Just curious, as I seem to have about 0.1 less bar today sustained boost at low 90's F compared with low 70's F yesterday evening.

 

I am not aware of a specific table of correction factors...for one reason no one actually agrees on what the correction factor(s) should be or what it should be for a turbo. There is no "standard" for calculating accuracy, so correction factors will be estimates of what someone thinks will be the effect (numerically expressed). Suffice it to say, you will not have as much power with higher temps, higher humidity or higher altitude...

 

There are tables in the ecu that correct boost (load) based on tempature factors.

Many tuners set these tables flat, so there is no correction. If I have a minute tomorrow, I will see it I can screen shot one or two of them...

 

Thanks Statman and Nerdhotrod for the info.

Is the amount of boost displayed on the in-dash gauge a true/absolute measure of bar/PSI, or is it measured relative to the atmospheric pressure? Would a boost gauge reading of 1 bar at 5,000ft above sea level be the same as 1 bar at sea level?