I'm still running V2 of the OTS maps, didn't like the throttle mapping when the V3 map came out. I've tuned the 2800 rpm stumble out perfectly with this map and made various other changes that make me really like it.

I never really dug into the map with ATR, just went to the tables I needed and made the changes I wanted (ie I made the throttle response of S the same as S# so I wouldn't have to twist the knob every time I got in the car). I finally started poking around in it and was looking at Boost Targets. The map notes say that peak boost is 19.5 psi. The boost target table has a max relative pressure of 1.43, which is 21 psi. Where is the 19.5 coming from?

Sorry if I'm asking a dumb question, just trying to understand.