R1200 GSA Remapping

[Bendy toy]

I'm intending to replace my 08 Adventure exhaust system. Downpipes are sorted but planning on stacked twin cans at the back (but that's still only plans).

When the new system is fitted should I get the engine remapped and will I need any resistors or whatever on the O2 sensors? I'm assuming that without the catalyst it probably should be set to run on a weaker mixture. But what do I know?

 

[seahorse]

Hilltop remap recommended by anyone that has had it done I am sure. About £350 though. Power Commander cheaper but untidy and not very weather proof.

 

[Schtum]

I'm assuming that without the catalyst it probably should be set to run on a weaker mixture. But what do I know?

You've got it the wrong way round. Without a cat' it will run leaner and should be remapped away from being dangerously lean.

 

[lennythelion]

Just get it re mapped by Hilltop anyway.Instant transformation.

 

[ghost-rider]

You've got it the wrong way round. Without a cat' it will run leaner and should be remapped away from being dangerously lean.

This isnt right due to the fact that the lamba sensors are before the cat, by removin the cat it simply "un-corks" it, fuelling wont be affected in atall, it just allows the gases to escape quicker!

 

[Schtum]

This isnt right due to the fact that the lamba sensors arw before the cat, by removin thw cat it simply "un-corks" it, fuelling wont be affected in way!

As it says in my sig....

And for all those folks who think their fuel injection is more intelligent than it really is.....*CLICK*

It's a link - *click* on it.

 

[ghost-rider]

As it says in my sig....

And for all those folks who think their fuel injection is more intelligent than it really is.....*CLICK*

It's a link - *click* on it.

Whats that gotta do with what i said?????? if the cat was before the lambas and then you take out the cat, then it would affect fuelling, but the cat is after the lambas, so it wont make any diffrence, your simply taking out what can only be described as a restriction!

 

[cookie]

i believe the lambda sensors only control the fueling at low revs.

 

[Bendy toy]

AFAIK the lambda O2 sensor makes sure the engine runs at the stoiciometric air fuel ratio (lambda point) which is actually a bit rich for an ideal burn. But the unburnt HCs drive the catalyst so the tail pipe should be clean.

But cat engines usually burn 5 to 10% more than properly tuned non-cat engines and a rich running engine not at its best for power or economy. The trade-off is that cats are supposed to be cleaner than non cats. Its conveniently forgotten that folks still commit suicide using fumes from catalysed petrol engines so how good are they really?

I asked because removing the cork might have made the engine run lean enough to not need a remap or be lean enough at times to cause damage. But as @lennythelion says its best to remap anyway.

More money but at least it will have an uncorked exhaust.

 

[ghost-rider]

AFAIK the lambda O2 sensor makes sure the engine runs at the stoiciometric air fuel ratio (lambda point) which is actually a bit rich for an ideal burn. But the unburnt HCs drive the catalyst so the tail pipe should be clean.

But cat engines usually burn 5 to 10% more than properly tuned non-cat engines and a rich running engine not at its best for power or economy. The trade-off is that cats are supposed to be cleaner than non cats. Its conveniently forgotten that folks still commit suicide using fumes from catalysed petrol engines so how good are they really?

I asked because removing the cork might have made the engine run lean enough to not need a remap or be lean enough at times to cause damage. But as @lennythelion says its best to remap anyway.

More money but at least it will have an uncorked exhaust.

The remap is a personal choice thing, yes the bike will run smoother etc. but dont be fooled into thinking its essential, especially when removing the cat, by removing the cat your only increasing the poisonous gases coming out of your exhaust not altering your fuelling or making it dangerously leaner as peeps are saying

 

[Pukmeister]

Narrow band sensors, with a limited amount of air-fuel curve correction.

 

[Sgt Bilco]

I'm intending to replace my 08 Adventure exhaust system. Downpipes are sorted but planning on stacked twin cans at the back (but that's still only plans).

When the new system is fitted should I get the engine remapped and will I need any resistors or whatever on the O2 sensors? I'm assuming that without the catalyst it probably should be set to run on a weaker mixture. But what do I know?

You don't need to as long as you aren't running straight through pipes. When you get to that stage, it's advisable to get the fuelling looked at.

I run Keihan headers, straight through end can and a PC3 which is a brilliant set up on my 06 ADV. I had it dyno'd and mapped for low town torque and it would pull a bloody house down.....

 

[skywalker]

If you fit a freer flowing exhaust system the bike will run even leaner (weaker) than the standard set up, so there is an even greater risk of long term engine damage ie burnt valves, pinking, valve heads dropping off etc
The best solution is to get the bike remapped by someone who knows what they're doing unlike some of the cheaper aftermarket solutions.There's no doubt it improves things.
However there are a couple of downsides to this - 1) If your ecu fails you've lost your investment as the control unit replacement is a dealer fix only and they will install the standard setup.
2) The above remap invalidates the warranty if your bike is in warranty.
In the real world there's nothing wrong with the standard exhaust set - most folk buy an aftermarket system for the sound.

 

[Pukmeister]

If your ecu fails you've lost your investment as the control unit replacement is a dealer fix only and they will install the standard setup.

In my understanding (and correct me if I'm wrong here), the investment in dyno time and the resulting adjustments are saved on the PC at the dyno centre as well as being flashed in to your ECU. If you have a replacement ECU fitted, it should be possible to revisit the tuning centre and get the new ECU flashed with the old saved map, without the need for another extensive dyno session.

 

[skywalker]

In my understanding (and correct me if I'm wrong here), the investment in dyno time and the resulting adjustments are saved on the PC at the dyno centre as well as being flashed in to your ECU. If you have a replacement ECU fitted, it should be possible to revisit the tuning centre and get the new ECU flashed with the old saved map, without the need for another extensive dyno session.

That may be true depending on who you have used but correct me if I'm wrong here but given what's in a ecu they may be different variables in the chips etc between the original "mapped" unit and the replacement leading to different engine readings. The "remapper" sets the bike up with what's currently fitted at the time. Obviously the amount of dyno time isn't going to be anything like before but its still somebody's time that's taken up.
However when Micky fitted a full Akropvich system to his X country his first point of call was with the original mapper to see if it needed tweaking. It wasn't required but could have been and again that's tying up someone's time to sort out an issue that has arisen, which in this day and age I'll be surprised if they do it for nowt.

 

[technotony007]

Whats that gotta do with what i said?????? if the cat was before the lambas and then you take out the cat, then it would affect fuelling, but the cat is after the lambas, so it wont make any diffrence, your simply taking out what can only be described as a restriction!

good point ... totally agree

 

[Schtum]

good point ... totally agree

I suppose it is your prerogative to be wrong.....

 

[ghost-rider]

I suppose it is your prerogative to be wrong.....

How the fook can it be wrong when its right in front of you

 

[Schtum]

How the fook can it be wrong when its right in front of you

Quite easily, it would appear.

 

[technotony007]

I suppose it is your prerogative to be wrong.....

I suppose Ignorance is Bliss too .....


T