it can be located anywhere, as long at its away from engine/exhaust heat. I placed mine behind the front left side Beak panel. (see photos on page one of this thread).
New Accelerator Module tested
- Thread starter Yonkyo
- Start date
it can be located anywhere, as long at its away from engine/exhaust heat. I placed mine behind the front left side Beak panel. (see photos on page one of this thread).
Got mine today
Top man .. ordered Wednesday arrived Saturday..
Won't have time to try it yet
off to Turkey for a week 
with the family, 12 of us 
Give me something to look forward to when I get back
....2006 GSA
Top man .. ordered Wednesday arrived Saturday..
Won't have time to try it yet
off to Turkey for a week with the family, 12 of us Give me something to look forward to when I get back
....2006 GSA
SKON
Registered user
Just a bit of info wrt the Accelerator.
On the Dyno tests we did, it was found that while the Temp inside the Dyno was 24deg C, the addition of the Accelerator module (connecting the bike to the 911 Diagnostic unit) then fooled the ECU into believing the Temp was 17.3deg C.
Now this is great as the drop in Temp should tell the ECU that it's colder and therefore the air is more dense - therefore add more fuel.
The big problem was that when we connected the bike to the Dyno and the 911-plug we found inconsistent behaviour of the engine.
The graph looked like a spike on steroids..............
Then we realised what the bloody culprit was........... the Lamda sensors!
The Lamda measures and "sniffs" the mixture coming through the pipes and then tells the ECU to ignore the reading gotten from the Accelerator - and the ECU then tries to compensate.
In theory if the Accelerator module is connected - have the Lamda sensor modded as well to sniff less air - which would then give you a substantial improvement on the way the Accelerator affects your bike!
Any tips on how to mod/disable(?) the lambda sensor? Simply/cheaply are the words that spring to mind...
Cheers (F800 GSer)
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smartbear
Registered user
snifter valve
i think that in the car world* some people just space them out with washers so they do less "sniffing" as they are drawn further out of the exhaust stream
*well,in the smart car world anyway!
i think that in the car world* some people just space them out with washers so they do less "sniffing" as they are drawn further out of the exhaust stream
*well,in the smart car world anyway!
SKON
Registered user
i think that in the car world* some people just space them out with washers so they do less "sniffing" as they are drawn further out of the exhaust stream
*well,in the smart car world anyway!
That seems logical.And cheap
Nice one Smartbear 
got to be worth a couple of days experimenting 
I hope you don't mind but I got the older version so not connected to this thread so..
Took two days annual leave, today woke up, saw the postman walking by and my Accelerator planted on the floor.
Fitted to the bike in 10 mins (believe you me I am useless at anything mechanical).
God gave us a glorious day for a change and in his own county it was time to test it.
Firstly felt a difference straight away starting the bike up, it started more eagerly.
Next felt a difference riding through my village, I am in 3rd, nope Im in 4rth and that continued lol if I was in 4th before it would be coughing and spluttering.
Changing gear, why does it make it so smooth now?, changing up and down?
Vibes less, why does it? it is so much smoother, engine braking as it should be, throttle response immediate, limiter is more.
As you can guess a very happy bunny. The bike has truly been transformed to a more responsive, easier to ride machine.
I read the posts like most of you but believe you me, it really does make a difference.
Hope this helps.
R1200 GS 2004
Took two days annual leave, today woke up, saw the postman walking by and my Accelerator planted on the floor.
Fitted to the bike in 10 mins (believe you me I am useless at anything mechanical).
God gave us a glorious day for a change and in his own county it was time to test it.
Firstly felt a difference straight away starting the bike up, it started more eagerly.
Next felt a difference riding through my village, I am in 3rd, nope Im in 4rth and that continued lol if I was in 4th before it would be coughing and spluttering.
Changing gear, why does it make it so smooth now?, changing up and down?
Vibes less, why does it? it is so much smoother, engine braking as it should be, throttle response immediate, limiter is more.
As you can guess a very happy bunny. The bike has truly been transformed to a more responsive, easier to ride machine.
I read the posts like most of you but believe you me, it really does make a difference.
Hope this helps.
R1200 GS 2004
Good report fella Update:
As the weather has been improving and getting warmer, so has my new Accelerator been giving better results. In particular, fuel consumption on my daily 70 mile commute has improved.
Ambient temperature 18c – 27c = 49 - 52mpg (average).
My bike definitely loves this new accelerator in this warm weather.
gsbiker
Registered user
Hi Yonko, I've not been on here in a while, been focusing on my Buell for a few weeks. Seeing this thread pop up again and reading your latest test, I have a question. I've now fitted a K+N filter to my GSA with Accelerator. Bike is very responsive on acceleration (although can seem alittle flat compared to my now stock Buell beleive it or not). Still get the lite flat spots when hard accerating though through the rev range. I am still wondering what, if any difference a Power Commander will make if fitted and setup on my bike. Beed quoted about £500 for PC + rolling road but is it worth it compared to what I have now?
Last question, whats the 2010 GS like?
Last question, whats the 2010 GS like?
VFRman
Registered user
I think the accelarator module is designed to give more fuel when the Lamda sensor isn't being used. This would be at anything other than a constant or near constant throttle opening and below a low limit RPM I think? The BMW electronics weakens the mixture to get those great MPG figures when we arn't accelerating or idling.
Has anyone been able to find out where to get spark plug non-foulers? I can only find them in the USA.
OldCroc
OldCroc
SKON
Registered user
Just idly musing...but is it not true,that if we make the lambda sensor sniff less air,it will then send a message to `the brain`
,that the mixture is too rich and needs to be even leaner.Thus counteracting the `its chilly ,richer mixture` message from the accelerator module! Or am I missing something 
I suppose that if the lambda only sends a signal when on a constant throttle, and not when accelerating/decelerating,then it shouldnt have a negative effect on the operation of the accelerator module.
Any thoughts?
,that the mixture is too rich and needs to be even leaner.Thus counteracting the `its chilly ,richer mixture` message from the accelerator module! Or am I missing something I suppose that if the lambda only sends a signal when on a constant throttle, and not when accelerating/decelerating,then it shouldnt have a negative effect on the operation of the accelerator module.
Any thoughts?
I did the same thing, started to look for non-foulers.
It's an American car thing, so I went back to my old supplier of American car bits and bobs.
http://www.americanautoparts.co.uk/
£5 - ish a pair. (18mm or 14mm)
I believe it's 18mm that are needed.
Just idly musing...but is it not true,that if we make the lambda sensor sniff less air,it will then send a message to `the brain`
I suppose that if the lambda only sends a signal when on a constant throttle, and not when accelerating/decelerating,then it shouldnt have a negative effect on the operation of the accelerator module.
Any thoughts?
My understanding is the accelerator is only fooling the ECU over the incoming air temperature to the airbox. Therefore, the sensors will be correcting the fuel/air ratio based on it it being 20 degrees cooler than it actually is and therefore won't try and compensate as the ecu thinks everything is as it should be. This give 6% more fuel in open loop mode.
VFRman
Registered user
... and in closed loop the oxygen sensor is used to adjust the mixture to that "ideal" ratio. As I understand it the narrow band o2 sensor acts as a switch around 500mv so the ecu is looking for a switched type of response centred around 500mv. Now shifting the response of the o2 sensor could be used as a way of fooling the ecu to stop turning the gas off at a higher actual fuel ratio like the Xied kit used on Harleys.
http://www.nightrider.com/biketech/hd2007HD_nbo2_volt_divide.htm
http://www.nightrider.com/biketech/hd2007HD_nbo2_volt_divide.htm
SKON
Registered user
Hmm,food for thought...
Any idea what the resistor values in that link are? Dont understand how they can be `propriety`,they`re just a couple of resistors no?
CliveS
Registered user
Lambda sensor
Hi
As you all know I went with the Booster plug for the reasons I have explained before. I am still immensely happy with the plug.
After all this discussion about the Lambda sensor I contacted the Booster plug manufacture about it to put my mind at ease. I hope his explanation helps you as it did for me.
" But its correct that the lambda O2 sensor will constantly try to adjust the mixture back to factory level, but the time delay in the feed back system works to our advantage. When you maintain a level speed, the mixture is adjusted back to predetermined factory level, which is good for fuel economy. This is closed loop operation
But as soon as you move the throttle or rpm's, the cpu will shift to a different cell in the injection map, and the closed loop thing is disabled because of the time delay. Now the cpu relies on input from sensors, and the BoosterPlug can provide the enrichment that you need to improve driveability and accleration. This is open loop mode.
So the BosterPlug works as promised, and using the open loop / closed loop thing actively is a quite brilliant solution
Jens Lyck"
Hope it helps
Ride Safely
Clive
Hi
As you all know I went with the Booster plug for the reasons I have explained before. I am still immensely happy with the plug.
After all this discussion about the Lambda sensor I contacted the Booster plug manufacture about it to put my mind at ease. I hope his explanation helps you as it did for me.
" But its correct that the lambda O2 sensor will constantly try to adjust the mixture back to factory level, but the time delay in the feed back system works to our advantage. When you maintain a level speed, the mixture is adjusted back to predetermined factory level, which is good for fuel economy. This is closed loop operation
But as soon as you move the throttle or rpm's, the cpu will shift to a different cell in the injection map, and the closed loop thing is disabled because of the time delay. Now the cpu relies on input from sensors, and the BoosterPlug can provide the enrichment that you need to improve driveability and accleration. This is open loop mode.
So the BosterPlug works as promised, and using the open loop / closed loop thing actively is a quite brilliant solution
Jens Lyck"
Hope it helps
Ride Safely
Clive
Goose
Registered user
Any tips on how to mod/disable(?) the lambda sensor? Simply/cheaply are the words that spring to mind...
My mate was doing it in Cape Town just before I left......... he bought 4 x galvanised washers.... installed two on each Lamda and will check the performance....
The washers raise the Lamda, but there is still more than enough thread left for the sensors to sit firmly
Disconnect Accelerator Module in Hot Climes?
Going to Spain/France next week...should I disconnect Acc Booster or not?
Thanks
Going to Spain/France next week...should I disconnect Acc Booster or not?
Thanks
VFRman
Registered user
From what I've read so far I cannot see any reason for not leaving it attached but you must decide for yourself of course
Given that it can be removed using the tools in your bike's toolkit, you might as well leave it on.
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