General Category > General Discussion
Engine Remaping
WarthogARJ:
Guys and Gals,
I have an HP2 Enduro 2006.
I added an Akropovic full titanium exhaust after I robbed my bank when I first got the bike (2nd hand).
Is MUCH lighter, plus no catalytic converter, so the engine is potentially a bit more powerful due to less pressure drop.
I bought thru HPN, who had a hand in the HP2 design.
They say it DOES add more power, and doesn't need any engine re-mapping (see attached).
It does pop a bit on the decel, but have had it since early days, so am not sure how much this is normal on the HP2.
BMW also sells both the Akro muffler individually for the HP2, as well as the complete Akro system.
So it's not an unusual modification.
I now see some others say it's even better to remap your ECU to compensate, but I don't know much about this sort of thing.
Anyone have input on the best thing to do?
I believe I can:
- leave it as is (arguably I'd be safer with LESS power....:-}
- possibly adjust my existing setup without any extra chips etc: either thru the dealer or someone else
- go to a specialist with a dyno who can then remap my ECU (I think they all add a chip).
MaxBMW in the USA does this, as do a few guys in the UK, plus others in continental Europe
- buy a system from someone like Wunderlich or DynaTune that adds a chip, plus allows you to tune via various "maps", or even "on the fly" by adjusting some settings
- other more dubious sounding ways, including adding a mystery module (that seems to be just a 20k resistor) from a company that sounds like it also sells "Snake Oil" and Hair Regrower...:-}
I read claims that with an engine remap/controller I can adjust to my style of riding, as well as my air filter and exhaust system.
And possibly use even lower octane fuel if forced to (rides in Africa etc).
And yes, even regrow my hair...:-0
This is perhaps not directly related to the GS-911, except that the real time sensor potential gives you outputs you can use to tune your bike, if you add the Wunderlich or Dynatune system.
This Forum has some experienced people on it, and maybe others have gone this route?
Thanks,
Alan Jarvis
StephanT:
--- Quote from: WarthogARJ on September 16, 2013, 02:27:50 PM ---Guys and Gals,
I have an HP2 Enduro 2006.
I added an Akropovic full titanium exhaust after I robbed my bank when I first got the bike (2nd hand).
Is MUCH lighter, plus no catalytic converter, so the engine is potentially a bit more powerful due to less pressure drop.
I bought thru HPN, who had a hand in the HP2 design.
They say it DOES add more power, and doesn't need any engine re-mapping (see attached).
It does pop a bit on the decel, but have had it since early days, so am not sure how much this is normal on the HP2.
--- End quote ---
do us a favor and do some realtime log if you can, on the Lambda voltages... in general, if you are backfiring on decel, chances are that you are running lean... and lean is hotter..., and lean is possible, since you've taken out most of the restrictions that are normally found in the stock exhaust... (hence more air)
--- Quote from: WarthogARJ on September 16, 2013, 02:27:50 PM ---I now see some others say it's even better to remap your ECU to compensate, but I don't know much about this sort of thing.
--- End quote ---
It generally is... have a look at what we did with a G450X when they just came out:
http://www.hexcode.co.za/products/gs-911/evaluating-the-g450x-with-leovince-x3-and-powercommander-v
and then
http://www.hexcode.co.za/products/gs-911/evaluating-the-g450x-with-full-akrapovic-system-and-powercommander-v
--- Quote from: WarthogARJ on September 16, 2013, 02:27:50 PM ---Anyone have input on the best thing to do?
I believe I can:
- leave it as is (arguably I'd be safer with LESS power....:-}
- possibly adjust my existing setup without any extra chips etc: either thru the dealer or someone else
- go to a specialist with a dyno who can then remap my ECU (I think they all add a chip).
MaxBMW in the USA does this, as do a few guys in the UK, plus others in continental Europe
- buy a system from someone like Wunderlich or DynaTune that adds a chip, plus allows you to tune via various "maps", or even "on the fly" by adjusting some settings
- other more dubious sounding ways, including adding a mystery module (that seems to be just a 20k resistor) from a company that sounds like it also sells "Snake Oil" and Hair Regrower...:-}
--- End quote ---
I'm not a big fan of the snake-oil solution...
Do you have links for the other solutions so we can read what they claim to be doing...?
--- Quote from: WarthogARJ on September 16, 2013, 02:27:50 PM ---I read claims that with an engine remap/controller I can adjust to my style of riding, as well as my air filter and exhaust system.
And possibly use even lower octane fuel if forced to (rides in Africa etc).
--- End quote ---
probably only if you remap it everytime for which ever situation you want... By just remapping (and not adding anything else), I can't see how they can optimize supreme power on the one hand and low octane performance on the other hand... ( a wideband lambda would be handy here)
--- Quote from: WarthogARJ on September 16, 2013, 02:27:50 PM ---This is perhaps not directly related to the GS-911, except that the real time sensor potential gives you outputs you can use to tune your bike, if you add the Wunderlich or Dynatune system.
--- End quote ---
Any specific links to these?
best,
Stephan
bikecrazy5:
hi
i agree with Stephan.first check your real time values as it definitely sounds like you running lean. IF you decide on going the for a remap i would go for the power commander v as i have worked with it before and have seen the results.but that's my 5 cents
Haakon:
I "think" this is what he refer to:
I guess he think of the powercommander products?
The company have changed its name several times.
http://www.powercommander.com/powercommander/powercommanders.aspx?mk=2&mdl=78&yr=2009&pc=12-010&mk-n=BMW&mdl-n=HP2&pc-ver=PCV&add-mdlyrid=12-010&add-mdlyrid2=12-010&fullstr=12-010&prod-type=Powercommander V
Started by Mark Dobeck- firm sold and now he have this firm:
http://www.techlusion.com/
(I am sure you (Stephan) remember the "Fuelnanny" that partly solved the surging issues of early F650GS models)
----------
Wunderlich:
http://www.wunderlich.de/shop/catalogsearch/result/?q=tuning
-------------------
MY personal opinion:
Most modern bikes are so finely tuned that small alternations like a new exhaust do not improve performance much. You may get more bottom end power, more high end power but not both.
The advanced ECU`s will most often adapt to alterations and the bike will be back to "normal".
No harm and little gain in overall power.
A redesigned intake system, exhaust AND/or new cams will do it- with new ECU mapping.
A new map (or chip) is a must... add on electronics will not be able to override the OEM ECU.
(The OEM ECU is adaptive and will, over time, supress most ad ons.)
I THINK the "Powercommander" come with a new, wide range, Lambda. (not for all models)
That will make a difference!
Is it worth the price??
Smiles, from a stupid Haakon
WarthogARJ:
Hi guys,
EXCELLENT Feedback: thanks.
I'll use the GS-911 to check the real time values and see if my popping/backfiring can be sorted out.
My terminology is not correct: I used "remapping" as an overall term, when I should have said "improved" or "optimized".
What HillTop Motorcycles say they do is add an interactive routing into the BMS K module that adjusts the engine management using the sensors: lambda and airbox sensors. I've seen good feedback from the work on the forums and from other posts. And my local BMW dealer service manager says he has sent bikes there, and noticed improvements in performance and fuel economy.
I'll dig up the various forum links that comment on it.
The HillTop site does not say that much: Geoff said it to me on the phone.
The main comment is that the bike is set up for average conditions, and to comply with emission requirements in various countries. That might not be the best for your own use.
Akro exhaust: HPN says that adding this full exhaust improves te power and torque curve: I attached the dyno curve from them on an HP2 Enduro. They helped design the HP2, so I would believe them. They also say you do not NEED to do any remapping.
I'll report back with more details.
Thanks!
Alan
P.S. The "snake oil" comment was about a device called the PowerFrk that was discussed on some forums.
http://www.powerfrkusa.net/
And I call it "snake oil" because someone opened one up and says that all it was was a resistor: nothing more complex.
I can post those comments if you want.
It seemed a bit dodgy to me.
But who knows, maybe it's a excellent product.
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