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| | | | Joined: Dec 2018 Posts: 22 'Bolter | | 'Bolter Joined: Dec 2018 Posts: 22 | Trying to verify the correct gauges as far as speedometer, 80 or 90, and oil pressure, 30 or 60. I thought I read it somewhere on here but can’t seem to find it. Not sure if it matters but this is for a 1 ton truck | | | | | Joined: May 2001 Posts: 1,904 'Bolter | | 'Bolter Joined: May 2001 Posts: 1,904 | Do you have the stock tires and rear end? I don't so I've gone through a neighborhood speed measurement device and have recalibrated in my mind.
I don't think you need to recalibrate oil pressure.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
| | | | | Joined: Mar 2005 Posts: 155 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 155 | The 1950 speedometer should read 80mph. (90mph speedometer is introduced in 1952 half-ton) Oil pressure gauge should read max 30 for all 216 and babbitt 235 engines - which your truck originally would have had. | | | | | Joined: Dec 2018 Posts: 22 'Bolter | | 'Bolter Joined: Dec 2018 Posts: 22 | I was told the engine that is in it came out of a 54. Does that mean I will need the oil gauge that reads 60 psi to work correctly? | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | | | | | | Joined: Mar 2010 Posts: 10,279 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,279 | If the gauge cluster is currently out of the dash, it would be easy enough to swap in a 60# gauge into the cluster. If it is still in the dash, I wouldn't bother taking out the cluster just to switch to the 60# gauge.
The 30# gauge will work just fine with a '54 engine. It will peg the needle on 30# while driving, and somewhere below 30# at idle when fully warmed up. I am more concerned about the low end range of oil pressure rather than the high end, so I stayed with the 30# gauge on my '49 with a 350 in it.
Pegging the 30# pound gauge will not harm the gauge whatsoever.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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