At what density altitude was that measured? Maybe your MAP needs to be calibrated. Brian Trubee -----Original Message----- From: coastiefamily4 <coastiefamily4@gmail.com> To: Rotary motors in aircraft <flyrotary@lancaironline.net> Sent: Sat, Sep 3, 2011 1:50 pm Subject: [FlyRotary] 20B Tuning My static MAP before starting the engine was 23.3