2WheelDynoWorks - ECU flash - Review Thread

Thats a stock hp number, everyone else is getting at least 8-12 hp from Nel's tunes. Alot of people getting 148-149 with the right exhaust. Could it be the Remus dragging it down or have they calibrated their dyno lately?

Nel's tunes have been much higher than that for every fz-10 Ive seen so far. Have you called Nels?

Here is my dyno. I'm about 5hp below advertised and extremely rich. AFR at the bottom. The argument can be made that dyno hp numbers can differ dyno to dyno but the AFR does not lie. I ended up purchasing a Rapid Bike fuel management system as well as the Can-Bus My Tuning unit (wide ratio O2 since 2WDW flash disabled the stock O2 sensors). The Rapid Bike system has AFR auto tune  and to get to a true 13.2 AFR it's removed as much as 17% of fuel in some parts of the rev range. I can honestly say that the bike runs even better not running so rich, the top end pulls all the way to the limiter stronger than before. I used to get 80-90 miles to the tank, but after correcting the fuel I'm at 110 miles before hitting reserve. I plan to be on the dyno again in a couple weeks to see the difference in power and AFR.

My honest recommendation for folks looking to reflash- get 2WDW to unlock all the goodies like lower fan temp initiation and removing factory limitations, but keep the stock fuel map and even O2 sensors, and then run a Rapid Bike, which will use the stock O2 sensors and autotune your bike's AFR to what you want (for example 13.2) regardless of what mods you have. It'll account for elevation, temp, exhaust, airbox mod, etc.

Don't take my post as anything negative towards the 2WDW flash. Nels is a good guy who does a great flash, but short of a fuel controller with auto tune (bazazz, power commander, rapid bike) or having *your* bike tuned on the dyno, a mail-in tune built off the same model bike across the country will only get your fueling so close since every bike is different. For many, the reflash alone will suffice if it's "close enough" but I encourage y'all to get a pull in on the dyno to see how close you get to a proper AFR or power figure.

Thanks harry76, my understanding is when doing a dyno run, you are WOT, meaning your graph should target ~12.5-13.5 AFR readings.
Mine is in the 14-14.5 in the lean range during WOT.
I'm not overly concerned about it, again just curious what other 2WD folks are seeing on their local dyno run sheets.
Interesting to see latte was incredibly rich! Just the opposite to mine. (so many variables to consider)
I really wish I did a stock baseline run...but I was too impatient over the winter with my upgrades

And since the ECU is now locked to 2WD, I might actually do a road-trip ride down to 2WD in the summer to get them to do a proper tune on my bike. They really are great guys to deal with.
Shipping it from Canada<->USA is a pain in the butt...had to do it twice already since the first flash broke the cruise control...the $ for shipping and having customs take their time (2-4 weeks) figuring out what to do with the ECU.

I sent my ecu in twice because I had a stumble when cracking the throttle open and Nels was able to mostly remedy it by adding a little more fuel. My afr therefore may be a little richer than others. Every bike is different, I know a guy with the same tune and he had no stumble whatsoever.

I just did a local Dyno baseline after having Nels flash, just to see what the #'s were and mostly the A/F ratio.

Interesting, I don't have a reader yet so I can't check mine but I did ask Nels if the diagnostic port issue was also fixed when I sent my ecu back (~Feb 1st) to have the cruise control fixed and he replied: "Yes. 100%."

Thanks danyboy.

MrHix

I noticed the biggest power difference in the ~4.5k-5k rpm range where the bike responds immediately to throttle input and takes off even in std mode. Before the flash, it felt like it was a flat spot in the power band around that rev range and would take a bit for the power to come on. And once I'm up in the 9000 - 11000 rpm range I'm just holding on for my life because it just hauls like a freight train.

I'm curious about what you said regarding loss in low-mid range power. I felt that was where the bike had the biggest gains and I have no problem passing people on the highway in 6th gear just rolling on the throttle. I wonder how others feel.