A while ago I went for a ride in my friends s14 w/ t28. He had defi gauges and his boost gauge was measured in BAR. So I was trying to figure out Bar-psi.
-Any ways I was searching and came across this.. its so usefull, you can use it for just about any type of measurement.
http://joshmadison.com/software/convert/
Hope some people will find it as useful as I did.