I'm looking to get a wideband o2 sensor/controller installed real soon (for rtek tuning) Where should i have the bung welded? Ive done some searching. Lots of talk about x amount of inches from dp and whatnot. That's useless to me b/c i have an N/A. What distance from the header inlet should the bung be welded for an accurate reading and durability (from heat). Thanx in advance!

 

You want it before any cats, clocked above 9 and 3 on the pipe. try to get it as far back as you can.

I run my wideband in the stock location in my header, but had to run a heatsink to keep the sensor from overheating all the time.

 

"36 inches away from exhaust opening and 9 o'clock to 3 o'clock

 

thanx

 

stock lacation would work out fine.

thats where i have mine.

 

stock location kills the sensor. It's only good when you have plenty of sensors to burn up.

 

I'm planning on running the stock narrowband in the stock location, so that wont work for me....plus everyone says that putting a wideband there will destroy it in no time.

 

Mine is ~30" from the turbo, in the 10 o'clock position, with a copper plate heatsink. Works perfectly. No overheating errors at all.

 

Im thinking about putting the bung on the "rear rotor exhaust tube" right before it merges with the front tube (collector).....I measured this to be about 28" from the where the header bolts to the engine.

 

If you put it there, then you're really only measuring the AFR of the rear rotor. You should put it after the collection point.

 

No, you want it where it collects both exhausts. Probably a footish or more from the stock location would be. Just put it on the down pipe and you'll be fine. Yes you can buy a copper heat sink some where else.

 

Why clocked above 9 and 3?

The O2 Sensor bung on my RB header is at 9 O'Clock, just after the collector before the flange to the Presilencer/Main Cat.

 

^^ Just so water doesn't touch the sensor for sure. But I prefer 11, that's just me.

 

Yeah, the clocking is to avoid any condensation that might build up and damage the sensor. 6 o'clock is the worst location, so higher up is better.

 

Thanx for all the input guys. I'll put in on the collector part where both tubes meet.

 

My only concern about mounting it where the 2 pipes collect is that its really far back. You t2 guys have 1 pipe coming off your turbo whereas i have 2 pipes that collect into 1 right before the catback portion of the exhaust. i understand that putting the bung on one of the 2 header pipes might skew the overall afr reading, but wouldnt having it mounted so far back do the same thing? Ideally i'd want 2 bungs/sensors... one for each rotor with 2 gauges, but that seems kinda crazy......lol
i plan on using a heatsink regardless of where i decide to put the bung

 

It's not going to give you inaccurate numbers if the sensor is further down the exhaust system. The manufacturer recommends 36" from the ports to keep the sensor from dying in the high temperatures, but you could stick it further down too.

 

You are right. There is a slight timing differential, that is all you need to be aware of. The numbers will be accurate.

 

Thanx guys! If having it a little further back is not an issue, ill just have the bung welded at the collection point.

 

That is probably best, and will insure the sensor stays cooler.