Why would you use an expensive widenband to do 0-1V closed loop? Having another bung works out to be the cheapest in the short and long runs.

 

Your wrong, I don't think you understand. Your way is the most expensive and has no benefit.

The UEGO unit has one sensor but the control module outputs two voltage curves, 0-1V and 0-5V, as I stated. This means you do not have the PITA and expense of removing parts to weld on a bung. The factory sensor is replaced with the AEM unit. One output of 0-1V goes to the factory ECU, which eliminates any problems from it. A second output of 0-5V goes to a read-out or the EMS for wideband use. Below is a quote from AEM website:

The AEM Wideband UEGO Controller has a very low current draw, and features both 0-5v calibrated output, and 0-1v calibrated output to mimic the factory narrow-band sensor, eliminating the chance of a factory computer issuing a trouble code.

Now, maybe I misunderstood you, please explain how removing parts, welding another bung on and having two sensors is cheaper or better in any run?

 

I think you have it right. The AEM controller is one of the few that is fairly easy to get dual outputs from to pull that off. The AEM also happens to be one of the cheapest but doesn't come with a display of any kind. I believe AEM is coming up with a cheapie display like the FJO to spit out a Lambda or A/F value.

Mark
www.Quantum-Racing.com