Xacto
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- Jan 14, 2007
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Awhile back i was having major issues with gnarly rasp. I mean gnarly. With the Injen huge cone intake, along with DTLTs, 3 inch custom exhaust (Aero-turbine muffler) and mini magnaflow cats, the thing roared.
Just out of intuition my buddy and i decided to weld on an 18 inch straight through magnaflow resonator immediately following the y-collector (y-pipe). Rasp doesn't exist anymore. Full throttle all the way through the power band, even when cold, none.
Conclusion:
The closer you have a significant muffling device (Resonator) to the y-pipe, the better the rasp reduction. My deduction is that the rasp mostly comes from abnormal interference and overlapping wave patterns from the exhaust's combining point (y-collector). The longer it is allowed to sustain this down the pipe, the more it amplifies (amplitude of wave). If you catch it however right out of the combination state with a muffling device, it terminates the wave form.
Cheers
Just out of intuition my buddy and i decided to weld on an 18 inch straight through magnaflow resonator immediately following the y-collector (y-pipe). Rasp doesn't exist anymore. Full throttle all the way through the power band, even when cold, none.
Conclusion:
The closer you have a significant muffling device (Resonator) to the y-pipe, the better the rasp reduction. My deduction is that the rasp mostly comes from abnormal interference and overlapping wave patterns from the exhaust's combining point (y-collector). The longer it is allowed to sustain this down the pipe, the more it amplifies (amplitude of wave). If you catch it however right out of the combination state with a muffling device, it terminates the wave form.
Cheers
