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      08-16-2022, 04:38 PM   #43
itoto
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Drives: E90 M3
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2009 BMW E90 M3  [0.00]
Quote:
Originally Posted by s0ldats View Post
Quote:
Originally Posted by 911r View Post
I've heard an x-pipe similar to this (forward x, no resonators) paired with an Akra and it was absolute perfection. Generally mufflers control rasp more efficiently and resonators are there for tonal control. Resonators function by altering the frequency of the pressure wave, and do not simply cancel out or mitigate rasp (although it is possible). Pretty common misconception.
in theory would adding resonators to this setup increase or decrease the pitch? or would that depend on the resonator used?

planning to run it w/ an oem rear section until i can find a ti akra rear
Generally, decrease. Mufflers and resonators, in general, both do the same thing; transfer energy from the sound waves to insulation of the resonator and mufflers, preventing the propagation of a variety of frequencies. Although possible, increasing the overall frequency of the waves in a refined manner will require something more complex than a hollow object with insulation; it'll require at the minimum dead-end tubing and a knowledge of how our car's exhaust functions, something universal resonators/mufflers don't generally take into consideration.
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