HP Tuners MAP calculations

[16GoManGoHC2]

See 3 videos attached. Back when I was running a 3.8 Whipple I thought I was making 24-25 psi of boost. Forum member @fumanchu182 pointed out boost based on PR was more like 29-30 psi of boost so I hooked up a calibrated liquid filled gauge to the blower lid snd sure enough he was correct, see video of HP T verses actual boost gauge.
So now I’m testing a 2.7 IHI blower with my custom billet oil lubed front plate and same HP Tuners log channels file is telling me MAP is around 24 psi but PR of 2.75-2.80 is saying MAP is more like 25-26 psi at 14.5 Baro. I’m going to hook up same liquid filled gauge to the blower lid again and measure actual next run but how do I get HP T to calculate and display MAP correctly based on PR and Baro pressure?

3.8 Whipple

3.8 Whipple 60-130 log portion

si=kHBqi3FhJ9ZwcuNs

2.7 IHI 60-130 Log portion

Anyone know?

 

[fumanchu182]

Sensed map seems to be the most accurate. @Jon-MooredPerformanceLLC cam confirm.

 

[Speedy!]

On my 170 I log MAP, Sensed MAP, Pressure Ratio, Aircharge, and have a custom PID called "BOOST" in chart data. I also log Barometric pressure as it's needed to calculate actual pressure in most cases. They're all with in 1psi.

I think @fumanchu182 gave me a tip on setting up the "BOOST" PID since it's custom and actually reads one of the MAP sensors (from memory) and subtracts BARO from it.

Could it be something with the MAP sensor scale?

 

[Jon-MooredPerformanceLLC]

Problem is sae channels will not read over 37psi. Sensed map is not an sae thing parameter.