| Author | Message | ||
     Buellrobot |
I got hooked on Buells after my step dad let me use his X1 whenever I was visiting (he's in Oregon, I'm in NYC). So I eventually hunted down a very similar X1 (his is purple, mine is white) and bought the hell out of it. My X1 is a fun ride, similar throaty roar, but it lacks the get up and go that the X1 in Oregon has. The purple bike feels like it wants to wheelie in 1st, 2nd and 3rd gears—my white bike feels significantly more tame. I figure it might be that my ECU is junky —it's a "Total Fuel Systems" (pic below). While the purple bike has stock ECU. Or the purple bike is somehow geared lower. I'm going to count the teeth on my pulleys when I get a moment. However, the top speed feels pretty similar on both bikes. My question here is: is the weirdo ECU on my X1 making it wimpy? Any suggestions on how to deal with it (i.e. should I go stock, not worry about it, try to mess w/ the POTs, get a different custom ECU, etc)? Thanks in advance!  | ||
| 01x1buell |
well in my opinion( i could be wrong) i owuld get rid of that efi control module and buy ecmspy and burn the race maps onto the stock ecm.. then you can tune anything that you want. | ||
| 01x1buell |
and also dean,, you are close to nj,so you might want to check out njbuellowners.com we meet for rides alot and all great buell guys.. i am from pa and these are great fun guys. | ||
| Jramsey |
"My question here is: is the weirdo ECU on my X1 making it wimpy?" Yep | ||
| Jramsey |
Here's why piggybacks don't work well with DDFI This from the Ecmspy tuning guide and explains how the early fi works. "The Adaptive Fuel Value is how the Buell automatically compensates for changes to the environment, eg riding up mountains, or swapping the exhaust silencer. It is not perfect, but does a good job to compensate for minor changes. When the bike is ridden in Closed Loop mode (explained next) the ECM monitors the O2 sensor and learns the appropriate AFV value to apply to the fuel maps. This AFV value is applied across the entire fuel map range, hence it is critical that this is accurate. AFV values can vary from 80 to 160% but should be kept between 90 and 110% whenever possible. The AFV can be your friend, fine tuning the bike to suit your location, or it can be your worst enemy! If you setup the bike on the dyno for maximum power across the range, you will probably aim for 13:1 – 13.5:1 Air :Fuel ratio. If you then go for a ride and enter closed loop mode, the ECM will reset the AFV to maybe 80% to reduce fuel and try to get the default 14.7% AFR. When you next accelerate hard at full throttle, your perfect map as setup on the dyno will now be running at 80% of your values hence weak!" | ||
| Buellrobot |
Cool, thanks for the feedback! I just ordered an ECU cable from Al at American Sportbike. I did a semi-extensive search and didn't find a clear description of how the whole thing works—does anyone have a link to a good resource for modding the stock ECU? Also, how do I get the software, now that it's not on their website? | ||
| Snowbees |
www.ecmspy.com, read the tunning guide. | ||
| Buellrobot |
Ok, so I actually just started to look into where this piggyback was connected and realized it goes into a cluster of wires between the cylinders. Trying to figure out how to remove this thing.  | ||
| Buellrobot |
I'm going to take it apart this weekend, but if anyone knows what I should be expecting... and if might need some kind of different wire harness to remove this thing, it's much appreciated.  | ||
| Jramsey |
You'll have to remove the fuel tank to get at the injector connections,hopefully the connections look like this and not the early style that were hard wired to the harness.  On the left is the ground lug, middle the O2, on the right is the F/R injector connectors. | ||
| Buellrobot |
Awesome, that's super helpful to see. So if I unplug this stuff, will I need some kind of stock harness to replace it with? Or am I just decoupling the piggyback plugs and re-plugging the originals back directly into their sockets? The bike is an '02, so I'm hoping that they used the newer style. | ||
| Jramsey |
"Or am I just decoupling the piggyback plugs and re-plugging the originals back directly into their sockets?" Yep, probably take about 30-45 minutes to do the job including removing/reinstalling the tank. | ||
| Buellrobot |
Pulled that sucker out the other day and it made a noticeable difference in the oomph department. Thanks for the guidance! Now to figure out ECMspy... | ||
| Buellrobot |
Did a TPS reset and loaded a custom ecu image (another webber had the exact same bike setup and was nice enough to send me his image). After these things (and tearing out the piggyback), the bike runs SO MUCH BETTER. Thanks to everyone here who helped troubleshoot me through the process. | ||
| Nwrider |
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