MSD distributor guru

Any theories as to why engines on dynos like excessive timing and fuel for most power? Is it like find the best timing on the dyno then subtract x amount or does it change the shape of the curve more and want less or more timing in a certian area? Does this apply to both engine and chassis dynos? Does this hold pretty much true for all engine combinations or just certian combinations or applications. Thanks in advance.


It’s because they way the dyno loads the engine and the dyno controls the engine and not the other way around.