Quote:
Originally Posted by cnc
I'm thinking about exhaust pulses - waves.. It coud be similar or the same to the tricks in audio transmission lines. If I'm right, briefly there is a need to avoid stationary waves.
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That is very much how exhaust works, if you have a back pressure gauge the gauge should be reading in the 0-2psi range depending on how clean the bends in your exhaust are and how much soot and so on is causing roughness, going with larger pipe will not lower that 0-2psi number without causing distortion (fart can rumble) and stationary waves.
If you were to take the volume of exhaust gasses and push those as a steady stream without pulses then yes larger would be better, the vanes of a turbo tend to smooth those pulses out a bit, absorbing a fair amount of sound as well.