O2 Sensors - Which Bank is Primary?

[NSX-Files]

I'm installing a dual channel AEM Wideband UEGO with the AEM EMS (30-1042). The EMS instruction manual designates pins D14 and D16 on the wiring harness as O2#1 (primary) and O2#2 (secondary) respectively. On the NSX, which bank is considered the "primary" O2#1 - front (cylinders 4-6) or rear (cylinders 1-3)?

Also, I confess I haven't taken a close look at them yet, but how hard is it to take out the D14 and D16 pins from the factory harness to insert the alternative wires from my WB O2 sensor controller? I only need to wire in these two wires, so I don't really want to buy the harness extension thing.

 

[NSX-Files]

Answering my own question - D14 is the front bank and D16 is the rear bank.

Still curious - how hard is it to take out the D14 and D16 pins from the factory harness to insert the alternative wires from my WB O2 sensor controller?

 

[chudson1549]

Answering my own question - D14 is the front bank and D16 is the rear bank.

Still curious - how hard is it to take out the D14 and D16 pins from the factory harness to insert the alternative wires from my WB O2 sensor controller?

Hi Dave
Is there anyway you could weld a bung to the exhaust. Then run a third O2?
I have this setup now when I dyno the car.

 

[NSX-Files]

Hi Dave
Is there anyway you could weld a bung to the exhaust. Then run a third O2?
I have this setup now when I dyno the car.

Hey Charles,
Actually today I had two bungs welded in the pipes between the turbos and the muffler. These will be for the dual wideband o2 sensors. I've removed the factory narrow band sensors from the header collectors since those won't be used. This way the ems will have more accurate A/F readings all the time even in the rich range. You just tell the ems that it's got 0-5 volt uego sensors instead of 0-1 volt regular sensors.