Installing Wideband O2 Sensors in OEM Header

This is an old post, which I updated recently.   DynoJet has the WBCX module with two wideband o2 sensors that provide WB data to the PVCX/PV3.  I wanted to keep my narrowband o2 sensors so that I could remove the wideband after I optimize my tune.  This required locating new bungs in the front and rear exhaust, which is easier said than done in the OEM header.

Rinehart Slimline Duals, makes this easy since they already have the 12mm and 18mm bungs installed.  But since we are using the OEM header, the 18mm bungs needed to be located.

Since this will be a temporary installation, only used for tuning purposes, the position of the sensor really does not matter.  Condensation will not be an issue for the purpose of tuning.  When I'm done tuning, the wideband hardware will be removed and I will install o2 bung plugs.  The following photos show the exhaust locations that I chose to weld the new bungs in.

I am sure I could have located the front cylinder o2 up under the 12mm o2 sensor, but it would have been a very tight fit.  This would have been ideal though.

Here's the rear exhaust showing the 12mm and 18mm bungs installed

Here's the front exhaust showing the same

Checking clearance with the wideband o2 sensors installed (Rear)

(Front)  This one was very tough to locate

Here's the exhaust headers installed with the wideband sensors.  The heatshield covers up the rear o2 sensor (not installed yet).

o2 sensor wires wire tied to the narrowband sensor wire

The WBCX module located beside the VCM under the seat.  I pulled power from an unused connector.  It happened to have switched +12Vdc and Ground.