12S Mapping question

[JoHNY]

I was wondering what the consensus on some sort of remap for the 12 is. Here in the UK there seems to be nothing available for my bike, for example a PC or TBoy.

I know some you guys have your 12 sorted so can you please advise. I have a straight through system (HPE can, Bos headers) and is standard apart from that. Not sure if it really needs anything as it runs fine although it may be running a wee bit lean.

So any advise will be much appreciated.

Cheers
Johny

[cageyar]

My R12S has a full Akrapovic system, K&N air filter and NGK Iridiums. The bike ran well but was obviously lean. Quite a bit of burble/popping on de-accel, and an occassional stumble when applying the throttle after slowing down.

I installed a Techlusion EFI module I bought for $249, model FI-1334ST. It came with settings for a stock bike and a 2nd set of settings for a bike with a full exhaust system and a non stock air filter. I set the module to the optional settings and 90% of the drama on de-accel is gone, no stumble on throttle application and, seat of the pants, feels snappier in the the mid-range.

It runs so good now I think a re-map would be unnecessay if one is even available. I should mention that the Akrapovic has bungs to retain the O2 sensors. The 1334 has leads that connect between the O2 sensors and the harness as well as the injectors.

[shreddr]

This is the only real "remap" as far as I know which is a rewrite of the ECU.

http://www.maxbmwmotorsport.com/power-package/

I have the Techlusion which works quite well, others have used the PCIII or RapidBike with equally good results, although they are a bit pricier. Some members here have used the FRK module which plugs into the air temp sensor circuit and richens up the mixture. No matter what you do it will improve the lean stock condition, and with your free flowing exhaust you actually "require" something.

[JoHNY]

Cheers guys, I just ordered the Techlusion from the US so it should arrive here in a week or two. Quite anoting really because the stealer told me I wouldn't need any kind of tune with the filter and exhaust. However, as I've found it really does need something to richen it up.

Btw Shreddr how is your new piston project going?

[shreddr]

Originally Posted by JoHNY

Btw Shreddr how is your new piston project going?

I hope you read the start-up thread!

Dyno Day, Shocking Results!!!

Have no hesitation about this upgrade, talk about the Dogs Bollocks!

[Rick Lee]

I have the full Remus exhaust and my bike gurgles very loudly on decel, sometimes with backfires that sound like gunshots. I thought that meant it was running rich. Sure smells rich too.

[cageyar]

Originally Posted by Rick Lee

I have the full Remus exhaust and my bike gurgles very loudly on decel, sometimes with backfires that sound like gunshots. I thought that meant it was running rich. Sure smells rich too.

There is no way a free breathing exhaust system and an air filter that flows more air causes a rich fuel condition, if you are referring to "rich" in terms of fuel.
I don't know if the Remus retains the O2 sensors, but if it does, there is no way your modification causes the application of more fuel, unless something else is malfunctioning. Not to hawk another forum but it came up quickly in a Goolgle search-I'm sure there are threads on this topic here as well:

http://www.bmwmoa.org/forum/showthread.php?t=22021

http://auto.howstuffworks.com/question257.htm

http://www.rx7club.com/showthread.php?t=175581

[Rick Lee]

Yes, my Remus retains the O2 sensors. I get 200-220 miles to a tank of gas, so I don't think it's running very rich, if at all. Probably just smells that way because of the lack of a cat. But I thought popping and gurglingon decel was a symptom of unburnt fuel being ignited after it had left the combustion chamber.

[peter f]

Well friends

PC V is out there (+ auto tune capabilities, similar to the ones available for that RB3 thing). Obviously the open PC policy (a US product) VS this nonsense RB secrecy (made in Italy)...MAKES ALL the difference

http://www.powercommander.com/powercommander/powercommander_iii_usb.aspx?mk=3&mdl=229&yr=2008


PS: 12S in model year 09? is it some kind of joke?

[cageyar]

Originally Posted by Rick Lee

Yes, my Remus retains the O2 sensors. I get 200-220 miles to a tank of gas, so I don't think it's running very rich, if at all. Probably just smells that way because of the lack of a cat. But I thought popping and gurglingon decel was a symptom of unburnt fuel being ignited after it had left the combustion chamber.

It is common for many high performance exhaust systems to moderately backfire or pop when the throttle is closed from mid-to-high rpm. The popping is a result of the air/fuel mixture becoming very lean when the throttle is closed and the engine is rotating well above idle speed. It is also necessary that the exhaust system have rather open mufflers for this to occur.

The combined effect of the closed throttle and elevated engine rpm is to create a fairly strong vacuum in the intake manifold. This vacuum, in turn, causes a high air flow rate through the small gap that occurs in the closed throttle body of an EFI system.

Under these conditions the fuel system cannot deliver enough fuel to create a normal, combustible air/fuel ratio. The mixture becomes too lean to burn reliably in the combustion chamber. It gets sent into the exhaust system unburned.

When the odd firing of the lean mixture does occur, it is sent, still burning, into the exhaust system where it sometimes ignites the raw mixture that has collected, the exhaust then pops or backfires

[roger albert]

But I thought popping and gurglingon decel was a symptom of unburnt fuel being ignited after it had left the combustion chamber.

What cageyar said. Actually, too rich or too lean, either one, to burn properly and consistently (every cycle) in the combustion chamber, will result in said mixture being ejected into the exhaust, and then ignited by the next burning fuel mixture that did get ignited and dumped in the exhaust.

Context here however, tells you which. They are lean from the factory, and the owner has made it still learner, so it can be a rich after fire (barring some other reason/failure/problem)

[shreddr]

Originally Posted by peter f

Well friends

PC V is out there (+ auto tune capabilities, similar to the ones available for that RB3 thing). Obviously the open PC policy (a US product) VS this nonsense RB secrecy (made in Italy)...MAKES ALL the difference

http://www.powercommander.com/powercommander/powercommander_iii_usb.aspx?mk=3&mdl=229&yr=2008


PS: 12S in model year 09? is it some kind of joke?

Tha link goes to a PCIII There doesn't seem to be a PCV available for the R12S

[JoHNY]

Having talked and read loads about this subject my understanding is; the bike is built to run lean and doing away with the cat will make it run leaner still. Therefore, you need to add more gas somewhere in the range. I know the TechL allows you to do that.

[shreddr]

Originally Posted by Rick Lee

I get 200-220 miles to a tank of gas, so I don't think it's running very rich, if at all. .

If you are getting 220 miles to the tank its not running lean, its running on air ! I get 40mpg at all times which at 4.2 gallons is about 165 miles, my light comes on before 120!

[Rick Lee]

I've never gone 220 miles before filling up, but my light usually goes on around 150 and says I have 60-65 miles left. Of course, as I get closer to 200, it says I have way less left than would get me to 220. But I do a lot of varied riding. Sometimes I'll go no more than 2-3 miles per day for a whole week, just riding around the neighborhood or to the gym and back. And sometimes I'll do a few hundred miles on just highways.

I have the Remus Ti headers, which I thought were supposed to turn blue. Is there a simple tool I can use to check my mixture, a gas analyzer, or does it have to be a laptop with fuel-mapping software?

[cageyar]

I have the Remus Ti headers, which I thought were supposed to turn blue. Is there a simple tool I can use to check my mixture, a gas analyzer, or does it have to be a laptop with fuel-mapping software?[/QUOTE]

What color did they turn?

[Rick Lee]

They're blue.

[cageyar]

Originally Posted by Rick Lee

They're blue.

I thought you meant they turned something other than blue.

You just need an adjustable EFI module.
As mentioned earlier in this thread, the Techlusion FI-1334ST is plug and play simple for an R12S. Set it to the optional settings and you will easily increase fuel delivery so the combustion burn is more consistent. That will minimize most of the popping and occassional backfire.
I paid $249 from:

http://www.customdynamics.com/motorcycle-performance-accessories/techlusion_fuel_injection_control_module.htm

[Rick Lee]

I need to have someone listen to it or take it for a ride. I just don't know enough about this stuff to properly diagnose it or even know if it's a problem. This bike feels light years faster than my GS and the powerband does feel pretty steady throughout.

[roger albert]

You don't need a laptop to know what's happening. In fact, even if you did have an addressable interface to the ecu, which you don't, you could only read the built in narrow band lambda sensor. A gas analyzer is the way to go, but we kinda already know what it will say, qualitatively (too lean) What you want is an adjustment/modification method (FRK/PCIII/Techlusion/etc) and an analyzer/dyno to monitor/adjust the results.