Question about running a bike without Lambda; Leads to ECU Tuning

[DuciD03]

Modified the title slightly, Originally this was a question about working around a broken lambda sensor (O2); which is integrated into ECU tuning and air fuel mixtures; the lambda is to help with emissions and efficiency.

Further posts below form some knowledgeable DMF-ers; there's some great tuning link references; jus make sure you have lots of time and mental energy...

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So, lambda sensor was snapped right off s2r 1K; so filled the hole with muff cement; and have been test running her without.

One thing noticable is the back shotgun exhaust is hot; on another s2r 800 I had the muffs (cans) never go that hot; infract I could always put my hand on the exhaust; does this have something to do with the sensor?; what's effected with it on and off? (how does it work?)  What would make the exhaust so hot?

[Speeddog]

Stock cans have catalytic converters in them, if they're getting fuel due to dodgy injection they'll get quite hot.

[DuciD03]

Stock cans have catalytic converters in them, if they're getting fuel due to dodgy injection they'll get quite hot.

ok similar to what I suspected; have some tuning software; but never set it up or used it; difficult to use? (Id drop into your shop, on a number of occasions, but its quite a commute ...north of 49th)

and ... Oh ya ... and also have a tuned ecu that says "race" on it; but not the termi cans; put back the stock cans ... but it was duc performance (DP) tuned; with spark mid pipe ... what  does that mean? And then would assume richer injector setting?

[Speeddog]

Why not install a good lambda sensor and fix the issue that way?

[greenmonster]

Or a dedicated plug?

"(how does it work?)"
Usually OEM ECU w Lambda regulates fuel mix up to 50% of max RPM to lower emissions, around A/F 14.7/1.

[DuciD03]

Or a dedicated plug?

"(how does it work?)"
Usually OEM ECU w Lambda regulates fuel mix up to 50% of max RPM to lower emissions, around A/F 14.7/1.

INTRERESTING; I'll have to goggle this; or you could explain here (the old fashion way...lol)

[beer]Cheers D

[stopintime]

http://www.ducatimonsterforum.org/index.php?topic=655.0

[greenmonster]

http://www.bikeboy.org/open_closed_loop_efi.html

[DuciD03]

Why not install a good lambda sensor and fix the issue that way?

http://www.bikeboy.org/open_closed_loop_efi.html

http://www.ducatimonsterforum.org/index.php?topic=655.0

! Ok-eeee; thanks for that; much info to absorb and understand! Something to be studied and understood before tinkering further. Mechanical stuff Iv always wanted to do, and understand, but have been afraid to ask ... after some "perusal-ing" of the info; for the short term ordered a lambda & used pipes ...lol.

As an aside; the 800 and under don't use a lambda; right? 1ks are using lambdas for gas  efficiency and emissions; right?

Maybe I should change the title to "Bike Tuning"

[BK_856er]

I think it's more model year/emissions compliance rather than engine size.  My '07 M695 has a lambda sensor.  Well, it did until I changed to a DP "race" ECU and removed/plugged the vestigial oxygen sensor because the DP ECU runs open loop at all times.

BK

[DuciD03]

I think it's more model year/emissions compliance rather than engine size.  My '07 M695 has a lambda sensor.  Well, it did until I changed to a DP "race" ECU and removed/plugged the vestigial oxygen sensor because the DP ECU runs open loop at all times.

BK

Interesting; learning all the time; the 800 with no O-2 lambda is a 2005; the 1k is a 2007 with a DP race ecu; don't know if the lambda is digitally programed out / removed or on an open loop; how to tell? do I need to hook her up to a diagnostic? Noticeable power difference according to those more experienced with the 1K.
Cheers D

[koko64]

A simple way to check is to unplug the O2 sensor and see if a CEL is triggered.

[DuciD03]

A simple way to check is to unplug the O2 sensor and see if a CEL is triggered.

- oooow -; WHAT is "CLE"? - lol -

[koko64]

Pardon, Check Engine Light on dash.

[DuciD03]

Pardon, Check Engine Light on dash.

- ooopefft! - thanks.