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      07-31-2013, 01:53 PM   #115
BMW269
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Quote:
Originally Posted by bradleyland View Post
That's easier to do by ear than it is through frequency analysis because of the difference in character between a cross-plane V8 and an I6. A cross-plan V8 has a "double" combustion event on each side as it works through the firing order. Scroll down to the "Chevy V8 Firing Order" graphic on this page to see what I mean:

http://craig.backfire.ca/pages/autos/v8-engines#firing

For a given RPM, a V8 will have a higher sound frequency, because it has more combustion events per revolution, so if you know the RPM, it's trivially easy to determine the number of cylinders through frequency analysis.
I meant V6, not V8.
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