Exhaust/techlusion R1200ST

[RamblinBoy]

I'm headed for a slightly overdue 12,000 mile service this week or early next week. I have done my homework through the search feature but still have a couple of questions.

 

1. Does the latest Dobeck/Techlusion work like a power commander?

 

2. Is it programmable throughout the range - i.e., can it be programmed to both add or subtract fuel as needed?

 

3. Will it remove flat spots in the power curve when adding aftermarket exhaust?

 

4. Anybody know of a dealer in the Southeast who is willing and able to do a proper job of install/tune/dyno test?

 

My riding buddy's warmed up Boxer Cup pulls me by a little bit and it just...Well, it hurts me, that's all.

 

Love this R1200ST and hope I'm not facing too much of a hassle when I try to get the brake judder problem cured at 12k checkup.

 

Thanks to all for this great forum.

[Firefight911]

Not going to comment on the Techlusion, however; the rotor issue is well documented and should not be any issue with your dealer. Just make sure you get new pads as well.

[Aether]

I don't have a TFI on my BMW, but I did have one on a former bike. The TFI can only add fuel, not take away. You configure it to add fuel at idle, low load cruising and high load throttle. You cannot do fine tuned adjustments across the range like you can with the Dynojet - but then again, you don't need a dyno or computer to set up a TFI - theoretically it works just like a traditional carb where as the different adjustments are like adjusting your mixture screw, main jet and needle jet sizes (but again, only adding!). I eventually switched to the Dynojet on that bike because I did indeed need better control across the range because there were areas where the mixture was too rich at higher RPMs.

[R4ND0M_AX3]

There is no dynojet solution for hexhead bikes. I've asked dynojet twice.

[RamblinBoy]

Thanks, all, for the responses. I'm off on my first real, sure enough By-God BMW tour. Leaving the Panhandle and headed up to Dillard, GA, then to Charlotte, Raleigh, and, if time and weather, etc., permit - Roanoke, home by the Coast to Savannah,, then to me own garage. Should be fun. Had the 12,000 service done, all set.

[Don_Eilenberger]

There is no dynojet solution for hexhead bikes. I've asked dynojet twice.

I can understand that - since there should be no problem on a hexhead bike..

 

BMW put in a MUCH faster computer, dual O2 sensors and dual knock sensors - all fast enough to do active tuning on the engine. There is no surge. I can't detect a flat spot, and if you put on a less restrictive exhaust (hard to imagine there really is one..) - the dual O2 sensors should compensate for it without any problem.

 

So - the reason for no "solution" is they probably can't think of what the "problem" is.. mine runs just perfectly (especially compared with my '04 R1150RS - even with a Techlusion.)

[grasslander]

Rapidbike 3. You get full control across the entire RPM range. If you put a better flowing exhaust you can probably get some benifit from tuning above 4200 if you use the o2 sensors and accross the entire range if you disconnect the sensors. I've been planning to purchase one for sometime to play with cleaning up my mixture.

 

Other priorities have been sucking that $500 away this year. I agree that the new computer on these bikes does an admirable job keeping things good for stock as well as my full remus system.

[R4ND0M_AX3]

There is no dynojet solution for hexhead bikes. I've asked dynojet twice.

I can understand that - since there should be no problem on a hexhead bike..

 

BMW put in a MUCH faster computer, dual O2 sensors and dual knock sensors - all fast enough to do active tuning on the engine. There is no surge. I can't detect a flat spot, and if you put on a less restrictive exhaust (hard to imagine there really is one..) - the dual O2 sensors should compensate for it without any problem.

 

So - the reason for no "solution" is they probably can't think of what the "problem" is.. mine runs just perfectly (especially compared with my '04 R1150RS - even with a Techlusion.)

I don't think the hexhead uses wide band O2 sensors. So it only knows that it is rich or lean but not how rich or how lean. This is fine when targeting an air/fuel ratio that is stoichiometric. However under heavy load stoich is not the ideal for power. Systems that use narrow band O2 sensors usually switch from closed loop fuel control to open loop. During open loop the O2 sensor(s) are ignored. It's the open loop operation that can benefit from tuning when engine configuration/breathing ability is modified.

 

 

I think there is no "solution" from DJ because

1. Demand is not there because, like you mentioned, there is no surging issue that most were trying to fix on the older bikes.

2. DJ doesn't off any solutions for dual O2 sensor equiped motors.

[DoctorC]

Dan:

 

.... It has been too many years since my last chemistry class, and I have had no engineering classes at all...

 

"under heavy load stoich is not the ideal for power. Systems that use narrow band O2 sensors usually switch from closed loop fuel control to open loop. During open loop the O2 sensor(s) are ignored".. WoW!!!

 

...I need a translator!

 

I replaced my stock exhaust and now have a hybrid...Staintune-- header/collector... with a LeoVince can. I cannot detect any flat spots from 4K up. I would like to believe it runs better than stock. It does sound better...

 

Steve C

NJ