Where to add O2 bung on headers?

Senna-F1 · 03-26-2019, 12:41 AM

I just received Motordyne headers. Before I send them out to get ceramic coated by Swain Tech, I need to add 1 or 2 bungs for a wide band.

Where is the best place for doing this? I have no idea how these things will hang, or what interference I might have if its in the wrong spot.

I put some numbers so you could give me your opinion. Should I just add 1 or 2?

Thanks!

fork · 03-26-2019, 06:58 AM

You want to weld on the bung on the downstream side of the collector so it would be near 6, 7, 8. From your picture, I'm guessing that's the driver side header. You will need to weld them between the 2 and 3 o'clock position because space is tight below the car (so opposite side from 9, 10, and 11). If you weld them any higher than that, there is a good chance you won't be able to get your O2 sensor in the bung.

I attached a picture of where I had mine welded on. I actually welded mine on the exhaust pipe because there was minimal room on my headers. Ignore my ghetto heatsink...

I would recommend putting one bung on each side so that you can monitor each engine bank.

Senna-F1 · 03-26-2019, 05:53 PM

Thank you fork! My gauge will only monitor 1 bank though. Is it common to have 2 wide bands? This will be supercharged on Ecutek.

fork · 03-26-2019, 09:20 PM

I am using an Innovate Motorsports DLG-1 which monitors and displays two AFR readings from two separate O2 sensors at the same time. I am certainly not in expert in wideband gauges but my guess is if your AFR gauge only displays one reading, you would only need one sensor (and one bung). I wouldn't put anymore holes in those nice headers than you need to.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Wideband bung location on ART pipes?	Kamillio	Forced Induction	7	09-07-2017 07:11 AM
Removing O2 sensor J extension bung on FI LTH	reynald3616	Intake/Exhaust	23	02-12-2017 01:18 AM
Extra Bung Necessary	37zeroZ	Intake/Exhaust	4	02-29-2016 05:53 PM
[FOR SALE] AAM Test Pipes with extra O2 bung welded in	Gregor12	Parts for sale (Private Classifieds)	7	10-24-2014 12:57 AM
ARF bung placement???	Kirkster	Forced Induction	22	06-22-2011 08:41 PM

03-26-2019, 05:53 PM	#3 (permalink)
Senna-F1 Enthusiast Member Join Date: Jun 2016 Location: Cary, NC Age: 53 Posts: 425 Drives: 370SC,EliseSC,MR2T Rep Power: 49	Thank you fork! My gauge will only monitor 1 bank though. Is it common to have 2 wide bands? This will be supercharged on Ecutek.

03-26-2019, 09:20 PM	#4 (permalink)
fork Base Member Join Date: Sep 2017 Location: Pittsburgh Posts: 49 Drives: 18 370 ST Blue Pearl Rep Power: 7	I am using an Innovate Motorsports DLG-1 which monitors and displays two AFR readings from two separate O2 sensors at the same time. I am certainly not in expert in wideband gauges but my guess is if your AFR gauge only displays one reading, you would only need one sensor (and one bung). I wouldn't put anymore holes in those nice headers than you need to.