Quote:
Originally Posted by tomm.brz
i haven t understood why OP is looking at the value if atmosferic pressure to see the boost..
Atmosferic pression is atmosferic pression and nothing else
Did the tuner say to you he relocated somehow the value of atmosferi presure to show the Manifold Relative Pressure?
Still no logs in this thread.
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He might be confused or stating things wrong. Hopefully he isn’t confusing atmospheric pressure with absolute pressure.
Atmospheric pressure should be 1 bar or 14.7 psi, or it should be less if he lives at altitude, so Reno/Tahoe might be 12.5-13 psi. A turbocharged car will still hit wastegate pressure under load, but it will just take longer at altitude, so his absolute pressure should be the same anywhere. With that said, the delta will be higher, meaning, it will take 1-1.5 more psi of turbo pressure to get to wastegate pressure because there is 1-1.5 less psi of atmospheric pressure. This would lead to more heat and less efficiency.
Hopefully he isn’t confusing atmospheric pressure and absolute pressure. Absolute pressure should be atmospheric pressure + boost pressure, so hopefully he doesn’t look at that larger number and freak out even more, thinking it is solely his boost pressure.