In article ,
Sylvain VAN DER WALDE wrote:
However, tuning the exhaust system gives lesser results in comparison
with the effects of tuning the input system (by quite a lot)

I believe that 2 stroke (racing?) engines were greatly improved (over a
narrow revolutions band) by tuning the exhaust.

You can tune an exhaust to resonate at certain frequencies. This then
produces an extractor effect. Useful on racing engines with a narrow power
band, but not so much so on a road engine. The same effect is also used on
inlet tracts.

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*I'm not your type. I'm not inflatable.

Dave Plowman London SW
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