| Author | Message | ||
     Smoke4ndmears |
Finally got around to re-installing this with a longer harness. Being the first to do this was an interesting process. The results are fantastic.      | ||
| Motorhead102482 |
What is the tuner supposed to do exactly. How does it tune? I see some ECM hook ups. Looks like a lot of wire splicing. What's the advantage to something like this versus say an Erik Buell Racing race ecm? | ||
| Mountainstorm |
Being a geek I recognize the PC-type molex connectors...those don't like moisture at all... I guess as long as you protect it from rain and wash water they'd hold up without corrosion. Is it a data logging tuner or something? | ||
| Rodrob |
Info here- http://www.afrtuner.com/description.html | ||
| Smoke4ndmears |
Thanks Rodrob. Motorhead -just like the Power Commander the Motty utilizes a wideband o2 sensor to determine a correct fuel mixture and subsequently intercepts and adjusts the fuel injection pulse width to achieve a target AFR. The Power Commander for the 1125r is not a dual wideband setup though, but the Motty is (with addition of an innovate LC1). The advantage over the Erik Buell Racing ecm is that an autotuner will adapt to any changes to the bike to include filter, exhaust, timing, fuel type etc. The motty also has a built in data logger which is a bonus. | ||
| Highscore |
From my point of view any "autotune", featuring WB-probes, has in the case of the 1125 an essential problem: The stock position of the probes inside of the header is too close to the exhaust. Therefore the WB probes becomes to hot and operates outside of its working range. This may not be be problem for partial load, but at WOT, a WB-probe like the Bosch LSU-4.x, is simply unable to produce a valid signal for residual oxygen due of the heat by the exhaust gas stream shortly after the exhaust port: Beyond 750° C the output is just freakish. | ||
| Smoke4ndmears |
Highscore I concur. The next step for me will be to move the sensors downstream. Something a little further than the 09 position. It's easy to specify what regions to exclude from injector control fortunately. | ||
| Motorhead102482 |
Thanks for the clarification. Sound like a good idea, and keeps you from having to rebuild maps all of the time. How do you know how far to go with the O2 sensors? Is it possible to get too far away from the engine? | ||
| Smoke4ndmears |
I think the recommended is around one meter, but I notice from some pics I have of the Erik Buell Racing bikes that they have their sensors near where the kink is on the stock bikes (though the header design on the RR is waaaaaay different than stock). You can get to far away, to the point that between engine pulses fresh-ish air can be pulled back into the exhaust and over the sensor. |
