Ive been reading up on this topic and have read the old threads. What i am still wondering is how do you "guesstimate" your boost level at a given rpm ?

i know my PR and my CFM n/a as well as cfm lb/min for my given rpm targets but as it stands when i try to plot on the graph it is always 2.46 but you cant have full boost at idle for example.

so if my target rpm points are 1000rpm , 3000rpm , 45000rpm and 8200rpm what should i use as boost levels for those points as a guesstimate?

thanks