The only way to know which one is accurate, is to compare it to a
calibrated gauge. The pencil type are garbage, and your air compressor
gauge isn't designed to be that accurate. A good dial gauge is the best,
but they can get out of calibration. Digital gauges are a good all around
solution, but aren't always accurate either. I've got two myself that read
2 psi different at 30 psi.
At work we use calibrated dial tire gauges before we do any vehicle testing.
The gauges get calibrated yearly, and I've seen some go bad well before they're
due for cal.
Seth
#1544
*********** REPLY SEPARATOR ***********
On 11/1/2006 at 4:55 PM Greg Schroeder wrote:
>Now that the weather is changing it is a good time to check the air in the
>tires. I have a gauge on the device that I attach to the my air compressor
>and I have several other air pressure gauges. I thought for an experiment
>I
>would check to see what each kind read. I tried a pencil type, analog dial
>gauge, digital gauge and the one with my air compressor. To my amazement
>none
>of them were the same. Now this brings up the question. How can I tell
>which
>gauge is accurate, if any? The variance from the high to the low was
>around
>5-6 pounds.
>
>Still working on the passenger side header. Very tight fit so far. I have
>had to bend the headers at contact points to have clearance. Removed and
>reinstalled several times. Now working on clearance for the mini starter.
>
>Greg 0036
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