General Category > General Discussion
Engine Remaping
marki_gsa:
--- Quote from: StephanT on October 07, 2013, 10:31:27 AM ---I think it is a matter of misinterpretation, or misunderstanding...
I don't know of anyone who currently flashes the BMSK through the diagnostic port. They all do it by opening the ECU and reprogramming the whole flash with a BDM...
that means the whole flash is written... hence the "Whole flash is replaced"... but that does not mean the whole flash is new...
there will/could/should be a Copyright issue... but i don't want to go into that now...
best,
Stephan
--- End quote ---
I think this is a reasonable interpretation of what is happening Stephan.
Sorry the warranty part was meant for a comment further up and not for your hp2 specifically.
Don't get me wrong, I know he (hilltop) is doing good work and it's definitely a good way to go, possibly even the best way to go unless you want to fiddle yourself. He has many happy customers and I haven't heard anything bad. As with any tuner though I believe there could be a little snake oil in there as well just to sweeten the deal. Nothing bad or dishonest just maybe glorified a little. :)
WarthogARJ:
Yes I am about 99% sure they do it by pulling the BMSK module: Max says that's what he does, and I did not ask Hilltop this but will do so.
And yes, I now suspect they do not actually replace the flash with completely new firmware.
But as you say, add some more maps.
I think their main customers are guys with Japanese superbikes with more HP that my HP2 has cubic centimeters....and maybe these guys don't really ask too many technical questions when they are promised some extra power.....
But the company seems to be an honest crowd with a good reputation: and I know of BMW riders (on the UKGSer forum) who liked the job.
I will call them up again and attempt to get some more details.
Thanks!
Alan
Haakon:
If this was a reply to my input:
Not at all what I was thinking of. A few companies sell programmed EPROM chips for direct replacement.
That IS the easiest, cheapest and (almost) only way to do this.
The EPROM chip itself cost in the region of 5- 10$
What cost is to write the program (maps and other stuff)
The programming itself is also very cheap once the code development is done.
I do not think there will ever be a copyright issue.
2 German firms (that I know of) do sell "modified" chips.
It would be very difficult to prove "they" just modified the original maps(s)
-----------
YOU know this :-)
Anyways, it is NOT a GS911 issue or topic.
(I pray it might be, in the future, IF you have the time to incorporate a remap function)
God bless you all - the GS911 crew!
---------------
A modification to my former posting.
BMW do remap- (never modify- its always a completely new map) via the diagnostic connector.
BUT!!! To do that with the GS911 would cost so much in software development than it not possible.
Development cost is minimal compared to the risk doing so.
IF a (GS911) remap failed a owner would be "stranded" with a dead bike.
My guess is BMW would refuse to even try help...
Guess I
--- Quote from: StephanT on October 07, 2013, 10:31:27 AM ---I think it is a matter of misinterpretation, or misunderstanding...
I don't know of anyone who currently flashes the BMSK through the diagnostic port. They all do it by opening the ECU and reprogramming the whole flash with a BDM...
that means the whole flash is written... hence the "Whole flash is replaced"... but that does not mean the whole flash is new...
there will/could/should be a Copyright issue... but i don't want to go into that now...
best,
Stephan
--- End quote ---
StephanT:
--- Quote from: marki_gsa on October 08, 2013, 08:34:57 PM ---Don't get me wrong, I know he (hilltop) is doing good work and it's definitely a good way to go, possibly even the best way to go unless you want to fiddle yourself. He has many happy customers and I haven't heard anything bad. As with any tuner though I believe there could be a little snake oil in there as well just to sweeten the deal. Nothing bad or dishonest just maybe glorified a little. :)
--- End quote ---
Just for the record, I have nothing against remapping... especially when a professional does it... Due to the strict EU3 regulations there is a lot more that can be had from a stock engine, including a smoother ride... that surging of the boxer motor at around 5000rpm if memory serves, is where some of the regulatory checks are specified... i.e. pass the test at that rpm and you're good to go.. which means that a lot of vehicle are running leaner there, or at least uncharacteristically different ;-) ...which is itself is a worthwhile fix...
StephanT:
--- Quote from: Haakon on October 09, 2013, 03:10:41 AM ---If this was a reply to my input:
Not at all what I was thinking of. A few companies sell programmed EPROM chips for direct replacement.
That IS the easiest, cheapest and (almost) only way to do this.
The EPROM chip itself cost in the region of 5- 10$
--- End quote ---
That still holds true for up to the HELLA ECU's, (BMSC and BMSC2), like yours Haakon, but on the BMSK range the flash is part of the processor, which is why the guys reprogram with a BDM (a tool that connects to the programming/debug pinouts of the processor in order to flash a new image file onto the processor)
--- Quote from: Haakon on October 09, 2013, 03:10:41 AM ---I do not think there will ever be a copyright issue.
2 German firms (that I know of) do sell "modified" chips.
It would be very difficult to prove "they" just modified the original maps(s)
--- End quote ---
Actually not so difficult.. you read the Firmware from the chip and do a checksum/signature over the fixed portion (that does not contain learned or personal data like VIN etc)... if for a specific version these checksums do not match, then the firmware was modified...
--- Quote from: Haakon on October 09, 2013, 03:10:41 AM ---Development cost is minimal compared to the risk doing so.
IF a (GS911) remap failed a owner would be "stranded" with a dead bike.
My guess is BMW would refuse to even try help...
--- End quote ---
I agree... and the even worse is letting a user decide on custom values... fueling is one thing.. but timing is a completely different kettle of fish...
However, if the bike is out of warrantee, I see no reason why the owner could not / should not be allowed to mod the vehicle...
best,
Stephan
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