Quote:
Originally Posted by scarceller
Exactly my concern with using a single can with straight through design. The banks still mix slightly.
Seems like this mixing has undesirable effect on sound and resonance.
Not sure if completely separate mufflers will do better but I assume so. I plan to build a individual banks with 2 of these mufflers.
https://www.flowmastermufflers.com/products/exhaust/mufflers/laminar_flow_mufflers/super_hp-2_series/parts/12418409
The other concern is bigger is not always better, using 2.5" pipe after the headers I think is to large. I suspect the pipe and muffler needs to be 2" or 2.25" I think I'll be using 2.25" pipe and mufflers. |
mixing the expanded gas is a very different situation from mixing the main flow gases
Here's an older design Fabspeed that has filters out all resonance and most high frequency noise, the flow mixes after it enters the expansion chamber and so has no effect on flow efficiency
the offensive resonance depends on load but will always be present @ ~2k w/ headers tuned for max efficiency @ ~6.5 - 7k, Just as there is a peak for max resonant assisted flow there is a peak for max destructive flow .
a Helmholtz chamber is very good at filtering a specific frequency, other tuning aids are using an extended in let to the expansion chamber
the only issue w/ the 2 parallel but counter flow muffler model is that there is no internal expansion chamber to tune w/
also the larger the case the more room for expansion and absorption.
if the sides were to be merged it should look like this
Dinan also uses a well thought out absorption/Helmholtz design
and the DAnsk sport
this burns design is also nice but loud
