Dyno questions and associated ramblings

[GTRFAN]

Hi,

Do most of the dyno operators in the US have twin O2 sensors for the twin Z exhaust pipes? The reason I ask is that when we ran on a local dyno dynamics they only had the one O2 sensor and couldn't take a accurate A/F measurement.

They also said their dyno operates real world mode with temperature and barometric pressure recorded and entered before each run. My understanding is that this gives the most accurate results and is opposite to "Shootout Mode" which they laughed at as a common practice to get higher power figures.

Just curious more than anything

thanks