I've been trying to track down what the resistance range on a gm oil pressure sender translates into oil pressure.
I've found they are 90ohm to 0 ohm, but don't know what corresponds to 45psi, etc.
Does anyone know, or where I can find the information?
Jack
gm oil pressure resistance
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If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
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nimblemotors
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nimblemotors
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Re: gm oil pressure resistance
well that was disappointing nobody could answer this question.
So I spent about 3-4 hours and got all the fittings and hooked it up to two different air compressors,
one with 0-30psi, and the other 10-100psi, and took measurements at different pressures.
The oil pressure sensor is the stock unit for a 1987 Chevy, this specific part number fits many chevy's 85-90's.
The resistance values had distinct steps, 20 different resistances were found.
I report on the steps as decreasing pressure, i.e. I put 100psi
and leaked it down, numbers are rounded.
You could pretend this is 0-80psi sensor where PSI = Resistance + 10, but it would be off a little.
PSI Resistance
90-100 107 (max)
80-90 95
75-80 90
70-75 86
65-70 82
62-65 79
60-62 75
56-60 72
52-55 68
50-54 65
48-50 61
45-48 58
41-44 55
39-41 50
35-39 45
25-30 41
21-25 36
20-21 32
15-19 27
11-15 24
5-10 20
0-5 0
Hope my results helps the next hapless person searching the web for the information.
And since you've read this, I reward you with a link to my video where I converted my tractor to a Distributerless Coil-On-Plug ignition
http://www.youtube.com/watch?v=imQkWVtHjRs
$44 in junkyard coils, $25 junkyard ignitor, a $12 isolated 12v-5v DCDC, $3 processor, $5 in opto's, and $2 hall-effect sensor.
So I spent about 3-4 hours and got all the fittings and hooked it up to two different air compressors,
one with 0-30psi, and the other 10-100psi, and took measurements at different pressures.
The oil pressure sensor is the stock unit for a 1987 Chevy, this specific part number fits many chevy's 85-90's.
The resistance values had distinct steps, 20 different resistances were found.
I report on the steps as decreasing pressure, i.e. I put 100psi
and leaked it down, numbers are rounded.
You could pretend this is 0-80psi sensor where PSI = Resistance + 10, but it would be off a little.
PSI Resistance
90-100 107 (max)
80-90 95
75-80 90
70-75 86
65-70 82
62-65 79
60-62 75
56-60 72
52-55 68
50-54 65
48-50 61
45-48 58
41-44 55
39-41 50
35-39 45
25-30 41
21-25 36
20-21 32
15-19 27
11-15 24
5-10 20
0-5 0
Hope my results helps the next hapless person searching the web for the information.
And since you've read this, I reward you with a link to my video where I converted my tractor to a Distributerless Coil-On-Plug ignition
http://www.youtube.com/watch?v=imQkWVtHjRs
$44 in junkyard coils, $25 junkyard ignitor, a $12 isolated 12v-5v DCDC, $3 processor, $5 in opto's, and $2 hall-effect sensor.