bar to psi

Discussion in 'Modifications & DIY how-to' started by Goose013, May 9, 2006.

  1. Goose013

    Goose013 Member

    what is the conversion again? couldn't find it, thanks
     
  2. Weapon

    Weapon 90lbs of dynamite Supporting Member

    1 bar is equal to 14.5 psi
     
  3. rolling_trip

    rolling_trip Active Member

    1 bar = 14.50377 psi
     
  4. bluetwo

    bluetwo Active Member

    Some people say 1 Barometric = 15 PSI just because they like to round up.

    Some say 1 Barometric is only 14.5 PSI at 0 ft. or sea level.
     
  5. Goose013

    Goose013 Member

    so 1 tenth bar = 1.45 psi?
     
  6. moose

    moose Infina Mooooooose!

    1 bar = 100,000 Pascal

    1 psi = ~6894.757 Pascal

    1 bar = ~14.5 psi

    Regardless of sea level or not. The pressure certainly changes when you're not at sea level but the relationship between bar and psi does not.

    Yes, they're both linear.
     
    Last edited: May 9, 2006
  7. WrxCrazy

    WrxCrazy Active Member

    good info
     
  8. clemsonscooby

    clemsonscooby Active Member

    I actually looked at this for a while to learn relative psi conversions from bar http://www.britishmetrics.com/html/pis-bar.htm. Paste it to your dash for a couple of weeks or something and you will know the relative conversion.
     
  9. bluetwo

    bluetwo Active Member

    Ok.

    What I don't get is why my MPa gauge goes up in intervals like this: .05, .1, .15....

    I realize how the conversion works BTW, and yes I know what I'm boosting. I just don't know how it can go from .1 to .15
     
    Last edited: May 9, 2006
  10. Weapon

    Weapon 90lbs of dynamite Supporting Member

    so um...whats your question?
     
  11. bluetwo

    bluetwo Active Member

    Lol. How the heck can it go from .1 to .15

    That's like saying, ok I'm going to count to 15..... 1, 15!

    Megapascals > me.
     
  12. moose

    moose Infina Mooooooose!

    I think it probably goes .05 to .1 (.10) to .15 :)
     
  13. bluetwo

    bluetwo Active Member

    Ok sorry about the thread-jack. It's a good thing I ordered that Omori gauge. ;)
     
  14. Weapon

    Weapon 90lbs of dynamite Supporting Member

    exactly
     
  15. clemsonscooby

    clemsonscooby Active Member

    your gauge dial is messed up. It should go from .5 to 1 to 1.5 (bar), or at least thats the way my HKS mechanical works. The way you said is just plain crazy. MPa is almost the same conversion as bar, just need to multiply by 1.013 or something like that.
     
  16. moose

    moose Infina Mooooooose!

    It's in megaPascal I think he said. 100,000 Pascal = 1 bar. So .05 .10 .15 sounds reasonable.
     
  17. WrxCrazy

    WrxCrazy Active Member

    i think he is trying to ask why does the gauge do that?? .1 or .15 or whatever
     
  18. moose

    moose Infina Mooooooose!

    .1 = .10

    Think of it as .10 and maybe it gets easier. :)
     
  19. 5spdfrk

    5spdfrk Active Member

  20. bluetwo

    bluetwo Active Member


    No, it goes 0, .05, .1, .15


    And I get it now. It was the .1 to .15 that was throwing me off at first.
     
  21. sol drums

    sol drums Active Member

    .1 = 14.5 psi
     
  22. gt9729b

    gt9729b Member

    No, .1 bar is not 14.5 psi

    1 bar (no decimal before the one) is approximately 14.5 psi.
     
  23. sol drums

    sol drums Active Member

    then why is it the stock turbo gauge reads .05, .1, .15

    and my car hits peak boost at 18.5psi and on my gauge that reads between .1 & .15

    so .1 mpa = 14.5 ????

    and .1 mpa = 1 bar ???
     
    Last edited: May 10, 2006
  24. gt9729b

    gt9729b Member

    From www.onlineconversion.com

    1 megapascal = 145.037 738 007 pound/square inch [absolute]

    So, your reading of .1 to .15 is between (approximately) 15 and 22 psi. So, that sounds about right for your gauge.
     
  25. moose

    moose Infina Mooooooose!

    I posted earlier that 100,000 Pascal = 1 bar, so yes.
     
  26. sol drums

    sol drums Active Member

    okay, that makes sense. thanks guys
     
  27. Weapon

    Weapon 90lbs of dynamite Supporting Member

    lol this thread is still going?
     
  28. sol drums

    sol drums Active Member

    yea, leave it to me

    got to get my post counts in
     
  29. bluetwo

    bluetwo Active Member

    It's funny. But before this thread I had never heard anyone say 14.5

    It's always been 14.7 from everything I've read or heard.
     
  30. flip

    flip Member

    Wow, very usefull info. I've always wondered about my gauge but hadn't ever asked... Good to know!!!
     
  31. moose

    moose Infina Mooooooose!

    14.7 is considered standard atmospheric pressure. No clue why bar and atmospheric pressure have been considered equal other than that they both represent pressure and are rather close to each other in value. :)
     
  32. mmtasty

    mmtasty Active Member

    ooooouch... my head hurts now. I thought I knew, but now I'm not sure anymore. :eek3:
     
  33. ScoobyMike

    ScoobyMike OG Mod

    haha, I had the same problem once....you'll get it
     

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