| Author | Message | ||
     Buellrobot |
I'm trying to get Megalogviewer MS 3.3.02 working with my '02 X1 – I've opened my log files and loaded my msq map, changed Field Naming (ECU) to "Buell" and set the Y-axis as "TPS-8 bit". When I click on the VE analyzer, I get the error below. I thought that the X1 had all the required components to do tuning, out of the box – am I mistaken?  And here's a broader view, in case it's useful:  Any help is appreciated, as I'm a total newb with this tuning software. | ||
| Pash |
I would just use the Field Naming as Megasquirt. What did you log the data with? PalmSpy? PCSpy or MonoSpy? I am guessing MonoSpy, in which case you want to set the Y axis to 'Load'. See how you get on... Feel free to email the log file and maps over if you still have problems. | ||
| Buellrobot |
Bingo! Thanks Pash. I was logging w/ MonoSpy, so setting to Load took care of it. I'm surprised that the docs on Gunter's guide don't mention this. I've been using this thread and ecmspy safe tuning as my primary guides. Now that I've got the VE analyzer open, the Default AFR map has 14.7 in the lower area, 13.9 in the mid area, and 12.5 in the higher throttle/RPM zone. Since I'm just using the normal O2 sensor, should I just set it all to 14.7? For anyone else who wants to try tuning an X1, I've found this discussion helpful too. | ||
| Pash |
The coolest thing about MonoSpy (and why everyone should have a copy) is that you can log (LC-1 and other) wideband data on the same timebase as ECM data. The tuning guide V2 was written before MonoSpy became available and it was written to give you an understanding of how the ECM worked and the best way to tune with it. I think the tuning guide tells you that with the stock O2 sensor, you are limited to tuning the CL and CLL areas, with any success, due to the sensitivity of O2 sensor characteristic to temperature effects. I have always wondered how Buell set the maps up originally; you are probably aware of the OL and OLWOT factors, 1.05 and 1.1. Working on the principle of of lambda=0.9 for best power, these can only really help you if the base map is set to give you 14.7:1, however for this AFR, the ignition timing needs to be further advanced to optimise, and this will in turn have an effect on the strength of the blowdown pulse at EVO and hence cylinder filling. With these complications, the sound advice would be to fit WB sensors and tune using them for the OL parts of the map | ||
| Alfau |
WB sensors ? Now in layman terms please? | ||
| Pash |
Wideband O2 sensors. Lots on t'internet about them, so best not embarrass myself here with my own explanation ;o) | ||
| Buellistic |
Wideband means FINE TUNING in OLD SCHOOL TALK ... | ||
| Buellrobot |
Xopti suggests this for the VE Analyzer AFR table settings, based on the default Narrow Band O2 sensor on an X1: "set CL area to 14.7... set the rest to 13.2 and hold on with a grin." So I'll give that a shot. Once I've experimented with this stuff more, I may write up a guide, if anyone's interested. | ||
| Pash |
Two problems here... 1. You only have an O2 sensor in the rear header - however do you think you are going to tune the front? 2. The stock O2 sensor is a narrow band sensor which was designed as a switch for AFR control for correct catalytic converter operation, it will not measure AFR accurately. Rather than attempting to re-invent the wheel without the correct tools, have a read of the tuning guide on the ECMSpy site and let the authors know what is missing. | ||
| Buellrobot |
@Pash – From what I've read, one can do some basic tuning on the rear cylinder, copy the map to the front and add 5-10% across the board. Also, it appears that plenty of Buell riders have had noticeable positive results tuning on the stock O2 sensor. Maybe not as good as getting wideband lambda sensors for both the front and rear header, but better than not tuning at all (and far more accessible). The ECMspy guides haven't been updated in years and aren't really designed as step-by-step as I'd prefer. I can ping them to suggest an update, but don't think it'd hurt to make a guide here. I would include references to all the people/places I've gathered information, so people can explore on their own. That said, first I need to log some rides and see if I can get any positive results out of tuning with these basic tools. | ||
| Pash |
I think you have been misinformed if you think you can just copy the rear map to the front and add 5-10% as it does not account for the volumetric efficiency / speed differences between front and rear cylinder. I thought the tuning guide had flow charts in it. What more does one need for step-by-step? As for not updated in years, granted it doesn't cover DDFI3 (as the author doesn't own a DDFI3 bike), but what has changed for DDFI (X1) and DDFI2 since it was written? I am not saying don't have a play, but I would hate you to think that you will enhance the performance of your bike by following the basic tuning guidance you have found. You are more likely to make it worse... Have a look at the flow charts and methods, I am sure there is one for a single NB sensor. | ||
| Alfau |
(Message edited by alfau on April 09, 2013) |
