Alternative-Sock-444 t1_ja4p719 wrote
Reply to comment by bal00 in Eli5 why certain internal combustion engines (like those on American muscle cars) make wildly different sounds than most other engines? by Daftworks
That's 90% of the sound difference. The rest comes down to cylinder head design, camshaft lobe shape/timing, and the obvious one, exhaust. Which is why two different flat plane engines, with the same displacement, even with identical exhausts, will still sound very different. But cross vs flat plane is definitely the biggest defining factor.
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