Oxygen sensor

[Oz2]

Hi all,

I have a tech edge wideband sensor unit and I wondering where is the best place to fit the sensor.
The fitting I have to weld in is stainless so I'm thinking fit it to one of the two pipes in front of the box and as close to the box as possible so it gets a more even measurement from each bank????
Anyone fitted one?
Cheers
Adam

[rev-erend]

I fitted mine near the end of the manifold and they need to be at the top
of the pipe so that water does not accumulate on them.

I also welded in a spare one on the other manifold and used a blanking bung to seal the hole - this just means you can swap sides to further diagnose issues.

I got the spare insert and bung from JP exhausts - just a couple of quid.

It's probably worth mentioning that MIG welding stainless is a bit of a waste of time - I had too many issues with porus welds, so I used a TIG in the end.

[B@man]

Could you put the sensor in the front face of the "silencer" so it would sense both banks, I've been using a tailpipe attachment and it's fallen off at least once!

[rev-erend]

It would be worthwhile downloading and reading the Techedge info on positioning ..

http://www.wbo2.com/lsu/position.htm

[Oz2]

B@man said:

Could you put the sensor in the front face of the "silencer" so it would sense both banks, I've been using a tailpipe attachment and it's fallen off at least once!

I was also wondering if It could go in the silencer, it may need the flow??

[rev-erend]

Personally - I think that would be too far away and the sensor would not get into its proper heat operating range.

[Campbell]

Ive got 2 of the tech edge wide band units installed and wired up to my DTA for trimming both injector banks, they are installed on the top side of the manifolds just back from where it goes from 2 to 1 it is best the get the gasses when they are at there hotest to get the best readings.
Plus there is loads of room at this point for them with in the chassis.

Cambelt

[adam quantrill]

It's a bit of a faff welding the boss on - on we did one with the bung in it to try and keep the boss from distorting but it semi-welded itself to the boss.

Best just to weld it in then chase the thread out - make sure you get the right tap. I think it means getting the manifold off?

[Oz2]

So, if you read above it says the recommended distance from the closest exhaust valve for the sensor is 1metre, as Adam Q says the manifolds will need to be removed, or maybe just the longest one. My question for the day is, does anyone have a manifold already off the car that they can measure for me, how far past the 2-1 joint is 1 metre?
Cheers
Adam

[Jack Valiant]

Put mine down here on the Gredge each side....

[B@man]

Oz2 said:

So, if you read above it says the recommended distance from the closest exhaust valve for the sensor is 1metre, as Adam Q says the manifolds will need to be removed, or maybe just the longest one. My question for the day is, does anyone have a manifold already off the car that they can measure for me, how far past the 2-1 joint is 1 metre?
Cheers
Adam

I'll check you for later, my manifolds are both off the car at the moment !

[adam quantrill]

Beaten to it on the flea for a tech-edge, oh well maybe next time! Yes let me know too for when I get around tuit.

[Oz2]

adam quantrill said:

Beaten to it on the flea for a tech-edge, oh well maybe next time! Yes let me know too for when I get around tuit.

Can't you get one direct from here, I think mine was about $300 for the kit.

[adam quantrill]

Yeah but 'cos I is tight as a gnat's chuff I am checking for secondhand ones!

[Oz2]

adam quantrill said:

Yeah but 'cos I is tight as a gnat's chuff I am checking for secondhand ones!

Maybe 1 should try a relaxant too loosen 1's chuff!!!!
Hahaha