strad wrote: ↑
Fri Jun 08, 2018 1:37 am
Thanks but I know that now. It's just that for most of my life I thought 1 BAR was
1 atmospheric pressure. wasn't till a few years ago that my mis-conception was pointed out to me.
Came up when I was talking with someone about how my supercharged cars pounds of boost compared with other machines that measure the boost in BARs.
Of course 1bar = 100kPa, and standard atmospheric pressure is 101.325kPa.
And 1 atmosphere (atm) = 101.325kPa
And it can be further confused - the pressure can be boost (pressure above standard or ambient pressure, depending on definition*) or Manifold Absolute Pressure (MAP).
The 1988 turbos were constrained to 2.5bar MAP, which is 1.5bar boost at sea level.
*In WW2 the British used boost, defined as pressure above the standard sea level air pressure (14.7psi). The Americans used MAP, measured in inHg. The Germans used Ata, which was a technical atmosphere
absolute (ie not boost)