The Stovebolt Site Forums The Shop Area The Electrical Bay OIL GAGE QUESTION

Looking thru classic parts catalog and I see there are two different oil pressure gage ranges for 1953. One gage has a max of 30 lbs and one has a max of 60 lbs. WHY TWO ?
My 53 1/2 ton original gage has a max of 30 lbs but I am using an under the dash aftermarket gage that shows I run an average of 30 lbs of oil pressure except at idle. So wouldent my original gage be pegged to the 30 side if I wanted to use my original gage ?
Doesent the oil pressure shown on the gages depend on the size of the oil line feeding the gage ?

Your 1955 engine is a high-pressure 235, but the original 1953 truck engine was a low-pressure 216 (or, a low pressure 235 in largeer 1953 trucks). The truck 235 changed to a higher-pressure lubrication system in 1954 (see the link at the bottom of this post).

Since many trucks have "traded up" to the high-pressure 235s, there are after-market high-pressure gauges available from parts vendors.

The high vs low oil-pressure, in general, is due to differences in the oil lubrication system. The older, lower-pressure lubrication system, among other differences, had an open directed spray of oil to the rod bearings (sometimes mistakenly called a splash-oil lubrication). The high-pressure system has oil fed to the rod beatings through the crankshaft.

http://www.1954advance-design.com/Documents/EngineeringFeatures/slides/Page42.html

Thanks Tim...great information and very helpful so that I order the right parts....I learn a lot thru you guys...