View Single Post
  #45  
Old 03-10-2013, 02:11 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by JimLev View Post
KTMP Reading/PSI Reading
Technical question... (physics I guess). I never understood gauge pressure variants.

I was trying to convert JimLev's numbers to 'bar' to see how they related to the 1.2 bar cap versus the 2 bar cap ... when I realized there are TWO separate psi-to-bar conversions (depending on test conditions and gauge used):
  • Differential pressure, where 1 bar = 14.5037738007 psi
  • Gauge pressure, where 1 bar =-0.1921755993000005 psi (absolute)
I'm assuming the former rather than the latter, in expanding the JimLev table below in order to see the temperature relationship to pressure in bar units:
  • 40C = 1.5 PSI = 0.10 bar
  • 45C = 2 PSI = 0.14 bar
  • 50C = 2.25 PSI = 0.16 bar
  • 55C = 2.5 PSI = 0.17 bar
  • 60C = 3.0 PSI = 0.21 bar
  • 65C = 3.25 PSI = 0.22 bar
  • 70C = 3.5 PSI = 0.24 bar
  • 75C = 4.0 PSI = 0.28 bar
  • 80C = 5 PSI = 0.35 bar
  • 85C = 6 PSI = 0.41 bar
  • 90C = 6.5 PSI = 0.45 bar
  • 95C = 7.5 PSI = 0.52 bar
  • 100C = 9.0 PSI = 0.62 bar
  • 105C = 16.5 PSI = 1.14 bar
__________________
Please read the suggested threads and add value, either by pictures or by descriptions, so the next person stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 03-26-2013 at 08:17 AM.
Reply With Quote