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.
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.
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.
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
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.
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.
I downloaded this conversion table a while ago. I use it alot. http://joshmadison.net/software/convert/
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.
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 ???
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.
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.
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.