It's a PIC 16F1769.
Inputs for both cylinders connected directly to the chip, and so are the outputs. All signal conditioning is performed by software, thus the low parts-count.
AF-XIED for R1200 LC
- Thread starter Roger 04 RT
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It's a PIC 16F1769.
Inputs for both cylinders connected directly to the chip, and so are the outputs. All signal conditioning is performed by software, thus the low parts-count.
Well, if it has the same effect as it had on my TC the cost of the AF units is more than offset by the cost to change to a 1250��
I don't mean to rain on anyones parade, but that is a lot of boxes.
Here is one that does the same job…
The box is not sealed yet, as I am still considering alterations.
I keep it on top of the battery, underneath the fuel tank.
knutk
If it works as you say it does and replicates what the AF-XIED does, in a seemingly smaller more compact form, very impressive.
But then you say in a later post "I have absolutely no ambition of starting my own production line. I just made it to prove to my self that is was doable".
Nooooooooooo! Don't tease us with this nirvana device and then deprive us of ever getting one. Please.
So what is the advantage of this at £360 over a full remap at £300
Deleted account 200417001
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Hilltop is a better option
Since the number £300 comes up, I guess you refer to the HT-job.
In that case, it is actually not a remap. Merely remapping the ECU will not help very much, since it is adaptive. That is, the ECU builds it own map, based on feedback from the O2 sensor. These adaptive values are added/subtracted to the basemap in realtime, and the goal is to try to obtain a mixture with no need of realtime adjustments called upon by the O2 sensor.
According to HT, they have added an alternative management software in a vacant space in the ECU, and since they claim that the ECU still adapts, this means that they probably modify the O2 feedback in order to force the ECU to provide a richer mixture. Thus HT and AF-XIED provide the same result.
It boils down to the difference being that the HT job must be installed at HTs facility or you may disconnect the ECU and mail it in.
The AF-XIED is an addon that may be disconnected at any time, you may also adjust the amount of extra richness to suit your bike the best. When the bike is traded in, the AF-XIED may be removed and be used on another bike.
That said, the new 1250 is Euro 5, and it is claimed to have a O2 sensor after the CAT, in which case the current AF-XIED will no work. (and HT must rewrite their software)
As there is a 1250 on it's way to my garage, I am anxious to see how this works out. The fueling on the 1250 is claimed to be excellent. However, I have yet to see an engine that des not run even better with a slightly richer mixture beyond AFR 14,7.
Roger 04 RT
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Good explanation and I look forward to what you learn about how the 1250 uses that rumored 3rd sensor.
One comment though, it is only speculation on your part that HT modifies the O2 routine and richens the mixture. To my knowledge no one has tested the AFR of a post-HT bike. That would be easy enough to do by using an Innovate Motorsports LC-2. Until that happens all we have are user reports that “bikes are a lot better” after a hilltopping.
I base my assumption on the following, quoted from the HT website:
Quote:
Our software is self-learning, so you can change exhausts, air filters etc. without needing the ECU programmed again. This also means that the bike will perform optimally in all climates and at all altitudes.
I see no other way of keeping the system self learning than using feedback from the O2 sensor.
This also would explain how they may justify modifying an ECU sent by mail.
Roger 04 RT
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I think your reasoning is good. If you know where the O2 subroutine is, it might be quite straightforward to modify. I'd just like to see an AFR test to confirm that there is enrichment ...
Deleted account 191119001
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This is my layout:
Plug loom in at lambda probe, zip tie new connector to the existing one :
Route the cables up to the under seat area:
Then I got a bit of flat material and connected it to the top of the ecu with Velcro pads, and stuck the units to it:
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Nin just waking up to ask a question, does the ECU not get to hot underneath the materiel and velcro, or have you used something special to keep it cool the ecu, cheers in advance...
Holy thread revival!
Nope, no problem at all with heat under there, and all I used was some sticky velcro to hold the plate in place.
Sent from my iPhone using Tapatalk Pro
Nope, no problem at all with heat under there, and all I used was some sticky velcro to hold the plate in place.
Sent from my iPhone using Tapatalk Pro
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Roger 04 RT
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Nin’s install has AF-XIED and external RAM. Smogbob’s will come with just the two larger units with AF-XIED and RAM in one package.
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Hi Roger, one question I have relating to optimal fuelling on an LC.
I posted on another thread relating to Hilltop that I fitted a full Akra system to my 2013 LC and then had took it to HT. A few months later I had the bike tested at an independent dyno facility where it was shown to be putting out about 118-120 BHP and in the words of the technician was so optimally fuelled that he couldn't do anything to improve on it.
Knutk's response to my post was that as the LC had adaptive capabilities which meant it would sort itself out and therefore would be perfectly fuelled without the need for any remap! If this is the case then why is there any need for the AF-XIEDs on an LC bike?
I posted on another thread relating to Hilltop that I fitted a full Akra system to my 2013 LC and then had took it to HT. A few months later I had the bike tested at an independent dyno facility where it was shown to be putting out about 118-120 BHP and in the words of the technician was so optimally fuelled that he couldn't do anything to improve on it.
Knutk's response to my post was that as the LC had adaptive capabilities which meant it would sort itself out and therefore would be perfectly fuelled without the need for any remap! If this is the case then why is there any need for the AF-XIEDs on an LC bike?
Deleted account 191119001
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Hi Roger, one question I have relating to optimal fuelling on an LC.
I posted on another thread relating to Hilltop that I fitted a full Akra system to my 2013 LC and then had took it to HT. A few months later I had the bike tested at an independent dyno facility where it was shown to be putting out about 118-120 BHP and in the words of the technician was so optimally fuelled that he couldn't do anything to improve on it.
Knutk's response to my post was that as the LC had adaptive capabilities which meant it would sort itself out and therefore would be perfectly fuelled without the need for any remap! If this is the case then why is there any need for the AF-XIEDs on an LC bike?
Maybe post 11 and 14 may help in thread below from Roger
https://www.ukgser.com/forums/showthread.php/510633-1200-1250-GS-Watercooled-Engine-Tuning
Well Roger certainly knows his stuff, but I'm not expert at all in the technicalities of engine fuelling - hence my question.
My assumption (rightly or wrongly) was that I got an extremely well fuelled bike, which put out a very healthy and smooth amount of power and torque (as measured by an independent specialist facility) due to the work done by Geoff at HT.
If I have understood what Roger has explained in great detail, it would seem that my assumption is reasonable, as the adaptive capabilities of the LC ECU programming can only go so far, and would be unlikely to give the results I got without some level of further manipulation, although I've no idea what form that would take.
I might have got that wrong of course, but that's how I have interpreted things, given my somewhat simple understanding.
Deleted account 191119001
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Well as this thread is about AF-XIED and I just ordered some, I can only say I am convinced that the ECU can do what BMW wants it to do and to their limits, as they have the keys, and the AF-XIED is a physical piece of equipment that connects to the bike permanently, simply to change the fuelling a little to give better results, proven fact, as to the job done by the name of the company I will not mention, as to not get this good thread put in the taboo section, I will let Roger or Knut explain more as my knowledge, is probably no better than yours...
I didn’t read the links but as Roger has mentioned before a dyno run is done at wot only so it’s not a true reflection of your bikes fueling as we dont ride that way.
For all you know your bike could be perfect or far from it everywhere else. How adaptive is EGT as a means of detecting lean running for example which is the method used in your case. To my knowledge the axied trims the whole fuel map to the configured afr so you can be confident it is as desired everywhere. As confirmed by Rogers wide band lambda setup
For all you know your bike could be perfect or far from it everywhere else. How adaptive is EGT as a means of detecting lean running for example which is the method used in your case. To my knowledge the axied trims the whole fuel map to the configured afr so you can be confident it is as desired everywhere. As confirmed by Rogers wide band lambda setup
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