The New 1170 cc Twin "Hard Numbers"

[Dr. Curve]

Here are a few of the things on the way. Take a look at these numbers.

New dimensions in dynamics, agility, riding pleasure and safety.
* Excellent off-road qualities, plus on-road features, enhanced to an even higher level.
* A reduction of 30kg (66 lbs) in weight has been achieved by incorporating intelligent lightweight construction and the use of high-strength materials.
* A new 1200cc flat-twin power unit, with balance shaft, delivers supreme smoothness.
* Torque and output are increased by almost 18 per cent.
* Fuel consumption has been reduced by eight per cent.
* Highly advanced, newly developed engine electronics and the latest emission technology provide optimum environmental compatibility.
* A quieter exhaust system but with a more throaty sound.
* A new, six-speed gearbox with superior operation, excellent running smoothness and easier gear shifting.
* A newly developed lightweight Paralever with weight-optimised driveshaft.
* A new and lighter Telelever for even greater precision in front wheel guidance.
* Extra-rigid running gear for supreme riding safety, outstanding directional stability (up to top speed), superior handling and unprecedented line-following through bends.
* Ultra-strong, cast light-alloy wheels (cross-spoke versions are available as an option).
* The latest electronic development ensures fewer cables and less weight.
* Electronic immobiliser fitted as standard.
* Comprehensive after-sales backup features a wide range of equipment and tailor-made accessories are all to BMW's traditional high standard.


Things I like.
the crank is 9% lighter
100Hp at 7000 RPMs
85 ft pounds torque at 5500 RPMs
36/31 valves
73/101 stroke and bore
small battery (14 amp) amd small alternator (600 watt) and smaller starter weight 4.9 pounds less thanon previous 1150 units
Transmission Ratio 2.28
dry wt 199K max carrying wt 425K (2.135 base wt to weight carring capacity ratio)
0 to 100 kmh 3.4sec
stnding Km 24.7 sec at 208 Kmh
telelever is a light forged aluminium component
telelever support tubes increased to 41mm from 35mm
trans weight reduced to 28.7 pounds and requires a oil change only every 25000miles
nine (9) liter airbox
sequential fuel injection
8% more fuel efficient
fuel range 91 to 95 RON without any adjustment

And much much more..................Can you believe what kind of S we will eventually see?! Count me in. Best,

[GUS]

I think BMW are gonna be selling alot more units in the next few years.I wonder if the styling will be radically changed on the new S?I love seeing the concept bikes at the shows,but they either never make production or are too watered down.
gus

[UberXY]

Doctor: do you think we will see an electronic throttle mechanism replacing the traditional cable set up? I have the electronic non-mechanical throttle set up on my BMW car (M5) that uses a very fast electric motor to open the 8 butterfly valves. Seems like a good application for a GS - we have all been stranded some time or another by broken throttle cables.

[Joe]

Uber

Cost & weight for a motorcycle would be ridicules.

[VetteRacer]

Cant wait to start hearing details of a new S. I have been anxious to hear what the new KRS is going to turn out to be. Now the anticipation is worse with 2 new possible bikes!
With power like that from the GS, the S should be where the K is at now, what will the new K be like? AWWW THE WAIT!!!
Matt

[roger albert]

Agreed, No way we'll see that on a bike anytime soon. Don't get me wrong, it works great on a car, but I dont' see it happening here for the reasons Joe mentions and more. In fact, I don't think you'll see it on any system that doesn't measure airflow. It's not fault tolerant then. You can lose a TPS and run fine, even on a non-metered-air system because you control the butterfly directly. The car is relatively protected and they can live with the elec throttle. But on a bike with no airflow metering, losing the elec signal for the throttle would allow no limp home mode. Joe's reasons are likely the primary ones though. Did I mention I'm jealous of guys with M5s. I'm not a real car guy, but the only one I ever drove about turned me around. I'm pretty sure my next car will be a used M3 or M5. Nice.

[repoe3]

but dont forget that motoGP bikes are throttle by wire. the aprilia suffered greatly because their system was not ironed out. apparently that was a requirement in the motoGP series or just allowable. i forget, but kenny roberts, senior, was interviewed over on amasuperbike.com and he was commenting about it and how it doesnt really help in the moto world yet, let alone racing. but the trend in somethign like motoGP is to develop and trickle down technology to production, nothing that anyone here doesnt already know.

repoe3

[brad black]

throttle smottles. the new bmw cars don't use then, simply varying cam lift and duration to control rpm and load as required. keep up ladies.

i do the gs tech training end of feb, so i'll get the corporate cock rammed down my throat then. nice list of improvements doc, bet it all adds up to the same bucket of over marketed bmw **** tho.

i can't wait till the new k training when they'll try to tell us how they've bested 35 years of ujm development in one foul swoop.

[blakebird]

http://www.motorcycledaily.com/15january04_bmw_r1200gs.htm

quite a long article....still all press release material, but lots of it!
--

"Featured in all BMW Boxers (with the exception of the 850-cc power units) since 2003, dual ignition has been further modified and improved in the R 1200 GS. The auxiliary spark plug is now arranged at the outer edge of the cylinder, the ignition timing of both plugs being freely programmable and possibly varying in time as a function of load and engine speed in order to further optimise running smoothness, emission management, and fuel economy. Referred to as phase shift, this adjustment process is maintained consistently all the way from part load to full load.

In practice this means different ignition timing points on both spark plugs in defined control map areas: When approaching full load where dual ignition no longer provides any benefits, the phase shift effect is so large that the spark crosses over on the auxiliary plug in the expansion cycle (60° aTDC). For all practical purposes this corresponds to single ignition on the central spark plug under full load. "

[smallj]

How will some of the new engine technology affect our ability to bolt on mods to the boxer engine? The anti-knock, spark plug modulation, O2 sensors all over the place might make it better stock than with a bunch of bolt on mods which just serve to screw up the technology.

Thoughts from the Techie - Tuner crowd?

[The Sea Dog]

Originally posted by UberXY
we have all been stranded some time or another by broken throttle cables.

Hey Uber

I have to say that . . . ( like anyone is interested in what I have to say anyway ....)

A) I've never been stranded by a broken throttle cable, ever. If it does brake you can always swap the close cable over ;-)

B) I really don't fancy that on a bike, as it's too complex, too vunerable, not neccessary and not developed enough ( look at the problems the RSCube had ) and basically just not required.


Long live the Cable I say.

Cheers
PAul

Keep it sticky side down.

[Firebolter]

I've given this some thought and my experience in enduro/CC racing is that the least amount of electronics, the better. Of course on road is alot different, thats a given, but simplicity has it advantages. I just remember my electronically controlled power valve failing 20 miles into a 100 mile enduro and I had no power band in the top cause the valve wouldn't open, so I went back to KTM's from the yamaha I had. you can repair a cable in the boonies much easier than a electrical problem.....not to mention the trouble shooting aspects of electrical vs. mechanical for idiots like me....There is nothing worse than a "every so often" electronic problem that is sporadic vs. a hard mechanical failure that is readily apparent.....

[Eron Flory]

Originally posted by smallj
How will some of the new engine technology affect our ability to bolt on mods to the boxer engine? The anti-knock, spark plug modulation, O2 sensors all over the place might make it better stock than with a bunch of bolt on mods which just serve to screw up the technology.

Thoughts from the Techie - Tuner crowd?

I think it will be good. Air flow sensing might be better but you can't have everything... The knock sensor will help keep detonation under control if you get some fuel that isn't optimal. This is always a concern when increasing the performance of an engine running pump gas. The sequential fuel injection will make the mapping with a PC3 or similar device easier as you will no longer have to factor in the multiplier that is needed now to account for the injectors firing every revolution. The fact that the injector will no longer fire when the intake valve is closed should help emmisions, fuel economy and power.

Brad,
When I went through the first R1100RS training class in 93 the instructor lectured us on how dual plugs only cause problems and only people with insufficient understanding of the system would think otherwise. I bet the company line is a littl different this time around... I feel for you having to put up with that attitude.

Eron

Eron

[roger albert]

Yeah, that seems to be a German engineering charcteristic. There is only ONE way to do something (SO macht man das).
Nevermind that that one way is different this year than last, and the opposite from the year before that. Try studying engineering there and you'd really get an earful. It was informative and very educational, both in terms of the tech, and the mindset. I loved it, but was often pretty annoyed by it. If you think engineers in the states are anal, or maybe a lot of Germans in general, just try German engineers -- or worse yet, German engineering professors. Yikes.

[roger albert]

And yeah, I believe the sequential injection really helps the emissions (and to a lesser degree power) Nothing like shooting the fuel into the intake tract and then waiting a revolution to let the atomized spray condense and burn less completely. This is as big of a step as discrete O2 sensors. In fact, in a twin (with widely spaced events compared to higher cyl count motors) I'm not sure one would get nearly the full benefit of either one (sequential and dual lambda) without the other. It's a major step forward.

Eron, what are you thoughts on adapting the PC. I know the mapping trick is no longer required, but do any of the current PCs allow/support individual injector control (or at least two?)

[Eron Flory]

I don't know of any of the PCs that allow individual injector control but you could always run dual PCs (one for each cylinder) if you really wanted to control each cylinder individually. I wouldn't expect to see any big gains here unless you would be compensating for the oil mist from the crankcase vent which BMW ussually shoots directly into on cylinder.

With the sequential firing should allow Dynojet's tuning link system to do most of the tuning automatically which is not the case now with the RPM difference between what the engine is really running RPM wise and what the PC thinks it's running (engine RPM x 2).

Eron

[roger albert]

So, are you saying that current PCs do or don't fire the injectors at the same time?
I'm not clear on this.

[VetteRacer]

In the V8 world I live my other life in... Sequential injection has emmisions and fuel consumption benifits at any level. Power isnt really helped untill around 500HP. You will start noticing little gains around there, with a really good tune.

I am suprised that BMW wasnt running sequential to begin with. Its only 2 cylinders! My Vette motor ran a 2-batch fire, 4 cylinders at a time would get fuel, one of those needing it...

As long as BMW hasnt made the tuning features of the new system real hard to get to and manipulate, then all the new stuff will either benifit or make no difference to the MOD market.

Matt
Looking forward to hearing more on the new motors...

[markjenn]

Shifting gears a bit, did you guys catch the discussion of the new "bus" electrical system? Sounds like it's basically a LAN.

I like the idea (I hate dealing with the huge wiring bundles on our current bikes), but wow, I'm skeptical that BMW can get this right on the first iteration or two.

- Mark

[GUS]

Markjenn,
Is that similar to the system ducati have used on the 999?Cuts down on wiring for engine managemaent systems.A couple of wires can now do most of work.Fibre optics will be used no dout in the future.
gus