Quote:
Originally Posted by bobby35ny
All the clips I'm hearing with full catbacks with xpipes sound raspy as hell to me.
=bobby
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Listen to this one; it's the Borla and my favorite so far:
http://www.camaro5.com/forums/showthread.php?t=33283
Based on this and the other Borla clips I've heard I think this is the one I'll be getting.
The reason why a crossover sounds "raspy" compared to the H pipe is due to the odd pulses crossing over to the side they did not come from originally and squeezing inbetween the pulse pattern that is coming from that side. They change the sound because the stream of pulses have a harmonic pattern that gets changed when a "note" is pushed into the stream that is out of time with the firing pattern for that side. This is what gives the exhaust sound that raspy or ratty tone.
An H pipe actually serves more as a pressure equalizer between the 2 sides rather than directing pulses from one side to the other like a crossover does. With an H pipe you're hearing the natural patterned tone coming from each side with far fewer odd pulses which is why it has less raspiness.
The H pipe equalizes the pressure between the 2 sides but has more back pressure. A crossover actively works to move the pulses through the exhaust system easier so it produces less back pressure and slightly more power than an H pipe. Borla has figured out how to make a crossover sound fantastic.
