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is there a formula to calculate VE per pound of boost?
Can you expect the fuel requirements (AFR) calulations to equate to the VE increase obtained equally per pound of boost ?
You can usually follow the trend of your VE table in the normally aspirated areas. If 90 kPa and 100 kPa differ by say 3%, then you can assume a 3% increase in efficiency per 10 kPA change as a starting point.
You will of course tune this using boost control to hold the boost to the table breakpoints, and my WOT ramp runs to determine the amount of correction needed.
