| Author | Message | ||
     Johncr250 |
I met a guy who is really into BMW bikes on a ride today. He`s a BMW Tech and talked my ear off for about an hour regarding FI. He also owns a Buell X1 and said that the fuel injection system on Buells and BMW`s are very similar. He has done this on both his BMW 1200rs (i think) and his X1) I had never heard of this, but its supposed to be very popular with modified BMW`s (exhaust,airbox mods, cams and headwork) and that you`ll get 5-10 hp gains above and beyond the exhaust gains. This isn`t for stock engines. Ok here what he said: Disconnect the O2 sensor by unplugging the wire to the sensor. This will make the FI run in Open Loop mode continously and will richen the fuel mixture. This alone is worth 2-3 HP. But the real benifit this allows is the use of the Techlusion FI box (its called the Fuel Nanny for BMW`s) to adjust to your needs. Which on a bike with mods can buy you 5-10HP. He also went into alot of mumbo-jumbo about why the TFI box won`t work on Buells/BMW`s unless the O2 sensor is disconnected. Most of which i couldn`t understand. Anyways, I wanted to know what everyone thinks about this. He also gave me a site that explains it in more detail: http://faq.f650.com/GSFAQs/FuelNannyFAQ.htm#Can | ||
| Anonymous |
How to follow a BMW riders advice to the ruin of your Buell... If disconnecting the O2 sensor would buy you 10HP, do you think Buell would be crazy enough not to do it? | ||
| M1combat |
Emissions perhaps? I can't see ten HP unless as John said... There are numerous other mods. He only claimed 2-3 for the unplugging of the O2... I have a feeling this anony will be exposed... | ||
| Unibear12r |
At best unpluging the O2 just locks you into the maps for the last conditions it read. Go somewhere or big change in weather & a crappy running bike you have. You still have to use the O2 with whatever ecm you use but change the fuel maps therein. With no MAP/MAF or O2 on a Buell the ecm has no connection to external conditions. Does a BMW use both a MAP/MAF and a O2? Dropping the O2 wouldn't be so critical then. edited by unibear12r on April 26, 2004 | ||
| Court |
I have an F650, belong to the "chain gang" and unplugged both spark plugs. I am getting unlimited mileage. Still sitting at home though.....  | ||
| Buckinfubba |
court you make me laugh...hahahaha | ||
| Johncr250 |
Yes it sounds very strange to me too! I don`t plan on trying this anytime soon. Just passing along some interesting info. | ||
| Josh_ |
Well, you disconnect the O2 sensor and eliminate closed loop mode (and thus the brains of the ECM and all of Buells hard work to make it run right) then add in an aftermarket box to control the fuel. So, does Techlusion make a box for Buells? | ||
| Johncr250 |
I think they do? I seen the TFI box for sale on some of our sponsors sites. Basically he said the bikes ECM will override any FI box added (TFI or PCIII) anytime the bike is in the closed loop mode. So you can disconnect the O2 sensor which will allow you to set up a custom FI mapping for your mods. The downfall is your ECM will not be able to adjust to outside conditions, which was one of the great things about FI. | ||
| Johncr250 |
I don`t think its worth the tradeoff, but still food for thought. | ||
| M1combat |
Maybe for a drag racer that has a mobile dyno??? I think the race ECM would be a better solution. Maybe that along with a yet to be discovered mod to the O2/IAT setup that will allow us to adjust the A/F mix. | ||
| Unibear12r |
Or a closed race course & you have a lot of external equipment to determine the maps you need. Yes for now the race ecm is the only alternative to stock that sounds worthwhile to me. Good one Court- my KLR650 is my usual & current deadbeat. However it feels like its getting a VERY limited mileage to me.  | ||
| Captainplanet |
I have a techlusion 1040i box on my XB9r. I am still playing around with the tuning on it. You can definitely richen the fuel with it. The box will cause the check engine light to come on now and then. I still haven't had the time to really sort it out yet. | ||
| Johncr250 |
I talked to Techlusion Tech Dept yesterday. They have a new model coming out for the XB line (12&9). Its supposed to elimate the problems with the earier TFI box . It`ll be available in about two weeks. I`ll let you know when i hear from them. | ||
| Johncr250 |
I talked to Techlusion Tech Dept yesterday. They have a new model coming out for the XB line (12&9). Its supposed to elimate the problems with the earier TFI box . It`ll be available in about two weeks. I`ll let you know when i hear from them. | ||
| Fullpower |
WHY? | ||
| Misato |
yeah, they said it was almost out a year ago. | ||
| Captainplanet |
Yes, they are supposed to be working on one that has some sort of connection to the 02 sensor. Who knows though? | ||
| Pbjoel |
Hello, I would be very interested in a "Fuel Nanny" or WORKING equivalent for my XB12S. I've driven it for 3500 km and it feels like taming a wild horse. It surges, hick-ups, spits etc... between 2000 and 3500 rpm, only when trying to drive at constant speeds. Very, VERY annoying to say the least. When I pull the throttle every problem is gone. And that's what you get for +/- €14000 !!! = the same in $. Alternative?? That's the problem. Dunno!  PBjoel | ||
| Fullpower |
PB sorry its not running correctly. the TPS value setting is quite critical. you may wish to have the nearest dealer reset the TPS. also you can very easily check for trouble codes. look under seat, find 4 pin connector at right side of fuse box. this is the data link connector, probably has a plastic dust cap, and a peice of velcro on it.take a paper clip, or short piece of wire, short pins 1 and 2 together, turn ignition ON. trouble codes, preceded by a series of six rapid flashes, are indicated by by the count of one second flashes, with 2 second pauses between digits. all codes are 2 digits, multiple codes can be stored.example: 6 rapid flashes,2 second pause 1 second flash 2 second pause (3) one second flashes, 2 second pause. this means a trouble code of 13, pertaining to an oxygen sensor fault condition. check your codes if any, and any one here with a service manual can translate them for you. the bike is not designed to run poorly,so dont hesitate to correct the problem, it is possible to fix it. good luck. | ||
| Docrecon |
The 1045 is in test right now; I'm supposed to get one as soon as it's released. | ||
| Bigbird |
I'd be willing to bet that Techlusion is going to release a new box for the XB's that is similar to it's latest offering for BMW oilheads (called the "R259" ). The version for BMW goes inline between the O2 sensor and the ECM, and there is an additional pot on the unit to "attenuate" the O2 sensor signal. It also has the standard 3 pots of the previous versions and hooks to the fuel injection harness. I have no doubt that it works, but what pisses me off about Techlusions is the fact that they released 2 or 3 versions of their product prior to the R259 that did not connect to the O2 sensor yet they claimed it would still be able to add fuel in closed loop, which turned out to be a crock of shi+. The box would add fuel only if you disconnected the O2 sensor and ran the box in "control mode". If you left the O2 sensor connected and ran the box in "stealth mode" the O2 sensor would detect the richer mixture and the ECM would adjust accordingly. Every time Techlusion came out with a later version they claimed that the new one really works in stealth mode, and every time a new version came out many people shelled out their hard-earned cash only to find out it still didn't work as advertised. Only when Techlusion came up with the O2 attenuating pot did they finally deliver on an original promise made several years and at least a couple of versions of product earlier. I have trouble spending my money with a company like that. YMMV |
