O2 Optimizers for M1100 with Siemens ECU

[koko64]

I checked both Smartmoto and PC sites. Powercommander no longer sell the O2 Optimisers in the kits, probably due to the action against them from the EPA a while back. I guess finding vendors with old stock of the Optimisers is the way to go.
I also note that Smartmoto are now only providing their O2 eliminators for non Marelli ECU's at around 40 bucks. It might explain the high price of the Spanish product for Marelli ECU's.

[koko64]

Anyone know of a US vendor that may have old stock O2 Optimisers?

[Dirty Duc]

Anyone know of a US vendor that may have old stock O2 Optimisers?

My understanding of closed loop fuel injection, though sometimes disputed here, is that O2 sensors are of basically two types. A wideband sensor requires math (and thus a processing unit=chunk of hardware) while a narrow band sensor doesn't. A narrowband sensor seems like the appropriate technology for bikes (that have relatively free restrictions from Euro/American cars).

Seemingly, the only effect of the O2 optimizer is added resistance so the ECU provides a smidge more fuel than the map should ask for. essentially shifting the point in Closed Loop to the left and up.\

Given the curve on both wideband and narrowband sensors, probably your resistor is relatively standard.

Obviously, I don't have one laying around to test, but IME there is little to no variation on relatively stock automotive parts.

[Dirty Duc]

Also, a wideband sensor can be told to output a narrowband sensor curve. The narrowband sensor curve is pretty abrupt and non-useful.

[koko64]

Testing O2 Eliminators at present (made by Smartmoto). Strangely, these are currently more plentiful than O2 Optimisers in todays marketplace. Dynojet and other companies like Smartmoto in Greece and Bazzaz USA are making O2 Eliminators rather than Optimisers. Could it be that the Eliminators are more clearly justified for track use as per the caveat on their packaging rather than an Optimiser that actually interferes with the function of O2 sensors?


Smartmoto claim the Eliminators allow the ECU base map and PCV to take over in open loop form. Testing so far is very positive with surge free response, more precise throttle control and much stronger, smoother acceleration. No CEL, Sensor or plug fouling yet either. We shall see if the devices are detected by the ECU or able to seamlessly integrate into the system.

[koko64]

So far so good. After over an hour of riding no CEL so if it's time it should be ok. Didn't quite cover 100kms so we'll see on a longer ride. Runs better that's for sure.

[koko64]

Another good effect is that the bike can run a thousand rpm lower in each gear without the previous snatchiness. It's still on the lean side of good AFR, but isn't ridiculously lean anymore as I saw the reserve light come on at 185kms with 3.5 litres to go. Must have been having fun.
 

[koko64]

Did over a hundred mile trip through the mountains with Nibor the other day. No CEL light so I think it's all good. I think some dyno time may be needed however.

[koko64]

Dyno tune completed. Each cylinder mapped.
PCV, WASP Intake kit, O2 eliminators, exhaust valve eliminator, Termi slip ons with DB killers.

100 dynojet hp or 91 Factory Pro hp . 10% variation. I find that funny.
The Monster Evo had a smidge less peak hp and a little more mid range than my Hyper Evo with almost identical mods bar an open Termi 2 into 1 full race system. The Hyper had O2 Optimizers so the Monster is smoother down low with totally open loop.  Otherwise almost identical power and torque. The Hyper had stronger bottom end torque and I'm attributing this to the 2 into 1 exhaust.  WASPWORKS are done, but fear not, you can get a Corse Dynamics or Beast R kit to achieve the same results.

[Howie]

Nice

[koko64]

Just a shout out to Dean at Dynoverks in Boronia, Victoria, Australia. Great job and good engagement with my plans, listening and documenting my feedback about how the bike was running, the level of performance work and the kind of tuning characteristics I was looking for.

[koko64]

Did some back to back tests with another 2013 M1100Evo. This customer bike was stock but for Termis, DP ECU and DP filter kit. I noted crisper and more civilized bottom end response with the customer bike compared to mine. I suspected the Exup valve assisted here, so I also tested the Smartmoto Exup valve deactivation device Vs the stock Exup  operation.

The Exup valve gave more response right off the bottom but created a hesitation in midrange response much like a CV carb. While it smoothed out the torque at low rpm, it created throttle lag when asking for power with larger throttle inputs. Deactivating it gave a much more direct connection between throttle input and response from midrange up to high rpm. This reminded me of the characteristics of flatslide Vs CV carbs. As expected, exhaust noise was also better controlled with the Exup valve in operation.