R1100 / R1150 Air temperature sensor values

[14TLC]

Hi Everyone

 

Does anyone know the resistance values for given temperature for Air temperature sensors on R1100 and R1150? I have these values but I am not sure if they are correct and for which sensor they are. One of them should be for R1100 and the other for R1150. I don't have a sensor near me to compare them

 

Temperature (°C) / Resistance (ohm)
0 / 5900
10 / 3800
20 / 2500
30 / 1700
40 / 1170
50 / 830
60 / 590
70 / 430
80 / 310
90 / 240
100 / 180

 

Temperature (°C) / Resistance (ohm)
0 / 16325
10 / 9950
20 / 6249
30 / 4029
40 / 2664
50 / 1802
60 / 1244
70 / 876
80 / 628
90 / 458
100 / 339

 

[dirtrider]

7 minutes ago, 14TLC said:

Hi Everyone

 

Does anyone know the resistance values for given temperature for Air temperature sensors on R1100 and R1150? I have these values but I am not sure if they are correct and for which sensor they are. One of them should be for R1100 and the other for R1150. I don't have a sensor near me to compare them

 

 

 

Morning  14TLC

 

Yes, I have the values for both but all my data is if (Fahrenheit)  not (Celsius).

 

If you do the conversions then re-post I will compare to my data.  

 

I'm in a meeting right now so don't have the time to do the conversions at the momment. 

 

 

[14TLC]

2 minutes ago, dirtrider said:

If you do the conversions then re-post I will compare to my data.  

 

Of course, here they are 

 

Temperature (°F) / Resistance (ohm)
32 / 5900
50 / 3800
68 / 2500
86 / 1700
104 / 1170
122 / 830
140 / 590
158 / 430
176 / 310
194 / 240
212 / 180

 

Temperature (°F) / Resistance (ohm)
32 / 16325
50 / 9950
68 / 6249
86 / 4029
104 / 2664
122 / 1802
140 / 1244
158 / 876
176/ 628
194/ 458
212 / 339

 

[dirtrider]

Morning 

 

The top one above most closely follows my 1150 IAT chart (your (C) conversions don't match my (F) chart as I did mine on evenly spaced (F) numbers but enough match up to say the top one  32 / 5900 --   212 / 180 is the 1150 sensor.

 

Are you sure that other sensor that you have is an 1100? It more closely follows my 1200RT IAT chart.

 

 

[14TLC]

To be honest I am not sure that the other one is an 1100 sensor. I thought so, but apparently is not. Could you post the values you have for 1100 sensor, even though they are in F

[dirtrider]

1 hour ago, 14TLC said:

To be honest I am not sure that the other one is an 1100 sensor. I thought so, but apparently is not. Could you post the values you have for 1100 sensor, even though they are in F

Afternoon  14TLC

 

Actually I won't post the numbers as they haven't been verified with precision equipment & I refuse to post unverified data under my screen name.  I took the 1100 IAT data a long time ago (early in 1995).  I have since plugged the numbers into a known NTC (Negative Temperature Coefficient) table & they don't totally mirror a proper temp vs resistance table (some points are real close & others are off a bit).

   

The 1100 values I have on hand & originally tested are very close to the 1150 sensor values. 

 

Back in the 1100 (Ma 2.2) era a lot of us 1100 riders removed the CCP then ran them open loop, so some of us did a lot of playing with the (Intake Air Sensor) output signal to spoof it & try to tune the fueling slightly with IAT (intake temperature) off-set.

 

Once the 1150 Ma 2.4 came out that kind of went away as most 1150  (Ma 2.4) bikes ran better in closed loop so with the o2 sensor operational spoofing the IAT did no good as the fueling computer just learned the spoofing off-sets then re-learned around the spoofing & even applied those re-learned adaptives to the open loop portion of the fueling control.

 

On the later BMW  motorcycles, if you are trying to build an IAT spoofer, then to achieve any lasting effect you will have to disable the o2 sensor, then clear the learned fueling adaptives, then run open loop (no functioning o2 sensor).   

 

What are you working on?  

   

[JamesW]

Isn't that about the truth D.R. when you describe  the difference between a 2.2 vs a 2.4 motronic and how easy it is to just snip the CCP jumper and all your fueling issues are gone.  Hindsight is 20-20 and if I were looking for an oilhead BMW I wouldn't consider an 1150.  When I owned my 1150 I spent hours and days trying everything to get the thing to run correctly and I was pretty successful in the end.  I experimented with the AIT sensor very early on without success.  The 2.4 adaptive motronic just won't cooperate.  Only thing that works is an AFXIED or an Innovate Motor Sports LC-1 or LC-2.  

[14TLC]

10 hours ago, dirtrider said:

The 1100 values I have on hand & originally tested are very close to the 1150 sensor values. 

 

Does this mean that 1150 sensor can be used on a 1100 and vice versa? What about on a 1100 with CO Pot, without O2 sensor and CAT ? How much difference it would make to use a 1150 sensor on such 1100 model?

[dirtrider]

4 hours ago, 14TLC said:

 

Does this mean that 1150 sensor can be used on a 1100 and vice versa? What about on a 1100 with CO Pot, without O2 sensor and CAT ? How much difference it would make to use a 1150 sensor on such 1100 model?

Morning 14TLC

 

 

Does this mean that 1150 sensor can be used on a 1100 and vice versa?-- Good question, I can't remember ever doing that  (might have but I don't have any data on doing it). As I mentioned above I did some IAT spoofing/testing on the 1100 (Ma 2.2)

 

What about on a 1100 with CO Pot, without O2 sensor and CAT ? -- There is something to be gained by playing with the IAT resistance on the open loop 1100 (Ma 2.2) systems, at least above idle where the Co pot has less effect. 

 

How much difference it would make to use a 1150 sensor on such 1100 model? -- I really can't answer this, this is probably worth investigating  but unfortunately using a GS-911 on the 1100 Ma 2.2 system won't give you IAT (Intake Air) temperatures so it would have to be done using a thermocouple in the air box vs IAT sensor resistance.         

 

The problem with comparing the 1100 (MA 2.2)  to the 1150 (Ma 2.4) is most of us that were playing with these things worked with the 1100 (MA 2.4) well before the 1150 (Ma 2.4) was released for production. Then once the 1150 (Ma 2.4)  came out THAT was our focus so we we didn't re-address cross model sensor swapping. 

 

 

                                                                                                                                                                                                                                                                                                                                                                                  

[14TLC]

Thank for your inputs dirtrider.

 

Next week I might have one R1100GS with MA 2.2 in my garage. Owner complaining about overly rich running condition and increased fuel consumption. The IAT sensor will be on the list of things to be checked. So, I will have the opportunity to make measurements and compare data. Will post the values here

[14TLC]

Good morning everyone,

 

The mentioned R1000GS arrived yesterday and I had the chance to measure the IAT. Here are the values. The scale of thermometer I used is in 2 degrees increments, thus the x6 values

 

Temperature (°C)	Temperature (°F)	Resistance (ohm)
16	60.8	4000
20	68	3181
26	78.8	2663
30	86	2237
36	96.8	1753
40	104	1520
46	114.8	1200
50	122	1045
56	132.8	843
60	140	715
66	150.8	614
70	158	531
76	168.8	442
80	176	388
86	186.8	328
90	194	290
96	204.8	245
100	212	220

[14TLC]

On 11/11/2021 at 6:52 AM, JamesW said:

and if I were looking for an oilhead BMW I wouldn't consider an 1150

Me also. In my taste, the R1000 is just a sweet running machine compared to the R1150

[dirtrider]

On 11/19/2021 at 3:24 AM, 14TLC said:

Good morning everyone,

 

The mentioned R1000GS arrived yesterday and I had the chance to measure the IAT. Here are the values. The scale of thermometer I used is in 2 degrees increments, thus the x6 values

 

Temperature (°C)	Temperature (°F)	Resistance (ohm)
16	60.8	4000
20	68	3181
26	78.8	2663
30	86	2237
36	96.8	1753
40	104	1520
46	114.8	1200
50	122	1045
56	132.8	843
60	140	715
66	150.8	614
70	158	531
76	168.8	442
80	176	388
86	186.8	328
90	194	290
96	204.8	245
100	212	220

Afternoon 14TLC

 

I plotted the IAT data you posted_

 

That looks to be a fairly representative 1100  temp vs resistance curve, couple of small irregularities but overall pretty decent. 

 

 

 

[14TLC]

Thank you dirtrider,

 

Good to know this, I now have reference values for R1100 IAT which I thought that I have but turned out to be R1200 IAT values. Thank you for that also.

Now to tackle the rich running condition and fuel consumption of this particular R1100GS