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1 BAR = How Many PSI? And at what does stock S4 max?

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Old 08-17-2003, 02:43 PM
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Default 1 BAR = How Many PSI? And at what does stock S4 max?

Mine's topping out at 7.5 psi and am looking for reference points. Thinking it's EGTs since there seem to be no leaks.
Thanks.
Old 08-17-2003, 02:45 PM
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1Bar = 14.7 PSI - if your stock, that's about right.
Old 08-17-2003, 02:50 PM
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14.503774 psi
Old 08-17-2003, 03:05 PM
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Ding Ding! 1 bar NOT EQUAL to 1 ATM (14.7 psi)
Old 08-17-2003, 03:20 PM
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Default I was under the assumption that "bar" is based on....

Atmospheric pressure which is 14.7@ sealevel. 1.0 bar=14.7 psi. Or am i wrong?
Old 08-17-2003, 03:40 PM
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Default Wrong.

1 bar =

0.9869233 atm
29.52999 in Hg
100000 pascal
14.50377 PSI
750.0617 torr
Old 08-17-2003, 03:59 PM
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Default The fact that 1 bar is almost the same as 1 atm is purely coincidental.

A Bar is a metric measurement standard defined as exactly 100,000 N/m^2, and was created for it's ease of use in calculations.

An Atm is defined as the atmospheric pressure at sea level at 0 deg centigrade temperature.
Old 08-17-2003, 04:02 PM
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You want to put that on a chart too? LOL.
Old 08-17-2003, 04:22 PM
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Default maxing out at 7.5PSI in which gear?

is this a peak/hold on your gauge, or are you logging via VAG? Use at least 3rd gear to test max sustained boost, btw.

The Chart:

1 atm = 14.6959487755134 PSI
1 atm = 1.0332 kg/cm<sup>2</sup>
1 kg/cm<sup>2</sup> = 14.223 PSI
1 kg/cm<sup>2</sup> = 0.98067 bar
1 kg/cm<sup>2</sup> = 0.9678 atm
1 bar = 14.5037737730209 PSI
1 bar = 29.54 in Hg
1 bar = 0.986923266716013 atm
1 bar = 1.01972 kg/cm<sup>2</sup>
1 in Hg = 0.4912 PSI
1 in Hg = 0.03385 bar
1 PSI = 0.0689475 bar
1 PSI = 2.036 in Hg
1 PSI = 0.0680459 atm
1 PSI = 0.070308 kg/cm<sup>2</sup>
Old 08-17-2003, 07:15 PM
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Default Dang, I should have known that - and me, a degreed mechanical engineer.

My thermo must be rolling over in his grave.


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