I'll add that not too much energy is needed to produce a loud noise, even really loud. Take a normal car stereo: you have two to four speakers, 25W-80W each, and at max you can't listen to it, unless you're a teenager. You can hear the thumping from teens' cars from hundreds of yards away, while only 100W-300W are going into making the noise (at that level it's not music anymore, whatever it is). That's only a fraction of 1hp, so no detectable difference in FE.
As was stated earlier, the FE gains come from relieving backpressure, not reducing/making more noise.
__________________
e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread
|