Cylinder Head Temperature Sensor, 0 280 130 017 Readings Options

[dlee6204]

I recently acquired a NOS temperature sensor for the one year only '73 Djet system 0 280 130 017. This sensor has been NLA for a very long time and finding a used one is very difficult. Given the rarity there isn't a lot of information on the proper resistance values of this sensor. Pbanders (https://members.rennlist.com/pbanders/DJetParts.htm) lists three data points for the resistance of this sensor but I thought I would post my findings. I also listed the values of the aftermarket sensor 0 280 130 012 available from 914Rubber.





@Superhawk996 This answers some of your concerns.

[Olympic 914]

correct me if I am wrong but

I see no reason, other than concours correctness, to use the original resistor instead of any 1/2 - 1 watt resistor of the same size

Presently i do not have the 270 ohm resistor installed on my 2.0 FI with 037 ECU but it would be easy enough to plug one in and see what it does.

Right now my MPS is tuned without the resistor.

[Superhawk996]

correct me if I am wrong but

I see no reason, other than concours correctness, to use the original resistor instead of any 1/2 - 1 watt resistor of the same size

Presently i do not have the 270 ohm resistor installed on my 2.0 FI with 037 ECU but it would be easy enough to plug one in and see what it does.

Right now my MPS is tuned without the resistor.

You are correct, a resistor is a resistor, is a resitor for a given resistance value. The only thing that really would matter is the power rating.

If you've already tuned your MPS without the resistor and are happy, I wouldn't mess with it.

I'm no D-jet expert but all the research I've done (Anders + other Djet sites) indicates that the analog ECU expects the resitance of the CHT + a 270 ohm offset for these 1973 ECU's.

Overall the end effect of the added 270 ohms on any other ECU (at operating temperature 200F +) would be to make the ECU think its running a bit colder and threfore a bit richer.