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Thread: OEM Oil Pressure Sensor

  1. #11
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    Just FYI: This applies to a 3-wire oil pressure sensor only. If you have a 1-wire like the '98-'02 LS1 had, it won't work with the Holley because it's a voltage drop based sensor.
    -Scott
    Don't forget to check out progress on my Race Car:
    Project Blasphemy - 8.07 @ 171
    Low 8 Second Street Car

  2. #12
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    Nov 2015
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    Orlando, FL
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    Quote Originally Posted by 1971camaroguy View Post
    The curve will look like this. Get it set that way with this sensor and you will be good to go.
    Is the pin-out the same?
    Scottie
    Turbo LS Mustang
    8.71 @ 156.79

  3. #13

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    Quote Originally Posted by Scottie-GNZ View Post
    Is the pin-out the same?
    Sorry I'm late to answer, but yes, the Holley oil pressure connector was plug & play for the part number I listed.

  4. #14

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    Quote Originally Posted by 1971camaroguy View Post
    This is an old thread, but I wanted to add a pic of the way the scale should look for a stock GM oil pressure sensor. I'm using an ACDelco Oil Pressure Sensor, part D1846A. The curve will look like this. Get it set that way with this sensor and you'll be good to go.

    Attachment 1675
    Digging up an old thread again. That chart from post #10 is not linear, the X axis values were not made linear. Should look something like this I think. Please fact check me.
    Linear
    Volts PSI
    0.50 0
    0.77 9
    1.03 17
    1.30 26
    1.57 35
    1.83 43
    2.10 52
    2.37 61
    2.63 69
    2.90 78
    3.17 87
    3.43 95
    3.70 104
    3.97 113
    4.23 121
    4.50 130

  5. #15
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    Quote Originally Posted by Dan W View Post
    That chart from post #10 is not linear, the X axis values were not made linear. Should look something like this I think. Please fact check me.
    Yeah, you're right. The linear Sensor Voltage axis would be as you wrote it. However, did he acquire that from GM documentation? Is that the actual GM oil pressure sensor voltage curve?
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  6. #16

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    Not 100% sure that he got it from GM documentation. I haven't tested the sensor myself. S2H who seems to be respected guy here said it was .5-4.5 and 0-130 in a post or two I saw. There's also a thread on YellowBullet where TJ tested one. He tested it in 10 psi increments, so the numbers don't exactly align, but when I overlay them in Excel with what I posted above, they are very close...at least as close as you'd expect for non-calibrated instrumentation. Here are his numbers:
    0.51 0
    0.76 10
    1.06 20
    1.36 30
    1.67 40
    1.96 50
    2.27 60
    2.58 70
    2.89 80
    3.22 90
    3.6 100
    3.9 110
    4.2 120
    4.5 130

    Why can't I directly upload an image?

  7. #17
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    Quote Originally Posted by Dan W View Post
    Why can't I directly upload an image?
    Pictures must be linked to a picture hosting website, or they can be "zipped" (compressed folder) & attached directly to a forum post ("Go Advanced").
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  8. #18

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    Alright, the calibration curves attachment shows the three different curves. The linear one, the one TJ found when he physically tested a sensor, and the one I believe to be wrong from earlier in this thread. The 2nd attachment is from the linear data.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	oil pressure sensor cal curves.jpg 
Views:	13 
Size:	97.3 KB 
ID:	8873   Click image for larger version. 

Name:	Linear.jpg 
Views:	13 
Size:	83.7 KB 
ID:	8872  
    Last edited by Dan W; 10-27-2019 at 06:01 PM.

  9. #19

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    Anyone try this scale with the GM sensor?
    Last edited by MontanaMade; 10-30-2019 at 07:52 PM.

  10. #20
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    Nov 2014
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    All those scales will be close. Myself, I really don't care if the reading is a little off. If the actual oil pressure is 45 lbs and the reading you are seeing is 43 lbs, does it really make that much of a difference? To me the sensor is there to tell me if I have a problem, if my oil pressure is at 43 lbs and all of the sudden it is at 25 lbs under the same conditions, I know I have a problem. To me it's the change in oil pressure under the same conditions that matter, not the actual number itself.

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