Standard atmospheric pressure if I remember right is about 1012 millibars or 1.012 bars which is 14.xx psi(don't remember the decimal points). If his compression measurement was 9 it would likely be 9 bars or about 130 psi. Does that sound about right?
edit: After posting this I just had to go look it up. Standard atmosphere is 1013.25 mb or 14.696 psi giving just over 130 psi for 9 bars.
Last edited by Sam Welch; 06/18/13 09:11 AM.
