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Old 10-03-2018, 04:22 PM   #16
tw
Read? I only know how to write.
 
Join Date: Jan 2001
Posts: 11,933
Noise increase means quality of an engine decreases. Anyone can make a loud, throaty engine. That is simply gas burning in exhaust pipes rather than in the engine. More noise means a lower performance (and higher failure rate) engine. Often an engine using obsolete technology (1960 vintage) manufacturing techniques (ie low quality milling machines).
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