@nanoload If the slaving function fails, you will still need to slew the heading card to match the liquid compass (using the lower switch). By the way, adjusting the heading to match is not "calibration". Calibration refers to adjustment of the HSI system to meet factory specifications on a bench...
I will keep the IO-360 in my 172. Automobile engines, even a Corvette, are simply not designed for the continuous high power operation of aircraft engines. Can you even get an insurance company to cover the aircraft (now relicensed in the Experimental category) when you install that engine?
@wa2ise - I will hire the person who survived the school at which "they tried everything they could do to make you fail" first. That is why Stevens people are heads over heels above most others.
@nanoload If the slaving function fails, you will still need to slew the heading card to match the liquid compass (using the lower switch). By the way, adjusting the heading to match is not "calibration". Calibration refers to adjustment of the HSI system to meet factory specifications on a bench...