TurboEF9

14.7 is atmosphereic pressure, but that's not the conversion factor.. If I wanted to get "technical", the formula would be..

psi = (x * 98067) * 14.5037738

...but thanks anyway.

bobski

i guess i was thinking atmospheres and bars were the same thing

dropgear

Nah. It's because atmospheric pressure is in constant flux ... changes based upon your location, weather, altitutde, etc.

slammin86

well i figured out my problem....the belt tensioner was loose and the belt was slippin at high rpm's....now im gettin .53 bar and my boost gauge is readin over 8 psi again.....question is will the vafc hack affect the bar reading on the vafc?
is the boost gauge more accurate than the vafc?

TurboEF9

No, the V-AFC calculates boost based off of your MAP sensor. This is done on the untouched signal, so it's reading straight and accurate.

A boost gauge could have potential leaks at high pressures in the line, and could also just be "off". I know on my Autometer Ultra-Lite, my need at ambient sits about .5 psi above 0.

Now, if we think about this, this is incorrect as I am not "below" sea level. If anything, it should read a bit less if calibrated at 14.7 absolute pressure.

slammin86

hmmmm....so i might have more that .53 bar depending on where im at related to sea level?

TurboEF9

IT wouldn't change enough for you to notice with tuning only with an AFC.

..you would see it with a wideband though, due to the desity ratio.

slammin86

i have a wideband on the way....wohoo