An update. I installed an I could get was 0-100 PSI but it is a wide sweep so the notches are far enough apart to read easily.
When I first started it up it took a second or two to get a reading. The capillary tube is almost clear and I could see the oil coming through. It was empty up till then obviously.
The increments read 0 - I - 25 - I - 50 etc. I figure the notches between the numbers are about 1/2 of the PSI. So the first would be 12.5 more or less.
With operating temps normal and driving 30 mph in 3rd gear I was reading just above the 25, quite near the notch (37.5?). It never got higher than that.
When I slowed down and stopped sometimes it would be below 25, closer to the 12.5 notch. It never went below that.
Similarly so when I geared down to second to go around a corner the pressure dropped.
As an after thought I dug out my 49 Chevy owners manual. It is set up for a 216 with the gauge reading 0-15-30. To quote it says that 15 is normal when driving and if the oil is thin and the operating conditions are warm, the needle will drop below 15 at a slower engine speed. At the same time if the oil is thick and the temperature is cold it can be normal for the needle to as high as 30.
So that is where I stand and further comments, suggestions or words of encouragement would be appreciated. And I also figure that my old gauge was fairly accurate.
Bill
