Quote:
Originally Posted by stonebreaker
Since we're talking about a gas, it will always expand to fill the available space.
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And as it expands, it cools, and as it cools, it slows, and as it slows, it creates a stacking effect, increasing pumping losses in the engine.
For mufflers, PVC is acoustically inert, and with properly placed dimples, could be tuned so that sonic frequencies cancel themselves by reflection without compromising flow. Of course, nobody wants a plastic muffler, cuz "it could melt".
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