BoostEst estimates “boost” from airflow per rev. On a properly configured car, this value should match measured manifold pressure pretty closely at wide open throttle around 5500-6500 RPM. Outside this range, BoostEst is expected to fall off from measured. The BoostEst calculation is not calibrated to read accurately at any other engine speed (RPM).
http://www.ecmtuning.com/wiki/ecmlin...cks?s=boostest