Has anyone fitted a Wunderlich power commander

[comberjohn]

I've read that they make a big difference to the K1200/1300 across the frame fours as well. Wish I'd known about them when I had the K1600GT. Might have made it a much nicer bike to ride, particularly in town.

 

[Roger 04 RT]

I still run my original Innovate LC-1 and run at 13.5:1 between that and re-powering the coils to connect directly through a relay to the battery (not through the key switch), I've got a very smooth, very responsive bike.

The AF-XIED will work as a modifier for any four-wire O2 sensor. The key conditions are: that the heater circuit has +12V switched on by the key circuit and that it remains on (BMW bikes that use the BMSC ECU don't have always-on +12V, but a user can even make that work with a +12 tap); that the input to the ECU is expecting a signal that varies between 0-1 volts and can reference to ground; and that Nightrider has an adapter cable that matches the physical pinout of your O2 (although it's not to hard to adapt without the physical OEM connector).

What the LC-1/2 and AF-XIED do, is to create an output signal that looks just like a stock narrow band O2, with the exception that it switches (meaning goes from 0V to 1V or 1V to 0V) at a richer mixture than stock. The ECU then goes to work aligning fueling to the richness of the modified O2 sensor.

An analogy would be that you had an apartment where the landlord put in a thermostat that only worked at 18C so that he saved on heat in the building. You then came along and took out that thermostat and put in an adjustable version and set it to 21C, where you were more comfortable. The O2 sensor is a "thermostat" for oxygen level in the exhaust. The catalytic converter is happiest at the stock setting, but you are happier at a richer setting.

 

[Bendy toy]

I still run my original Innovate LC-1 and run at 13.5:1 between that and re-powering the coils to connect directly through a relay to the battery (not through the key switch), I've got a very smooth, very responsive bike.

The AF-XIED will work as a modifier for any four-wire O2 sensor. The key conditions are: that the heater circuit has +12V switched on by the key circuit and that it remains on (BMW bikes that use the BMSC ECU don't have always-on +12V, but a user can even make that work with a +12 tap); that the input to the ECU is expecting a signal that varies between 0-1 volts and can reference to ground; and that Nightrider has an adapter cable that matches the physical pinout of your O2 (although it's not to hard to adapt without the physical OEM connector).

What the LC-1/2 and AF-XIED do, is to create an output signal that looks just like a stock narrow band O2, with the exception that it switches (meaning goes from 0V to 1V or 1V to 0V) at a richer mixture than stock. The ECU then goes to work aligning fueling to the richness of the modified O2 sensor.

An analogy would be that you had an apartment where the landlord put in a thermostat that only worked at 18C so that he saved on heat in the building. You then came along and took out that thermostat and put in an adjustable version and set it to 21C, where you were more comfortable. The O2 sensor is a "thermostat" for oxygen level in the exhaust. The catalytic converter is happiest at the stock setting, but you are happier at a richer setting.

Fabulous information, Roger. Do you have the circuit for the ignition coil power supply mods. Where do you switch the relay and which wire is which at the coil?

Hey we'll be fitting exhaust gas temperature probes next and adjusting fuel on the fly.

 

[Roger 04 RT]

Here's the link to powering the R1150 dual spark coils through a relay instead of from the key: http://forums.bmwmoa.org/showthread.php?79888-R1150RT-2nd-Load-Relay-for-Twin-Spark.

Not needed on the R1200 which powers each coil from the BMSK separately.