M1 Anti Lag question

The "Engine Speed Limit" selection in the Anti Lag setup is confusing to me. the help file says that its the rpm limit used when the antilag state is NOT enabled, what is the purpose of this??

Bob

It helps to control the engine speed when the Anti Lag system is not doing so, this is especially useful on cable throttle engine where the throttle plate may be restricted from fully closing and thus dragging the engine speed down.