What is the purpose/benefit of a wide ban o2 controller
 

I'm installing PMO ITB's and Electromotive setup. The Clewett Engineering site sells a "wide ban O2 controller" and states that it is a direct plug in to the electromotive.

I'm wondering why you would use this and it's purpose. Mostly for my own education.

Thanks

The O2 controller supports the O2 sensor which is the primary element in a closed loop control algorithm which manipulates the injector pulse length in an effort to maintain a desired set point.

Wideband o2 input allows the ecu to see if you're running lean or rich and will adjust mixture accordingly.

The wideband sensor, was introduced by NTK in 1992.

It has 5 wires between the control unit and the sensor. The thread size is urually 18mm X1.5 same as the older narrow band.

It is based on a planar zirconia element, but also incorporates an electrochemical gas pump. An electronic circuit containing a feedback loop controls the gas pump current to keep the output of the electrochemical cell constant, so that the pump current directly indicates the oxygen content of the exhaust gas. This sensor eliminates the lean-rich cycling inherent in narrow-band sensors, allowing the control unit to adjust the fuel delivery and ignition timing of the engine much more rapidly

This sensor is also called a UEGO (for Universal Exhaust Gas Oxygen) sensor. UEGO sensors are also commonly used in aftermarket dyno tuning and air-fuel (AFR) display equipment.

The wideband sensor has a signal range from 0 to 5 volts. The narrowband sensor has a range of 0 to 1 volt with .5 being ideal mixture.

Not meaning to get off topic, but do individual throttle bodies increase horsepower substantially? They look very cool, but also look very expensive. In my ignorance, I don't really know what they do.

I believe that Individual Throttle Bodies (ITB's) will add some horse power due to the fact that the engine breaths better. Each throttle body is about 2/3 the size of the single CIS throttle body so I will have 2/3 times 6 the air flow capability which is a 400% increase.

The earlier "S" cars had 200 hp with smaller engines and that is partially due to the fact that the mechanical injection had individual throttle bodies.

There is no doubt that this system is expensive. besides being beautiful, the engine management system (Electromotive TEC-gt) will enable me to tune my car to its absolute best and that will make it more efficient as well as more powerful. I had to save my pennies for a long time to get this system. I'll be starting my install in about a week.

Thanks for all the answers. I guess my real question is: if the Electromotive TEC-gt already comes with an o2 sensor, why does it also offer an "optional" o2 controller? Basically, what is the TEC doing without the optional controller and just the o2 sensor? It seems to me that it would be doing something with the signal from the o2 sensor but now has the ability to do more ?? with the controller.

Thanks -

What type of sensor does it come with when no controller option is chosen? A "narrowband" o2 sensor does not need a controller. You can even find the narrowband sensors as 1 wire ; just sensor output an no heater circuit built into the sensor itself. I doubt they include a wideband sensor unless you have the controller option selected; as you point out it wouldn't make sense to include something that can't be used. That would be bad for business financially. That's ~$100 part.

Yes. ITBs will add some power, mainly due to providing more accurately metered fuel closer to each intake valve, partially from the individual intake tract lengths that allow pressure waves to encourage/maximize air flow (rpm-dependent). However, unless using forced induction (i.e. supercharger, turbocharger), there's only so much atmospheric pressure that can fill the combustion chambers. Should be used with other engine mods.

Same as above. MFI engines are typically rated at +10 hp @ X rpm. The main power difference with early S engines is higher compression, more aggressive cams and larger valves and/or ports. Weber carbs also use individual throttles for each cylinder, albeit in one casting.

Sherwood

I just received my parts today and to my surprise, it came with a wide band o2 controller and sensor. I did not see that as part of the kit but it was included.

Now, what to buy with the $150 I had allotted for the o2 stuff.

It's like Christmas in July only it's June

Come on man, you're a Porsche owner. You know you have a list somewhere. :D

Come on man, you're a Porsche owner. You know you have a list somewhere. :D[/QUOTE]

True. I just placed my Pelican order. Included a few things I really don't need (but I want it).