does nyone know of any gauges with both psi and kg/cm^2? (ive looked around the forum but couldnt find)

 

woops. any TURBO gauges with both psi n kg/cm^2

 

... buy a calculator?

Pressure Equivalents
1 lb per square inch (PSI) = 6.9 kilopascal (kPa)
1 PSI = 2.31 feet head of water

Anyhow, what do our metric buddies measure in? Is it still water? Because kg/sq cm H20 seems a bit tall, but kg/sq cm Hg seems a bit more reasonable...

If you live in america, just buy a PSI guage, because you won't know what the hell kg/sq cm Hg is until take college chem. And until then, none of you friends will know what kg/sq cm Hg, (or for that matter kg/sq cm H2O) means.

On the other hand, if you're in an imperial/metric standard contry... why the hell would you even consider a system more confusing??

 

Oh.. and if they do measure pressure (wich I think would be KPa in metric... ) in kg/sq cm H20 (which I think would be kg/sq cm Hg, kg mercury per square centimeter) than you would also need
Length Equivalents
centimeter (cm) = 0.3937 inch = 0.01 m = 0.03281 ft.
Soo...

The corrected equation would be

PSI =[ Kg/(cm^2)H20 ]*X
Where X = 0.4538/2.54

OR X= .178

So that
PSI(H2O)*.178=kg/cm^2 H2O

 

I understand bar perfectly. Which is kg/cm2 anyways, and yes I took college chem . Anything over .8 bar a stock turbo is bad. 1bar on a stock turbo is engine blowing territory.

1bar = about 14.7psi if memory serves.

 

14.7 yeah... so you really looking for a pressure gauge that has both? I dunno... i guess your best bet might just be to look everywhere and hope that a gauge will.

 

I've never seen one with both standard and metric. Basically any american made gauge is going to be standard (autometer etc), and japanese made meter will be metric (greddy, hks, apexi etc).

Metric should really be "standard" anyways, it makes so much more sense. 1kilometer =1000 meters.... 1mile = 5280 ft... wtf? water.... freezes at 0c, boils at 100c..... 32f and 212f... again wtf??? haha, too bad the US will never switch. End of switch to metric rant.

 

"Anyhow, what do our metric buddies measure in? Is it still water? Because kg/sq cm H20 seems a bit tall, but kg/sq cm Hg seems a bit more reasonable..."


Actually the measurement is "mm of Hg" or "Inches of H2O" not Kg/cm^2 of Hg or lb/in^2 water.

Rob

 

yeah metric is sooo much easier to deal with...everything is in multiples of 10...but to answer your post, i don't know about a guage with multiple scales on it. btw, im taking instrumentation right now in college in canada, yes were metric, and here are some conversions:
1 psi
=6.895 kPa
=27.7" water
=2.04" mercury
=51.7 mm mercury

and 1 bar is slightly less than atmospheric pressure (14.511 psi)

 

The Japanese seem hung up on kg/cm2, which is not a true metric measure of pressure. Personally I think any measure that requires you use a decimal point all the time is the wrong one for the situation, and that includes bar. kPa (kilopascal) is a much more appropriate metric measurement for turbo boost. 100kPa = 1bar or 14.5psi. So stock boost is 45kPa (S4) or 55kPa (S5), and 70kPa is safe boost on the stock turbo. See how nice that is?

 

1 bar = 100kPa = ~14.5psi
1.0 kg/cm^2 = ~14.2psi
So be careful - it's off by a little.
Omori does make boost gauges that read in psi.


-Ted