How is the engine and test cell exhaust system configured during a
dynamometer run?

I'd guess that the engine is using something like 2 in diameter by 25
inch long pipes, but then what?  A square edge transition into 4 or 6
inch flex pipe and then into a monster muffler?  Setting up the muffling
system so it produces minimal interaction with the engine exhaust pipes
has to be quite a challenge.

Thanks,

Philip

Here are some picts.

Our man Dyno Dave Lemon owner of Mazdatrix qualified on the pole
in SCCA E-Production in Phoenix driving his second gen RX7
convertible today.