Quote:
Originally posted by tw
Now take the exhaust systems off of all engines. Now apply different engines to the same open exhaust technologies. Notice which engines make less noise AND have higher performance per liter. Less exhaust noise indicates a higher performance engine.
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Nope, it ain't that simple. Removing the exhaust system changes the way the engine works. Not just the amount of restriction (which leads to backpressure), but the geometry of the system. Taking it off leads to a wholly invalid measurement. Not to mention a very loud car.