I will post the link to this video later (in about 2 hrs 9pm west coast). It's loading right now and I have something else to do.
This run was made with no muffler.
Back pressure came in at 2 psi.
That's almost half of the 3 3/4 psi from the last run with a muffler.
CO

Here ya go: https://www.youtube.com/watch?v=-mPiuWMOw6U
CO