Ta-technixs exhaust system - lambda sensor and catalyctic converter

Hi,

I have bought a full stainless steel exhaust system for my cabrio 16v swap but need to ask for advice for where to weld the lambda sensor fitting?

What kind of catalyctic converter have you bought for your cars? It needs to be fairly small and the middle pipe has a small bend wich makes it a bit more complicated..

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A generic Magna-flow while ok, usually only lasts about a season, and needs replacing, at least in my experience, where as the OEM ones a tad more pricey are direct bolt on to a normal system and last a tad longer.

For the O2 sensor (lambda) sensor I had my O2 bungs welded to the as you look at it from the front the left most down pipe, (I had to extend the O2 wiring harness)
or from under the car the RHD drivers side LHD pasenger side of the car.  This made the installation and replacement of the O2 way easier than the OEM on the back of the Manifold.

It also gave it more clearance as the tranny mount and things as the shifter got in the way.

Yes this is a HO-made dual down and the welds were the mock ups.  But you will get the idea.




After both of my cars passed the 25 year mark, I could delete the CAT, which I was grateful for.

On my Cat Delete Raceland header there isn't a bung for the o2 and I will eventually have to have one placed on it, and I will choose the same position.



 

Briano1234 said

A generic Magna-flow while ok, usually only lasts about a season, and needs replacing, at least in my experience, where as the OEM ones a tad more pricey are direct bolt on to a normal system and last a tad longer.

For the O2 sensor (lambda) sensor I had my O2 bungs welded to the as you look at it from the front the left most down pipe, (I had to extend the O2 wiring harness)
or from under the car the RHD drivers side LHD pasenger side of the car.  This made the installation and replacement of the O2 way easier than the OEM on the back of the Manifold.

It also gave it more clearance as the tranny mount and things as the shifter got in the way.

Yes this is a HO-made dual down and the welds were the mock ups.  But you will get the idea.




After both of my cars passed the 25 year mark, I could delete the CAT, which I was grateful for.

On my Cat Delete Raceland header there isn't a bung for the o2 and I will eventually have to have one placed on it, and I will choose the same position.



 

Hi,

Thanks so much for your reply, I will have the same position for the lambda sensor bung as you have in your pictures.

Regarding the cat, I will get a small sport version welded in since its mandated here in Sweden with the 16valve conversion.

// Viktor

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I wouldn't weld it, as if your pipes are correct, and hung properly you can use the SS banded Clamps that are about 4 inches long and when fully tightened hold the pipes extremely well and make future replacement of the cats a whole lot easier to deal with.

That is sort of what I did, when buying after market Cats.  Towards the end of my run with emissions, I would hang the cat on one cabby, get it emissioned then drop it place the straight pipe on with those clamps, then repeat the other Cabby and remove it.  I have a 9 year old cat that has about 5 days of use on it….