| Author | Message | ||
     Ferocity02 |
So I've been reading through a few threads of people who have done some tuning with wideband sensors. I would like to see who else has done this and whether or not it was successful. Awhile ago I attempted to tune my bike with a stock narrowband O2 sensor in each header pipe using ECMspy and MegaLogViewer. What I did was have the connector for each O2 sensor run under the seat, then I could simply plug in whichever sensor I wanted to log into the ECM. I would log data for one cylinder at a time, adjust the fuel map for that sensor, then switch cylinders, and repeat. I logged each cylinder ~4 times and was hoping to converge to a good fuel map, but every time MLV would lean out the top end, and richen the low/midrange. Overall, MLV added a LOT of fuel to each cylinder, enough to make my fuel economy to go down by 3~4 mpg. The bike didn't seem to run any better or worse, although it eliminated the decel popping by richening that area. In total, this method added 280 fuel points to the front cylinder, and 614 to the rear cylinder before I stopped. I have been running these maps for about a year now without issues, but would like to try again doing it the RIGHT way, the WIDEBAND way. So if anyone would like to share their experiences I (and others) would appreciate it. Please tell us what hardware/software you used, how you used it, how you liked it, how you collected the data (street/dyno), and the results. Thanks all! | ||
| Xl_cheese |
megalogviewer gave me the exact same results and I also had an 02 in each pipe. It makes the Closed loop region richer and the open loop leaner. Problem there is that by making the Closed loop richer the AFV goes down causing the open loop region to become even more lean. I didn't like it and didn't have good results at all so I quit. Being that closed loop always targets an AFR determined by the o2 sensor it seems more reasonable to use ego correction to manually tune each cyclinder. IE. Log the data an then watch the replay and see what the ego corr is for each square. Then tune that square so that the ego corr targets 100%. Only do this for the closed loop region. For open loop you'd need a wideband to target soemthing like 13.#:1 AFR | ||
| Buford |
Used WB sensors (F.A.S.T.)in both front and rear pipes-approx 11" from head outlet. Did 50 or so logs/maps with MLV and ended up with a very nice open loop map. Runs great in summer and winter and dont need to worry about AFV etc. Idles very nicely around 975rpms. Get about 52mpg. | ||
| Xoptimizedrsx |
i also have around 54 mpg everything is done with wide bands. there is many ways to set them up. the daul lc1 s on the street and nothing on the race bike. its set to no correction direct data feed. afr is set at 13.4 everywhere. just install them on a switch and run it through MLV. its not hard to do. with time and road work no dyno needed then. i do it both ways. on the dyno as the rpm goes up the afv drops to 13.8 but on the track or road it stays at 13.4. part of learning how its reacting to wind speed and load. afv locked. timing fixed no ramping or retarding. there is many things that can be done. the race bike is aprox 20 mpg. but it runs wot 95% of the time. mike | ||
| Xoptimizedrsx |
gasoline on the bikes afr set to 13.4 for best power. i'm 100% on this value. if on a dyno as posted above depending how the dyno is set . you have wind ,load,ade ect. that slow the transfer and speed of rpm that affect the afr. so a 13.8 on the dyno at 6500 rpm may be a true 13.4 at 6500 in 5th. as a wise man once said. I'm just saying! also fuel heat affects the afr and power. as fuel temp goes up afr changes as well as power. we are putting a cooler on our race bike to cool the fuel before injection. this helped on the dyno test on veriable fuel temps we tested at the same engine temp. so its a fact hot fuel sux. remember 13.4 for the bikes target afr best power. mike | ||
| Wantxbr |
Can you explain a little bit about target AFR please? | ||
| Buford |
How does one "enable" the wideband function in the later (2008) model XB's. Either ECMDroid or TunerPro..thanks! |
