NTC Temp Sensor Transfer Function

[R3VM3UP]

Hey guys, I'm looking to install a radiator outlet temp sensor for electric fan control on my S54 swapped e30. I'm not using an E46 radiator/outlet hose, so the stock E46 M3 o ring sensor isn't really an option. I'm trying to figure out which of the temperature sensor transfer functions in the MSS54 correspond to the physical sensors on the vehicle.

I found these 4 transfer functions. I think TMOT might be the main coolant temp sensor on the coolant out manifold on the side of the head. TKA appears to be the exact same transfer function. Anyone able to provide some help in determining what physical sensors these correspond to?

KL_TMOT_NTC

51	140
136	100
226	80
367	60
755	20
900	0
939	-10
978	-20
992	-30
1023	-47

KL_TAN_NTC

63	140
248	80
383	60
558	40
731	20
871	0
957	-20
992	-48

KL_TDME_NTC

11	140
15	130
20	120
27	110
37	100
51	90
72	80
102	70
144	60
205	50
289	40
398	30
663	10
882	-10
947	-20
985	-30
1006	-40
1015	-48

KL_TKA_NTC

51	140
136	100
226	80
367	60
755	20
900	0
978	-20
1023	-47

[R3Z3N]

I posted here which sensor/connector and pins are needed to replace the stock sensor with the same scaling, synopsis 3rd page orange cells:
Just need to weld on a bung. I had a random shop do it for $40


Rad Outlet Temp Sensor 13621433076 12521427787 2x 12521427608 Bosch Jetronic Protective Boot :1280703031

[terra]

TMOT is the main coolant sensor, TKA is the radiator outlet sensor. TAN is IAT. TDME is the temperature of the DME itself (I believe there is a sensor on board)

[R3VM3UP]

Awesome guys, thanks for the heads up. I'll update the XDFs for future reference.

[ZiMMie]

I posted here which sensor/connector and pins are needed to replace the stock sensor with the same scaling, synopsis 3rd page orange cells:
Just need to weld on a bung. I had a random shop do it for $40


Rad Outlet Temp Sensor 13621433076 12521427787 2x 12521427608 Bosch Jetronic Protective Boot :1280703031

I think you can get away without welding in an bung.

A cleaner solution will be to use the fan switch connector on the radiator,
get an m14x1.5 to m12x1.5 adapter and use the sensor.

[BBRTuning]

FWIW both coolant temp sensors on the S54 (main and outlet) use the same scaling. I used the same lookup table for both in a standalone ECU and have checked them at various different temperatures and they correlate nicely.

[R3Z3N]

I think you can get away without welding in an bung.

A cleaner solution will be to use the fan switch connector on the radiator,
get an m14x1.5 to m12x1.5 adapter and use the sensor.

Depends on the radiator. Mine needed a bung, and I had it welded as close to the coolant hose flange as possible.