P-39 RPM indicator: Is this correct?

[69th_Mobile_BBQ]

Setting the in-cockpit RPM lever to the 2600 RPM marker only shows ~2550 on the RPM dial on the dashboard when the manifold pressure is set to 37.2 (nominal according to the in-game specifications).   Is this correct or does outside air pressure and ambient temperature also factor in.  The only other thing I can think is that I had the mixture set to Auto Rich.  After watching Requiem's tutorial he stated that Auto Lean was the proper cruise setting.  Would this make the difference?  

[gimpy117]

im confused what you are asking? is the simulated prop governor 50 rpm off or the manifold not showing right? 

 

in my experience a 50 rpm low on a prop governor isn't too bad. the devs should go in though and give that governor 2 turns and bump the limit up ?