Which Oil Pressure Sending Unit?
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Joined: Feb 2000
Posts: 118
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From: Bloomfield Hills, Mi
Which Oil Pressure Sending Unit?
I have an 86 Iroc which came stock with the 85 MPH speedo. I swapped in a 145 Speedo with a 60 psi Oil pressure gage. After the new engine install the oil pressure needle hangs out at the very top (over 60 psi) at any rpm but idle. At idle it says about 40 psi. Is there are different sending unit for this cluster? If so, anyone know a part number or what it came off of so I can get the right one? Thanks for the help.
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1986 IROC
New Crate 350 w/Vortec Heads, Edelbrock 2116 Vortec Manifold, Edelbrock Performer 2102 Cam, Edelbrock 1406 carb, Hedman shorty headers, Flowmaster Catback, Rebuilt 700r4 w/vette servo, etc..
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1986 IROC
New Crate 350 w/Vortec Heads, Edelbrock 2116 Vortec Manifold, Edelbrock Performer 2102 Cam, Edelbrock 1406 carb, Hedman shorty headers, Flowmaster Catback, Rebuilt 700r4 w/vette servo, etc..
Supreme Member
Joined: Jul 1999
Posts: 1,335
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From: Tucson, AZ, USA
Car: '92 Z28; Dk Teal; Her Pkg
Engine: 305
Transmission: Richmond 6 Spd
Axle/Gears: Moser 9", Detroit Locker, 3.70
The oil pressure sender should be the same for both gauges. The sender is a variable resistor that has a resistance of 0 ohms at 0 psig & 90 ohms at maximum scale pressure. If you ground the wire that goes to the gauge at the sender, the gauge should read zero. If the wire is not connected (open) the gauge should read beyond its maximum pressure position.
Tim
Tim
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