I finally got round to doing a software release to support AGU engines. I calculate the boost pressure this way, boost = ((MAF x 53.5)/RPM) - 1 It seems to be pretty accurate when tested on my BAM engine comparing the real MAP with the calculated values. The pictures below show two similar 4th gear runs from off throttle at 40mph the WOT for about 4 or 5 seconds, the top picture is a plot of the calculated boost, the picture below is an almost identical run showing the actual bost. Using the calculated method gives addition vaccum information not available from the MAP sensor as it is before the throttle plate. The video below shows it in use using the "agu calculated metod".