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Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,778
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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 |
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1984-911 M491
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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.
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1984-911 TLC......SOLD |
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Straight shooter
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Wideband o2 input allows the ecu to see if you're running lean or rich and will adjust mixture accordingly.
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“Of the value traps, the most widespread and pernicious is value rigidity. This is an inability to revalue what one sees because of commitment to previous values. In motorcycle maintenance, you MUST rediscover what you do as you go. Rigid values makes this impossible.” ― Robert M. Pirsig, Zen and the Art of Motorcycle Maintenance: An Inquiry Into Values |
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Registered
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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.
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RGruppe #79 '73 Carrera RS spec 2.7 MFI 00 Saab 95 Aero wagon stick 01 Saab 95 Aero wagon auto 03 Boxster 90 Chevy PU Prerunner....1990 |
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Join Date: Sep 2013
Location: Huntsville, AL
Posts: 621
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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.
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1986 911 3.2 Cabriolet "We all have a desire to create something that will show we were here. " Ferry Porsche |
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Location: Fresno, CA
Posts: 7,778
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Quote:
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. |
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Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,778
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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 - |
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Straight shooter
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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.
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“Of the value traps, the most widespread and pernicious is value rigidity. This is an inability to revalue what one sees because of commitment to previous values. In motorcycle maintenance, you MUST rediscover what you do as you go. Rigid values makes this impossible.” ― Robert M. Pirsig, Zen and the Art of Motorcycle Maintenance: An Inquiry Into Values |
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Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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Sherwood |
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Registered
Join Date: Jun 2003
Location: Fresno, CA
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Now, what to buy with the $150 I had allotted for the o2 stuff. |
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Brew Master
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Registered
Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,778
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Come on man, you're a Porsche owner. You know you have a list somewhere.
![]() True. I just placed my Pelican order. Included a few things I really don't need (but I want it). |
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