Accelerator Module

[Goose]

Chaps - my bike was also Dyno-tested last week for issues with BMW.

Part of the test was to prove that the ECU controlled the very lean AF mixture, which was done by disconnecting the 2 Lambda sensors.
We did notice that the bike ran richer - instead of 14.85:1, it was running at 14.2:1 while gave some nice power curves.

For the past week - I have been riding with the Lambda's disconnected.... WHAT A DIFFERENCE! The bike is more responsive and I can easily do hill climbs with the missus without any "pinging" or strain of the engine. A twist of the throttle and the GSA just moves!

I think that with a module fitted as well... there would be substantial changes noticed.

Would be keen to hear from anyone else that could try this?

 

[GB.]

Doesnt that bring a fault code up?

 

[Goose]

Doesnt that bring a fault code up?

Could possibly when testing - however the bike's going like a bat-out-of-hell and the performance is amazing no errors on the bike's display though!

 

[nanotech9]

I took my '05 1200 GS over to a Geek and Nerd get-together... They do this monthly hangout thing and work on each others projects. My brother helps put it all together.

They hooked up a scope on the BMW AIT plug and found no extraneous signals. It was a very clean 5v signal.

We were looking to see if there was a hidden digital signal on the line, or even a dirty signal sensitive enough to pick up RPM's, but there is not.

Unless this plug is set up to receive special signals from an aftermarket unit, but doesn't send the signals through the factory Thermistor, then I say that any claims based that changes can be made sensing throttle position or RPM's from this plug alone are bogus.

The only other way to modify the signal that the geeks and nerds could suggest is to use a capacitor and store the incoming voltage and instead of applying a resistance, simply have a circuit that feeds back the desired voltage to simulate the temperature drop. The same result as using a resistor, but could be more precisely controlled, and could be used with a chip that sets up a custom resistance curve for the different ambient temps.


The geeks and nerds also wanted to let me have them make a module that piggybacks into the plugs in front of the injectors, capturing the signal, and modifying it to leave the injectors open slightly longer. This could be based off an RPM pickup, and could be 100% mapped as detailed as wanted (say every 250 RPM change).

I.e. they wanted to make a power commander... lol. Oh, and not to forget they wanted to use a bluetooth module that would let you see and make changes to the map on the fly from your phone or laptop.

Not sure if i want to invest the money in that R&D, or take a chance on them killing my bike

 

[GB.]

When I had my Buell the German Buell club developed a system called ECMspy, this was available free while it was being developed with help from club members both sides of the channel. It lets you modify you mapping and ignition timing as well as reading and clearing fault codes. You could test all electrical components, coil, fuel pumps, injectors etc. You now had complete control over your bikes electronics for just the price of a lead, awesome, surprised with the amount of about someone hasn't developed something similar.

 

[Rasher]

You now had complete control over your bikes electronics for just the price of a lead, awesome, surprised with the amount of about someone hasn't developed something similar.

I think Geoff at Hilltop may have got his hands on something along those lines.

There is mucho free software out there for all sorts of ECU's, when I was looking at Triumph's I found a freeware program that could remap the Triumph motors, you could alter both fuel and ignition right down to individual cylinder trimming.

It looked well developed and they even had downloads for various exhaust configurations etc.

 

[claw]

Chaps - my bike was also Dyno-tested last week for issues with BMW.

Part of the test was to prove that the ECU controlled the very lean AF mixture, which was done by disconnecting the 2 Lambda sensors.
We did notice that the bike ran richer - instead of 14.85:1, it was running at 14.2:1 while gave some nice power curves.

For the past week - I have been riding with the Lambda's disconnected.... WHAT A DIFFERENCE! The bike is more responsive and I can easily do hill climbs with the missus without any "pinging" or strain of the engine. A twist of the throttle and the GSA just moves!

I think that with a module fitted as well... there would be substantial changes noticed.

Would be keen to hear from anyone else that could try this?

Sounds interesting

Has it effected fuel consumption at all?

I was thinking about adding the two washers to the sensors. I wonder with the Lamda's disconnected the ecu just goes into a default mode, and doesn't show an error

 

[Demongroover]

Just ordered me the extended unit based on the comments here.
Hope it works ok.

Where should I position the temp sensor? Front, rear, near air intake?

 

[Yonkyo]

Just ordered me the extended unit based on the comments here.
Hope it works ok.

Where should I position the temp sensor? Front, rear, near air intake?

I cable tied mine behind the left beak panel, were it wont be effected by Exhaust/engine heat.

 

[Demongroover]

Thanks Yonko, Iguess it needs ambient temperature then.
I'll do as you suggest.

 

[Allan F]

Had the first good run since fitting the accelerator module. A good mixture of roads. Can't say I noticed much difference, to be honest !

 

[ianp5uk]

Doesn't surprise me.
I fitted a PC3 and had it dyno'd. It did pull better but it wasn't a big enough improvement to be worth the hit to fuel consumption in my opinion. I "think" with the PC5 you can use the Lamdas to autotune a specific fuel/air ratio and have a dual map. That would be worth doing. You could have a max throttle response setting and a standard for economy.

 

[Yonkyo]

Had the first good run since fitting the accelerator module. A good mixture of roads. Can't say I noticed much difference, to be honest !

What model year is your GS?

judging by feedback to date. The most noticeable improvements are felt by owners of gen2's (post 2007 - pre 2010) as these seen to run quite lean.

 

[Allan F]

Hi Yonko,
Mines & 08 model GSA. 16 k miles. Full Akro system & K&N filter. I was maybe expecting too much, after reading all the reports ??

 

[Yonkyo]

Hi Yonko,
Mines & 08 model GSA. 16 k miles. Full Akro system & K&N filter. I was maybe expecting too much, after reading all the reports ??

Humm, You should have felt the most benefit on your bike

The performance gains are not startling. But you should have felt some improvements in low speed driveability and smoothness, and a better pick-up.

 

[OldCroc]

Sounds interesting

I was thinking about adding the two washers to the sensors. I wonder with the Lamda's disconnected the ecu just goes into a default mode, and doesn't show an error

I have a few sets of Spark Plug Non-foulers and am happy to part with them for a small charge. if interested please pm me.

OldCroc

 

[simplysounds]

i got one today - sol2 thingy. great bit of kit (however simple it is). bike has much more power and smoother low down. what a transformation. this is how the bike should be.

 

[aceranic]

You lucky

 

[gsbiker]

I'll be selling my accelerator module soon if anyone is interested as I'm getting a PC + map fitted.

Fits 2008 GS

 

[Rasher]

A good mod IMHO, was not so sure of difference after having it on for a while, so took my long weekend as a chance to test it properly.

Removed it for journey outbound, cue 150 miles of annoying surging and constant popping and banging (although I do class the noises as character)

Refitted after arrival at holiday cottage and it was a revelation, much smoother and I am sure a bit more low-mid range power (may just be helping get most from cat-less headers) plus the Women hates all the "silly noises" which she finds embarrasing as she reckons it sounds f**** - Pointing out she can always put the black visor on does not get approval.

Outbound I managed 42mpg, coming home 43mpg and I tried my best to ride the "same way". This was two-up with full luggage so not too dissapointing.

One thing I have noticed is fuel consumption plummets past 80mph and the cases have a large effect as well.

On a ride out on Sunday (module fitted) whilst being held up by my mates ZZR1400 I managed to average around 53 mpg (two-up, no cases and limited top speeds so his Mrs could catch up on the straights) although I cannot ever see me riding slow enough to regularly attain this, it is nice to know if your low on fuel slowing down will help (My ZZR did 40mpg at 100mph fully loaded and two up, yet barely managed 45mpg at 80mph solo - no point slowing down really)

Overall I prefer the feel of the bike with the module, fuel consumption is about the same and I am sure it is also far less likely to drop a valve, not bad for £30 (worth the extra £29.98 over a resistor bodge just so I can fit it in seconds without hacking up the bikes wiring)