(05-04-2016 12:29 PM)Ulvetanna Wrote: I guess I don't need one since it would be inconceivable to ride my CB1100 around with the engine at 1500 RPM, lol. But I would strongly suggest doing a dyno run and get an A/F ratio chart to make sure the engine isn't running LEANER at higher RPMs, which is of course not very good for it. Not very good at all.
The ECU goes to a default map when you install this thing, it has no idea what to do, and cannot make changes in real time based on the exhaust.
The following would suggest that the O2 Sensor does not provide real-time data to the ECU at higher RPM and that it is primarily to assure EPA compliance at idle and low RPM:
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How Does An o2 Eliminator Work?
The O2 sensor which is installed in the stock exhaust systems of motorcycles are used by the Manufacturer to adjust the fuelling in order to pass the emission tests for street homologation.
This is done only in a very limited RPM range under certain load situations. The intention behind it is not to improve the performance of the machine. It's aimed to reduce the emissions of the engine in the specific RPM/Load situations which are tested during the homologation process.
This can result in delayed throttle response or unsteady power delivery. If you replace your silencer or exhaust system or fuelling, it's suggested to remove the installed sensor and replace it with this eliminator.
The eliminator simulates the signal given from the O2 sensor under optimal A/F ratio conditions. This allows the bike to run under best performance conditions.
If you install an aftermarket exhaust, remove the catalyst, install a power commander or perform similar modifications we strongly suggest installation of an O2 sensor eliminator for the best performance of your machine.
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Ulvetanna,
Do you have evidence to support your view and that the use of the O2 Sensor Eliminator WITHOUT the use of a Power Commander or ECU Reflash might be dangerous?...Because, there are a lot of CB1100 owners running these Eliminator plugs, and ALL have noticed a marked improvement in drivability. Are the typical PCV charts for the CB really adding much fuel in the upper RPM ranges?