06-27-2014, 02:59 PM | #1 |
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Gauge sending units?
I have a cummins swap in my truck and would like to use gauges that are closer in range the cummins needs. I have collected a few different range oil press and water temp, do I need the senders for the particular gauge I want to use?
When I had the 60psi oil gauge in it, it would bury the needle. Does that mean that it has the 80 or 100 psi sender on the engine?
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1990 GMC R35 CC dually, VE cummins, 47RH 2005 Silverado ecsb, 5.3, 2/4 drop, daily work wagon 2000 Yukon xl, 5.3 all stock, wife's truck 2007 Yukon Denali, 6.2 back up truck |
06-27-2014, 03:04 PM | #2 |
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Re: Gauge sending units?
The senders have to match the gauges. The senders are a resistance: a particular resistance equals a certain value. The sender and the gauges have to agree on that resistance curve, or the readings are meaningless.
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Rich Weyand 1978 K10 RCSB DD. |
06-28-2014, 04:06 PM | #3 |
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Re: Gauge sending units?
so how do you know what gauge works with what sender? do they have numbers on the gauge or is it guess and pray? I have never seen a listing for more than one oil sender the part number for the one on my pick up with a 60# gauge is the same number as my c70 with a 80# gauge.
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06-28-2014, 06:09 PM | #4 |
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Re: Gauge sending units?
I know my oil sender has 414kpa on one of the hex of the nut, my truck came with the 400kpa gauge, I would imagine that the 80/100 psi senders would be the same. As for the temp, my sender doesn't have a number on the side. I'm going back to the yard to grab the senders from the trucks I got the Gauges from, I'll post if there are numbers on those.
I think my senders are bad in my truck.
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1990 GMC R35 CC dually, VE cummins, 47RH 2005 Silverado ecsb, 5.3, 2/4 drop, daily work wagon 2000 Yukon xl, 5.3 all stock, wife's truck 2007 Yukon Denali, 6.2 back up truck |
06-29-2014, 06:05 PM | #5 |
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Re: Gauge sending units?
It's unlikely the Dodge or Cummins senders will have the correct scaled Ohmage over the Temp and Pressure ranges.
You need the senders for your GM truck. I ran a few bench checks on some working gauges for testing. The info is plotted on spreadsheet curves. Open Office 4 and Excel 2010 or later will open it. GM GAUGE_CURVES.xlsx
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06-30-2014, 08:45 AM | #6 |
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Re: Gauge sending units?
I'm running the GM senders on the cummins. I'm going to put in new senders, than I'll mess with the different pressures and temps.
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1990 GMC R35 CC dually, VE cummins, 47RH 2005 Silverado ecsb, 5.3, 2/4 drop, daily work wagon 2000 Yukon xl, 5.3 all stock, wife's truck 2007 Yukon Denali, 6.2 back up truck |
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