Quote:
Originally Posted by Msmall143
I don't think this is correct,
Open = both are open, however the majority goes out the outside pipe because its the path of least resistance
Closed = outside pipe is closed.
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Yes I simplified but I am assuming the outside tip path does not create enough back pressure to push any flow through the muffler.
Edit: it might be interesting to see how fast the valve opens. If it is gradual then both paths could be used during the transition.