Steady State Tuning, How Is It Done? | Inertia Vs Load Bearing Dyno [TECH NUGGET] How do you hold a constant RPM while increasing and decreasing your throttle setting in order to fine-tune your engine? This is a common question we get during the live webinar lessons that HPA broadcast via a Mainline DynoLog Dynamometers dyno, so here Andre runs us through the difference between an ‘Inertia’ and ‘Load Bearing’ style of dyno an explains how this is all possible. Want to learn more and see dyno tun