Quote:
Originally Posted by CobraV8
So your car is emitting it's exhaust sound off the engine block rather than out of the tailpipe?
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Both. Otherwise, a small block aluminum 427CID engine with the same compression ratio, horsepower, and timing events would send out exactly the same vibrations as an iron block FE (which they don't). An aluminum bell, with exactly the same
cavity size as a larger iron bell, will sound completely different even when struck with the same hammer using exactly the same force.