Cylinder head temperature gauge |
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Cylinder head temperature gauge |
Geezer914 |
Jan 13 2021, 03:53 PM
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#1
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Geezer914 Group: Members Posts: 1,393 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States |
VDO no longer makes them, any other gauges out there?
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FlacaProductions |
Jan 14 2021, 09:07 PM
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#2
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Senior Member Group: Members Posts: 1,570 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California |
as i understand it - and i could be wrong - non-temperature compensated gauges will read out higher as the ambient temperature goes up and lower as it goes down. ie: if your engine temp is (for example) 250 at 72 degrees, a non-compensated display will show 260 at 82.
temp-compensated will show 250 no matter the ambient temp. |
barefoot |
Jan 15 2021, 10:06 AM
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#3
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Senior Member Group: Members Posts: 1,271 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States |
as i understand it - and i could be wrong - non-temperature compensated gauges will read out higher as the ambient temperature goes up and lower as it goes down. ie: if your engine temp is (for example) 250 at 72 degrees, a non-compensated display will show 260 at 82. temp-compensated will show 250 no matter the ambient temp. Not true, sorry. Thermocouple based cylinder head temperature gauges use a bimetal construction that generates a voltage if one end is heated (or cooled). Thermocoulpes will measure the temperature DIFFERENCE between the hot end and the other end. Cold junction compensation introduces a measurement at the cold end then does an addition to read the actual temperature at the hot end, not just the difference. i verified mine by placing the hot end in ~ boiling water as a bench test and got 210 degrees. Cooled to room temperature and the gauge read 73, so i know I'm reading actual head temps. Hope this helps |
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