Hood exit o2 sensors

[Wavvyjd]

First time putting a single turbo in a car and Im finishing up my build but ive ran into a problem/ need some advice on what i need to do for this car to run properly, i dont have a dont pipe that can fit up to my stock exhaust so i plan to run a hood dump for now, how should i have my o2 sensors setup, i have two bungs in the manifold and one hood dump pipe, am i able to run single bank fueling with this?, and im running a t4 divided twin scroll turbo if that makes any difference, any advice is appreciated thank you!!

 

[Jern54]

My hood exit pipe has 2 O2 sensor bungs.
That in combination with single bank fueling it works fine.

 

[daddyw00d]

i only have 1 oxygen sensor in the hood dump with single bank fueling. codes for after cat sensors turned off.

 

[N54_Sauce]

I know this is an old thread but I’m about to run a hood exit exhaust on a single turbo n54. Will this throw off the tune? I have a custom tune and the up pipe has only one o2 bung. Before I go and put it on I want to make sure I do it the right way.

Thanks

 

[JohnDaviz]

The right way is to have a pre (primary) and post cat (secondary) o2 sensor installed.

 

[N54_Sauce]

So I should get another bung welded on the hood exit. How far apart should they be from each other?