FPR project - cheaper, more available (for a while anyway)

[Captain Obvious]

11 hours ago, HusseinHolland said:

Any chance you can overlay the 028 values? I have no idea if the curve is similar, even though the values greatly differ.

I couldn't dig up any data for the 028 on the web. Do you have temp/resistance points from the Volvo service manual for that sensor? 

The only reference I could find for that sensor in what I have here is that it was used on the Volvo 760. That's the only application data I could find.

760 02.82 - 04.86
V6 2.8L 
K-Jetronic (Lambda)Coolant Temp. Sensor    0 280 130 028    8/83>

[Captain Obvious]

Oh, and to clarify... Do you have MORE temp/resistance points for the 028 than what you already posted above? The more, the better.

0 280 130 028: 
8500-11500 @ 68ºF 
770-1320 @ 176ºF

[HusseinHolland]

8 hours ago, Captain Obvious said:

I couldn't dig up any data for the 028 on the web. Do you have temp/resistance points from the Volvo service manual for that sensor? 

The only reference I could find for that sensor in what I have here is that it was used on the Volvo 760. That's the only application data I could find.

760 02.82 - 04.86
V6 2.8L 
K-Jetronic (Lambda)Coolant Temp. Sensor    0 280 130 028    8/83>

I put the Volvo test values in my post above 😁

8500-11500 @ 68ºF 

770-1320 @ 176ºF

[Captain Obvious]

I saw those data points. I'm looking for more.

With the turn of the page, you maybe missed that clarification?

[HusseinHolland]

24 minutes ago, Captain Obvious said:

I saw those data points. I'm looking for more.

With the turn of the page, you maybe missed that clarification?

Apologies - I missed the clarification. Volvo only gives those two  points. I'll put the one I have in heated water with a thermometer & get some other measurements over the next day or so.

[HusseinHolland]

On 9/6/2023 at 10:12 AM, Captain Obvious said:

Here's an excerpt from an old Bosch catalog that indicates that the 280ZX (which is the same as the 280Z) uses the 0 280 130 023:

 

And here's a chart I derived from the resistance points found in the Z service manuals:

OK - so I already installed the one 028 sensor in the cooling system, so I searched through my Volvo manuals, and found the chart - the axis is reversed compared to yours. it's much more linear though

[Captain Obvious]

Got it. I will poke around with that data and see what I can come up with.   

[Captain Obvious]

Here's a chart comparing the 023 (Z sensor) and the 028 (Volvo sensor).

If you do some water bath testing on either sensor, let me know how the testing compares to the chart: