Quote:
Originally Posted by JIM THEO
Once I commented here that ACE longtube 4>2>1 headers, due to very good scavenging, are less noisy than other headers and been told is non relative... although I know sound and gases travel the same way, that's why a saxophone sounds completely different in ice cold winters than in hot summers!
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Lengths of the internal standing waves are shorter in the cold. ...and longer at high altitude.