LS1 Conversion
Thread Starter
Racer
Joined: Sep 2004
Posts: 495
Likes: 1
From: Spokane Washington
Need Temp Sensor for a LS1 Conversion
I need a single wire temp sending unit for a LS1. It needs to be 85 to 135 ohm I believe. It has a 12mm size thread. I have included a picture with a 12 mm wrench. The picture is of the plug in the place where the sending unit will go. I need two of them does anyone have one. This is in my Newman chasis 1961 with a LS1 motor, but I would think anyone putting a LS1 in a C3 would have the same issue.
Anyone have any ideas.
thanks
Cal Camara
Anyone have any ideas.
thanks
Cal Camara
Last edited by cal camara; Apr 21, 2011 at 05:48 PM. Reason: better title
Safety Car
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
You can buy a 3-wire temp sensor for a 98 Camaro and a plug to fit it at NAPA. The 3rd wire is for the temp gauge. I bought the cheapest one available and the resistance was way too high so it never worked right, but others have had success using it so maybe a name brand sensor would work OK. I ended up making an adapter to fit into the smaller heater hose and used an original-style temp sensor and put the original 2-wire sensor back in the head.
Rick B.
Rick B.
Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
A earier post from my swap.
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I put the 68 vette temp sender (1/2 NPT) in the block plug of my LS motor. It wouldn't fit the small head bosses. I'm also using the 68 gauge. It's reading higher temps than the head, determined by aftermarket gauge and IR temp gun. Could be because of the location close to the headers.
The LS computer reads the temp from the drivers side front sensor. On the 98 camaro, a computer/gauge sensor combo is used. The rest of the years get gauge temp from the computer.
I want to keep the 68 gauge. So the data on the gauge resistance is below, so is my solution.
I got the following temp info for the 68 gauge from Willcox on CF.
temp/resistance
220/70
200/90
180/115
160/140
120/250
100/340
I measured the 98 camaro LS sensor below:
temp/resistance
192/215
181/272
157/428
135/675
105/1225
In addition, I've got an aftermarget (harbor freight) gauge sensor that's calibrated as follows:
http://www.harborfreight.com/cpi/cta...emnumber=98481
temp/resistance
260/70
200/140
185/210
165/280
150/350
A 250 ohm resistor in parallel with the harbor freight sensor gives nearly identical values to the original vette sensor. I used the adapter from these guys:
http://www.speedwaymotors.com/LS1-Wa...pter,8195.html
The HF sensor bound up on the adapter so I use a 1/8 NPT male/male and female/female to space it out.
-----------------------------------------------------------------
I put the 68 vette temp sender (1/2 NPT) in the block plug of my LS motor. It wouldn't fit the small head bosses. I'm also using the 68 gauge. It's reading higher temps than the head, determined by aftermarket gauge and IR temp gun. Could be because of the location close to the headers.
The LS computer reads the temp from the drivers side front sensor. On the 98 camaro, a computer/gauge sensor combo is used. The rest of the years get gauge temp from the computer.
I want to keep the 68 gauge. So the data on the gauge resistance is below, so is my solution.
I got the following temp info for the 68 gauge from Willcox on CF.
temp/resistance
220/70
200/90
180/115
160/140
120/250
100/340
I measured the 98 camaro LS sensor below:
temp/resistance
192/215
181/272
157/428
135/675
105/1225
In addition, I've got an aftermarget (harbor freight) gauge sensor that's calibrated as follows:
http://www.harborfreight.com/cpi/cta...emnumber=98481
temp/resistance
260/70
200/140
185/210
165/280
150/350
A 250 ohm resistor in parallel with the harbor freight sensor gives nearly identical values to the original vette sensor. I used the adapter from these guys:
http://www.speedwaymotors.com/LS1-Wa...pter,8195.html
The HF sensor bound up on the adapter so I use a 1/8 NPT male/male and female/female to space it out.
