Wideband bung location

[fr0st]

Alright so I've been pondering the best place to put the sensor.

so far I've come up with right behind the flex section for the dp and have it routed up through the engine bay into the cabin OR right at the end of the dp before the flange and have it strung along side the exhaust into where the rear cat temp sensor comes up into the cabin under the passenger side seat.

What would be best?

Also I'm interested in where other evo owners have mounted their widebands. :thumbsup: So post up where you've mounted your wideband bungs and include pics if you can


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[CLuTZ]

bang it in where the 02 sensor goes

 

[to4garret]

i've read people putting it in the stock location seem to wind up with dead sensors more often than people who put them further down.

i went the side of caution and put my LC-1 infront of the flexi, but behind the sump about where the equal length shaft is. was heaps of room to point it straight up as well.

 

[CLuTZ]

i've read people putting it in the stock location seem to wind up with dead sensors more often than people who put them further down.

That wouldnt be from the use of leaded fuel would it?

 

[to4garret]

dont think so, but even if it was leaded fuel, it wouldnt really matter where you put the sensor.

something about the exhaust gas temperature seems to ring a bell, come to think of it, it was mostly people who drag raced a few bit.

 

[milkandoj]

Straight out of the innovate manual....
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Using a bung is the preferred method for mounting the O​

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2 sensor for both catalytic and
non-catalytic cars.​

On​

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CATALYTIC CONVERTER equipped vehicles:​

Install the oxygen sensor’s bung upstream from the catalytic converter (a bung and plug is
included in the LC-1 kit). Any decent muffler or exhaust shop can do this for you. The wideband
oxygen sensor is then installed into the bung to take a reading. (Insert the plug into the
bung when not in use).​

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The bung must be installed in the exhaust pipe at the side or on
top, NOT on the bottom of the exhaust pipe. Best position is between 10:00 and 2:00
position.​

On​

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NON-CATALYTIC converter vehicles:​

You have the option with non-catalytic cars to also use a Bung as described above. Use of a
bung is the preferred method for mounting the 0​

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2 sensor for both catalytic and non-catalytic
cars.​

On​

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TURBO CHARGED vehicles:​

Install the bung downstream from the turbo before the catalytic converter. The high exhaust
pressure before the turbo interferes with the lambda measurement and the high exhaust
temperatures encountered there can damage the sensor.
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Do NOT install the Bung below the 3 o'clock or 9 o'clock position.
Condensation can form in the exhaust pipe and permanently damage the sensor.​

6 o’clock is the absolute worst position to mount the sensor.

 

[to4garret]

true,

maybe i just read the manual then

 

[Richard]

I reckon it will get a better reading in the stock spot, if it is to far down the pipe it wont be as acurate.
Most good wide band's have a narrowband output to put back into the ECU if you need to still so that way there is only one sensor..

 

[Liberoz]

after the cat,,,, end of story

 

[BMGTZ]

after the cat,,,, end of story

so johnny would that be in contradiction of the inovate instructions saying "upstream"

 

[Liberoz]

so johnny would that be in contradiction of the inovate instructions saying "upstream"

should of read after cat "flange" before cat.

 

[milkandoj]

So you saying before the cat yeah? coz after the cat it "could" be slightly altered if the cats actually working. AS the cat catalises CO to CO2 but can also burn excess fuel aswell. Thats if your cat is working!

CATALYTIC CONVERTER equipped vehicles: Install the oxygen sensors bung upstream from the catalytic converter​

But then again on a dyno they put the smiffer in the tail pipe. Prob not the best, but the only way short of puttin a bung in.
Innovate also sell a kit to mount this sensor and kit and use as a mobile kit so can be used on a dyno.
The problem with stock location is the heat. and also pressure in the dump.More so in a stock one than a nice big 2.5 or 3 inch custom job.​

I reckon it will get a better reading in the stock spot, if it is to far down the pipe it wont be as acurate.
Most good wide band's have a narrowband output to put back into the ECU if you need to still so that way there is only one sensor..

They have instructios to building a heat sinc in the area its in is too hot. So too much heat is an issue.

And here is why i woulnt put in the stock spot. out of the manual. It talks about being before the turbo, but in a stock dump there would still be alot of pressure.​

"The high exhaustpressure before the turbo interferes with the lambda measurement and the high exhaust temperatures encountered there can damage the sensor."

Again out of the manual (once again)... about heat...
"The maximum temperature of the sensor at the bung (the sensor hexagon) should not exceed 500 oC or 900 oF. If these temperatures are exceeded in your application you should either install a copper heat sink (instructions below) or the Innovate Motorsports Heat-Sink Bung extender (HBX-1). The bung extender is recommended for situations where airflow is restricted or the encountered heat is higher than a heat sink can handle."

I swear ill stop cut and pasting, just it backs up whats being said. This is on manual ive actually read and found worth reading. lol

 

[milkandoj]

One thing ive been thinking about for my setup is where to draw the power source from.
Is the cigarette lighter plug ok. I'm not worried about the amperage, it has plenty to run a wide band. But i already run my electric boost controller off there. And planned on 3 gauges aswell (which will use bugger all)

Im more worried about noise or a varying current as the wideband operated and the solenoid from the ebc fires away. Will they stuff each others readings up?

From the instructions the gist i got was; to separate hight and low voltages such as ignition from gauges, radios ect to prevent noise. pretty strait forward.
But is says its best to ground all or as many as practical, devices at the same source to prevent a current taking the easiest route through say a gauges circuit and frying it all.

So as long as theres no noise is it best to run the boost controller, wideband, and 3 gauges off the cigarette lighter circuit, it had the amperage to do it.
Yes? Or a much better way? this way i dont have to make up another circuit with a relay which was the other idea.

 

[Richard]

Just remember that it is going to be the same A/F sensor that is used by current manufactures, due to emisions most cars now use a A/F sensor before the cat and an 02 sensor after the cat, also the cat is positioned as close to the head as practical in order to get it working quicker, so I really doubt in the dump pipe is going to be to hot for it, 500 degrees is pushing red hot and it's not gonna be that hot much.

 

[(2much)]

rich, are you talking about a turbo or non turbo car,

It says in all the installation guides that i have looked at, it should not be placed to close to the turbo

 

[JAP63]

TURBO CHARGED vehicles:​

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Install the bung downstream from the turbo before the catalytic converter. The high exhaust
pressure before the turbo interferes with the lambda measurement and the high exhaust
temperatures encountered there can damage the sensor.​

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My Evo III had a stock extra bung in the frontpipe...after the dump. I know this because i blew it out and had no idea what it was till I looked down there. Im talking the front pipe that leads to the Cat. If Mitsi think its a good spot, Id go with that.

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[(2much)]

but back in the day, mitsu didn't run WBO2

 

[fr0st]

Got mine done, just after the flexpipe which is around 33" from the o2 housing facing upward into the engine bay.

 

[JAP63]

Got mine done, just after the flexpipe which is around 33" from the o2 housing facing upward into the engine bay.

Thats a good spot

but back in the day, mitsu didn't run WBO2

Its not about the technology, but rather im talking about the best point to take fuel ratio and exhaust data from.
The stock bung i mentioned is likely for a 2nd O2 sensor for either tuning or datalogging.

Jamie.