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geddes66 · Joined: 10 May 2003 Posts: 129 Location: Bakersfield CA

Ok< I saw the post that 1 bar is 14.503 PSI. is a kpa/cm2 another name for a bar or is it totally different? If so what is it in PSI? I am guessing it is about 10 PSI. this is for oil pressure guages and peace of mind.
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The Porsche is now my son's, my car is cooler, slower but cooler.

Smoothie · Posted: Tue Nov 04, 2003 1:00 am Post subject:

Don't know about a kpa/cm2, but an at(kp/cm2) = 0.981 x bar (according to the online converter in my next post) or an at(kp/cm2) x 0.981 = bar (according to the way the tech specs booklet states it).

"at(kp/cm2)" is called a "technical atmosphere".
"kpa" is a kilopascal. Don't know what just "kp" means, maybe the same thing.
Where did you see "kpa/cm2"?
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

924 turbo · Posted: Tue Nov 04, 2003 1:03 am Post subject:

http://members.rennlist.com/pirtle/s4specs.htm

http://www.matheson-trigas.com/mathportal/_pdfs/products/Conversion%20Tables.pdf

According to this information, 1 kp/cm2 would be equal to approximately 14.78 psi.

kp is kilopond, kPa is kilopascals. Some of the oil pressure gauges are marked in kiloponds per square centimeter.
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Jon Furst

Smoothie · Posted: Tue Nov 04, 2003 1:27 am Post subject:

More junk on that:
1 technical atmosphere (kp/cm2) is 14.223psi. (according to the online converter below)
A "kp" is a "kilopond", "kpa" is still a "kilopascal".
Online converter - http://www.geoforum.com/knowledge/unit/pressure.asp
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Smoothie · Posted: Tue Nov 04, 2003 2:11 am Post subject:

Hey, screw the online converter. I played with it some more - apparently it's buggy and it also rounds the values you enter. I'm inclined to think the Porsche tech specs booklet and the other stuff from 924Turbo is correct as in kp/cm2 x 0.981 = bar, so 1 kp/cm2 = 14.78 psi.
Obviously, that still doesn't answer the question, "What is kpa/cm2 equal to?".

Later...
Here's something that suggests 2.3 kpa/cm2 equals 35psi (see the first search result): <click> Yahoo search on kpa/cm2 That would make 1 kpa/cm2 approximately equal to 15.22psi, so both kpa/cm2 and kp/cm2 are probably close enough to a bar for the purpose of reading an oil pressure gauge.
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Ordrune · Joined: 29 Nov 2002 Posts: 40 Location: Sydney, Australia

My conversion tables here are saying that.....
1 bar =100 kpa
1 kpa =0.145 psi
1 psi = 6.89 kpa

As far as I know(I could be totally wrong) Kpa is always calculated to Cm2 (kpa/cm2) unless otherwise stated.
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'79 924 supercharged,intercooled

Neil924 · Joined: 18 Mar 2003 Posts: 4225 Location: Canada

geddes66 · Joined: 10 May 2003 Posts: 129 Location: Bakersfield CA

OOPS! my bad. I meant kp/cm2 not kpa. So my small gear head will go with about 15 for every 1 on the guage. So 4 is about 59 psi. A safe oil press at 3000 rpm. (figuring all those decimal points is a good way to miss a curve.)

Thanks all.
_________________
The Porsche is now my son's, my car is cooler, slower but cooler.