Quote:
Originally Posted by madmac
what do you figure the baffles are doing?? as far as droning is concerned?
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I would speculate they are causing a restriction, which encourages less high sound pressure pulse to get out through the exhaust tips, and more of that sound energy to instead get sent across the crossover pipe (which *is* present in the GHL exhaust) so it can travel back up the other 3-cylinder bank exhaust pipe, so that the rarefaction phase of this pulse effectively cancel out the positive pulse of the exhaust gasses escaping out past the valves of the opposite cylinder bank, at the "droning" (1st order harmonic) frequency.
Would the added restriction also rob horsepower, though, and defeat the purpose of having an aftermarket "straight through" exhaust system in the first place? In the absence of having dyno data to review, I would also speculate "yes."