JohnGS1100 Tuning Chip

[JohnGS1100]

Thanks for posting these good old manuals. Since the Oilheads run better with the TBs set up correctly I’d like to make two corrections to their content.

1. Zero=Zero is a bad alignment procedure that results in the throttle plate open too far. Zero=250mV is a correct, better procedure.

2. The correct tps voltage at idle is 340 mV.

Here’s a link to the background and z=250: https://advrider.com/f/threads/tps-...-beyond-zero-zero.996719/page-6#post-32357006

The Zero-zero method is totally wrong. That i believe and i think i am the only one people to BMW world bikers.. to believe that.

The reason is this one and it is a question and a problem for solution:

At full open throttle what shoud appears to Voltometer ?

The max volt that can give the TPS is 5 Volt.
So.. this is the answer.

Thats it the only sure adjust. 5 Volt at full throttles

... ...like carpyrator (we need it open full !!) for max power.

That is the maximum Volt that can give the TPS.

Thats must be appears exactly to the full open throttle.

Thats must know the ECU, full throttle = 5 Volt.

By thats adjust the ECU can read the final VALUE from the maps .. like the VALUE of injection at full throttle ... of ignition advance and of many other maps.

Thats must for the best power and torque but and the correct position from throttle to the maps in ECU.

Then when let the thorttle free close the mysterious will resolved.. for what is the correct voltage TPS close throttles ... 0,37 ? ... 0,34 ? or any other ?

BMW recommend 0,35-0,40 V.
I will see that next days.

Finally Thats will be the begin sure status for the other adjustments.. sychronization at 3.500 rpms ... at 1.500 rpms and .. to iddle speed.

I will make all adjust to some bike begin from full throttle=tps=5 Volts and AFTER then i will make the adjustments to low rpms and iddle speed and i try to explain how adjust and what about what do the big screws on throttles and the by pass stop throttles screws..

I write all in a manual .. will post soon what's the true. (No worry for english i will give it to a friend for good trnslation.

 

[Roger 04 RT]

I don’t have time right now to respond in full but your procedure is very wrong. 5V is not full scale on either of the two wipers in the TPS. Look at the bosch spec for the tps. Full scale is about 4.65V. Study the link I sent you above and look at the tps spec and you will see the correct procedure.

Also note that the Motronic learns the value of full open so it should not be set to 5V. At 5V the tps is WAY out of position.

I will try to explain more later.

 

[JohnGS1100]

Yes thats ritgh. 4,67 i see before 1 hour checking the tps.
The problem is that this voltage is the same (4,67) from middle until full open of throttle position. Thats not correct |(i believe).
I think that only at full open must be the voltage to the max (4,67 Volt) and when close it the voltage must be down linear until 0,34-0,40 Volts at close throttles.
But..
When i adjust the tps to 0 Volt at close throtlles the max value still be 4,67 Volt (full throttle) and by closing the throttle the voltage go down linear. and at middle opening of throttles is 3.80 Volt not the previous max value 4,67 Volt as the full open throttle.

SO ?

Bad TPS or ?

Will check again by a lot of TPS.
Also will change the voltage from a map in the chip maybe will make it linear the voltage of tps vs opening of throttle position.
I want make it working exactly like a carpyrator by linear opening of gas
Thats will give correct consumption and linear continius power (max to the full open throtlles).

 

[JohnGS1100]

Also note that the pins 2 and 3 of cable of TPS gives 4,97 Volt. That i see before 1 hour checking.

Maybe TPS works correct by starting engine ? and read the pins 2 and 3?

I confuse and i want found the problem because my stage 10 chip gives 94 hp to one bike and 86 hp to another same bike also gives same torque at middle rpms to both bikes.
The two bikes are on same condition and have same adjustments.

It is a big different to the power. So i believe that the 94 Hp power bike has correct TPS (4,97 Volt at full open throttle) and the 86 Hp bike has a bad TPS (4,67 Volt at full opening of throttles.

Maybe all the problems is from a bad TPS.

 

[Roger 04 RT]

Remember that there are two wipers in the Oilheads TPS. PINS 1-4 wiper is for 0.32 to ~23 degrees. Pins 3-4 is for 20 to 88 degrees.

So the pins 1-4 wiper reaches max at 1/4 throttle and then stays at max until 88 degrees.

The Motronic calculates the slope of each wiper and the crossover point.

 

[ssray]

R1100rt airtubes fitted yesterday, so glad I did it in freezing temps, must have made the job much quicker and easier.
First ride today, lots more pep and shove, really feel it atound 4k. Only did a 12 mile ride to the station today, so dar no loss of low down shove, I can still sit at 30 in 5th, i go through a average speed camera zone in birmingham daily

 

[JohnGS1100]

Next queation.
By non start engine the TPS works by the fisrt function..
If i start engine and open throttle will i see another voltage of tps to Voltometer? i meen after of half opening of throttle.
By non start engine after middle position of throttles the tps is 4.69 until full open..

 

[Roger 04 RT]

It will be the same, start or non start.

Do two tests non start
1. Measure voltage between pins 1 and 4 while you rotate the throttle
2. Measure the voltage between pins 3 and 4 while you rotate the throttle.

There are two pots in a TPS. Do you now see how each functions?

 

[JohnGS1100]

Will make all test to 2 R1150gs single sparks and many tps.
Hope to found the best adjustments for Boxers.

Thanks Roger.

Will post results..

 

[Roger 04 RT]

Thanks good luck. But I think I’ve worked out the best procedure, the May 27, 2017 post here: https://advrider.com/f/threads/tps-...-beyond-zero-zero.996719/page-6#post-32357006

 

[tuftywhite]

John,

I emailed you after we'd PM'd

Has it gone in your junk mail?

 

[JohnGS1100]

Tuftiwhite will check it email.

Roger i believe too that the correct tps adjust by close throttle is 0.34 Volt.

 

[JohnGS1100]

Tuftiwhite send me pm.here i dont found your email or give me your email pls.

 

[JohnGS1100]

This is the injection maps from R1150RT-GS twin spark.
White is the low throttle opening
Green is the high thorottle opening.

So..

TPS Voltage. Pins 1,2,3,4.

Pins 1,4 gives voltage from adjustment (0.34 - 0.40) until 4,67 Volts.
Pins 2,3 gives voltage until 4,97 Volts when start engine.

The low opening of throttles accepts orders from TPS pins 1,4.
The high opening of throttles (green in photo) accept orders from TPS pins 2,3 when the engine starting.

Thats all about mysterious of Voltage.

Thats BMW made because the air coming from low to high rpms and from low to high opening of throttle position is ton analog not lιnear.

It is like a mathematical geometric progress. Begin low air volume at low rpms (thats the reason for big crews) and go bigger volume of air to middle rpms and at high rpms the air volume is huge.

So there is needed another voltage parameter for choice the correct value of map.
So needed little helping to low rpms (for little more air) the little opening of throttles from 1.100-1.900 it is to low and the big scews affect this incoming air and gives the little more needed.

So the big screws is for adjust and gives more air from 1.100 until 1.900 rpms.
Abow 2000 rpms not affect nothing because the throttles are more open and gives the big air volume to engine.

The by pass stop screws are ONLY FOR IDDLE SPEED.


Final there are 2 problems.

1. Correct adjust of TPS.
2. Correct values to the maps.

By this (stock map) there is a problem and The ECU unterstand 2 maps. At very low rpms the ecu can do nothing!! What a big confuse !! Cnfuse from iddle speed until red line rpms.

ECU takes 2 electrical signals. 1 by pins 1.4 for low-middle maps and second signal for the high opening of throttle (high value of maps). No unterstand a standalone maps no untestand a linear gramical analogical (i dont know how to explain) how the air coming in engine, so it is a confuse to adjust the injection fuell. Also there is a lambda to many old boxers another confuse.


So What happen when start engine and driving ?

The ECU gives lean fuel at the end of low-middle maps. And by adjustment the TPS to 0,34 the enrichement of fuell is better to low rpms but stil be not correct at middle. Also there are surges at 2-3000 rpms, at 4500 rpms (arround).

At high rpms (second signal of TPS) there are surges and at 5000-5500 rpms. lean fuell at 5.500-6500 rpms and good fuel after 7.000 rpms but it is not practical it is too late and too hard to driving this boxer after 6.500 rpms.

The high throttle injection maps is reverse bad than the low-middle injection maps.
Gives lean fuell at begining (5.500 rpms) and rich fuell at the top end.

The motronic is very old and on '90 there was not so sophisticated improved ECU's.

The main problem for all bikers is the bad begining of this huge engine, the low not stable torque and the noices and poor power at middle to high rpms.

thats is the reason for many many manuals about adjustments of tps, of big screws and of by pass stop screws.

Thats also the reason that BMW have these screws and electrical 2 functions by 4 pins of TPS.
BMW not made update to this ECU because it is too hard to send chips to worldwide.
For new bikes it is easy, just you can go to a BMW service and connect and download the new firmware from internet automatically.


I made some test about this problem. It is like the mathematical problem ""Golden ratio"".

The solution is this one its complicated.

SOLUTIONS.

1. for R1100. Adjust close throttle of TPS is correct to 0,366 and to R1150 to 0,344.

2. Some change to the value of stock map. (considering of changes to the hardware of bikes such free air filter exhaust delete cat, other cams, other sprockets and more else).


Observe the steep switching between the numbers when the map is activated to high throttle opening.
It is not analog not linear like another map..

(I post the INJECTION MAP OF R1150RT TWIN, for Roger (he has this model), so i think it is easy to continue talking about he know very good the electrical systems of old boxers..)

Vertical axis is hte opening of throttle (go from close to full open from up side to down of the map).
Horizontical axis is the rmps (go from low to high from left to the ritgh side of map)

This is the correct maps for stock bike (i called stage 8 chip).

 

[JohnGS1100]

Here is the corrections that i made to stage 8 chip (for full stock bike).

AND HERE !!!!!!!!!!!!


INCREMENTS ( % ) from stock to stage 8 map (Zero means that i not made corrections.)

Thats resolves surges lean fuell and noices and offer a very nice riding by linear power and stable torque.. up to 15-20% to all revs of rpms.

Thanks for looking.

 

[JohnGS1100]

Finally. How can we adjust corectly all electrical and screws of throtlles ???

My method is from up to down (reverse like the reverse maps of this old ECU.

First step. TPS to 0,344 (for R1150). 0,366 to R1100.

Second step Adjust sychronization vagum at 3500 rpms by the LEFT CABLE.

Third step. Open big screws of throttles to 2 turns from closed.

4 step. Adjust sychronization at 1.500 rpms by ADJUSTMENTS little left or ritgh hte 2 big screws on throttles.
(As i said these screws are for helping the low opening of throttles at 1.100-1.900 to giving little more air needed. Not affect the 3500 rpms.).

5 step. Stop engine, close key and go to retired because now is the hard work.
We must adjust the idlle speed to 1100+ rpms and also we must sychronization both cylinder to idlle speed.

Restart engine and connect Voltometer, Vagum and take a little screws driver and a 8mm key.
Remove the airtubes of therottle and see behing and down of throttles, the little by pass stop screws.
Take a look at panel what rpms is the iddle speed. Look also the vagum what about sychronization.
Turn left or rith the little by pass stop screws until the iddle speed is correct ans sychronization.

But.. Here is the confuse. When adjust the left screws take a look to Voltometer. The TPS go to another voltage.
Re adjust the TPS and then. CLOSE AND RESTART ENGINE. (Thats the BIG tips). Ecu read again the new settings.
Again take a look to the panel and vagum.

Readjust more and more TPS+little screws+ sychro (close and restart engine for every time change the voltage of TPS ....until... iddle speed is correct.
As i not said ( ) these little big screws not affects abow 1200 rpms so there is not problem to 1500 rpms (still correct) and not affect the 3500 rpms (still correct).

If somebody have another idea i will be happy to hear..

Thanks !!!!!!!!!!!!!!!!!!!!!!!!!!!!1

 

[JohnGS1100]

Roger i post the map of this file (i think this is in your ECU) :

R1150GS-RT and R1100S twins
........R1150R/GS ECE+US R1150R/GS Japan R1150R/GS 91 Oktan R1150RT/RS ECE+US R1150RT/RS Japan R1100S ECE+US R1100S Japan keine Serie 768442802612078691037368120...

Download here : https://drive.google.com/file/d/1gIP78nV8129k58ov-zOEiHhSo_6vmlMy/view?usp=sharing



Note that there is and another file (this use R1100RS TWNS) but work and your bike.
R1150RS
........R1150R/GS ECE+US R1150R/GS Japan R1150R/GS 91 Oktan R1150RT/RS ECE+US R1150RT/RS Japan R1100S ECE+US R1100S Japan keine Serie 768000002612078691037367353...


...

download here :

https://drive.google.com/file/d/1NUzpz-t29kCVjlT0YJf9xkyWauD4Kxcz/view?usp=sharing


The diferrents compare these two bin files are these:
the lambda maps (richer at high rpms to RS) and to INJECTIONS MAPS is leaner to high rpms (RS).
Also the Cold main Ignition timing advance maps are the same but the Temp igntion advance is little faster to RS


And here you can look chat dynos diferrents by stock, stage 8, 9 and 10 chip. red blue gree bron line to each chip.

 

[brut33]

This is the injection maps from R1150RT-GS twin spark.
White is the low throttle opening
Green is the high thorottle opening.

So..

TPS Voltage. Pins 1,2,3,4.

Pins 1,4 gives voltage from adjustment (0.34 - 0.40) until 4,67 Volts.
Pins 2,3 gives voltage until 4,97 Volts when start engine.

The low opening of throttles accepts orders from TPS pins 1,4.
The high opening of throttles (green in photo) accept orders from TPS pins 2,3 when the engine starting.

Thats all about mysterious of Voltage.

Thats BMW made because the air coming from low to high rpms and from low to high opening of throttle position is ton analog not lιnear.

It is like a mathematical geometric progress. Begin low air volume at low rpms (thats the reason for big crews) and go bigger volume of air to middle rpms and at high rpms the air volume is huge.

So there is needed another voltage parameter for choice the correct value of map.
So needed little helping to low rpms (for little more air) the little opening of throttles from 1.100-1.900 it is to low and the big scews affect this incoming air and gives the little more needed.

So the big screws is for adjust and gives more air from 1.100 until 1.900 rpms.
Abow 2000 rpms not affect nothing because the throttles are more open and gives the big air volume to engine.

The by pass stop screws are ONLY FOR IDDLE SPEED.


Final there are 2 problems.

1. Correct adjust of TPS.
2. Correct values to the maps.

By this (stock map) there is a problem and The ECU unterstand 2 maps. At very low rpms the ecu can do nothing!! What a big confuse !! Cnfuse from iddle speed until red line rpms.

ECU takes 2 electrical signals. 1 by pins 1.4 for low-middle maps and second signal for the high opening of throttle (high value of maps). No unterstand a standalone maps no untestand a linear gramical analogical (i dont know how to explain) how the air coming in engine, so it is a confuse to adjust the injection fuell. Also there is a lambda to many old boxers another confuse.


So What happen when start engine and driving ?

The ECU gives lean fuel at the end of low-middle maps. And by adjustment the TPS to 0,34 the enrichement of fuell is better to low rpms but stil be not correct at middle. Also there are surges at 2-3000 rpms, at 4500 rpms (arround).

At high rpms (second signal of TPS) there are surges and at 5000-5500 rpms. lean fuell at 5.500-6500 rpms and good fuel after 7.000 rpms but it is not practical it is too late and too hard to driving this boxer after 6.500 rpms.

The high throttle injection maps is reverse bad than the low-middle injection maps.
Gives lean fuell at begining (5.500 rpms) and rich fuell at the top end.

The motronic is very old and on '90 there was not so sophisticated improved ECU's.

The main problem for all bikers is the bad begining of this huge engine, the low not stable torque and the noices and poor power at middle to high rpms.

thats is the reason for many many manuals about adjustments of tps, of big screws and of by pass stop screws.

Thats also the reason that BMW have these screws and electrical 2 functions by 4 pins of TPS.
BMW not made update to this ECU because it is too hard to send chips to worldwide.
For new bikes it is easy, just you can go to a BMW service and connect and download the new firmware from internet automatically.


I made some test about this problem. It is like the mathematical problem ""Golden ratio"".

The solution is this one its complicated.

SOLUTIONS.

1. for R1100. Adjust close throttle of TPS is correct to 0,366 and to R1150 to 0,344.

2. Some change to the value of stock map. (considering of changes to the hardware of bikes such free air filter exhaust delete cat, other cams, other sprockets and more else).


Observe the steep switching between the numbers when the map is activated to high throttle opening.
It is not analog not linear like another map..

(I post the INJECTION MAP OF R1150RT TWIN, for Roger (he has this model), so i think it is easy to continue talking about he know very good the electrical systems of old boxers..)

Vertical axis is hte opening of throttle (go from close to full open from up side to down of the map).
Horizontical axis is the rmps (go from low to high from left to the ritgh side of map)

This is the correct maps for stock bike (i called stage 8 chip).

Here is the corrections that i made to stage 8 chip (for full stock bike).

AND HERE !!!!!!!!!!!!


INCREMENTS ( % ) from stock to stage 8 map (Zero means that i not made corrections.)

Thats resolves surges lean fuell and noices and offer a very nice riding by linear power and stable torque.. up to 15-20% to all revs of rpms.

Thanks for looking.

Hi John,

You sent me the stage 8 chip in October. I'm now a little confused by these two posts you have made.
On the second post you say you've made corrections to the chip.
Could you please tell me if the chip you sent me is the corrected one?
Thanks.

 

[JohnGS1100]

This is my best fine tuning to r1150gs STAGE 8 CHIP. There was needed stable torque and linear continius power like electrical maschine.

I work on this project many hours for changning again and again the value of maps to injection fuell and igntion tinming advance.
Also i made expand to ignition time to the sparks and works like twin spark now .

It is a R1150GS full stock single spark bike :

 

[JohnGS1100]

Hi John,

You sent me the stage 8 chip in October. I'm now a little confused by these two posts you have made.
On the second post you say you've made corrections to the chip.
Could you please tell me if the chip you sent me is the corrected one?
Thanks.

Very few diferent just for play to a friends bike. (finetuning). not imprortant

How are you feeling your bike?