 4000 revs/min,
a three cylinder engine at 2667 revs.min,
a four cylinder enine at 2000 revs/min,
a five cylinder engine at 1600 revs/min,
a six cylinder engine at 1333 revs/min, and
an eight cylinder engine at 1000 revs/min.
However, this is clearly not the case: each of these engines has a distinctive sound to it.
Could anyone explain this, please?
Does the topology and geometry of the exhaust manifold play a role?
(I know that a two cylinder engine may be an odd one, depending of the relative orientation of the throws of the crank.)
Thanks, Hendrik
All of the following engines should produce the same "pitch" (assuming all are four stroke engines):
a single cylinder engine at 8000 revs per minute,
a two cylinder engine at 4000 revs/min,
a three cylinder engine at 2667 revs.min,
a four cylinder enine at 2000 revs/min,
a five cylinder engine at 1600 revs/min,
a six cylinder engine at 1333 revs/min, and
an eight cylinder engine at 1000 revs/min.
However, this is clearly not the case: each of these engines has a distinctive sound to it.
Could anyone explain this, please?
Does the topology and geometry of the exhaust manifold play a role?
(I know that a two cylinder engine may be an odd one, depending of the relative orientation of the throws of the crank.)
Thanks, Hendrik