Hi Guys!

I want to install my LC1 sensor in the "rear narrowband" position on the EvoX..

On the X the rear NB is actually mounted halfway inside the cat. ie if you are looking at the cat from the side the NB is 50% the way along...

My question is - Will the heat of the cat cause any damage to the LC1 sensor.

I don't really want to get a bung welded as I want to keep the "stock" appearance..

Secondly - I assume the reading's will be slightly off (due to the cat), would 0.2 - 0.5 AFR (reading leaner than reality) be fairly accurate

--edit--
So I did a bit of reading, supposedly the LSU4.2 sensors have a operating temp of less than 930°C, and a MAX of 1030°C (http://wbo2.com/lsu/Y258K01005e03mar21eng.pdf)

Cat's supposedly light off at 260°C, and have a operating temp of around 760°C and really a max of 1100°C (http://www.aa1car.com/library/converter.htm)

So in theory I *should* be ok....

Anyone have any first hand experience with this?

Cheers
David

 

No, but if you have plans to run the car extremely rich for some reason temps at the cat will increase beyond the listed threshold.

Which will destroy your cat as well as your 02.

I wouldn't do it personally because I'd rather see a closer to real A/F. But I'd think you should probably be ok.

 

as ugly as it sounds, gut the cat.

 

I've never seen a X exhaust, but for $100 on the 8 and 9 you could get a resonated test pipe and just put a bung on that. You can remove it later to make it stock looking. I guess, unless you're trying to fool Mitsu techs.

 

I like that option better as well. I'm always hesitant to do it though because you can sell them later for money. (To people returning to stock) But if you factor in the cost of a decent test pipe, you might as well. Especially if you aren't planning on doing a full exhaust.

 

I wouldn't put the lc-1 there. The cat will affect your afr readings. The WB02 should be mounted before the cat. As for the temp, your just fine Feel free to try it, but i like it closer to the turbo outlet (faster readings)

 

I think you will be fine. I can't speak for installing a wideband sensor inside the cat, but I ran a wideband sensor post-cat in my DSM for years. It worked fine and from what I remember the readings were identical with a cat or test pipe installed for me. With the cat, the readings were just a little smoother.

 

thanks guys... I want to retain my cat, environment friendly

Any more information or first hand experience on heat generated by the cat?

I am not so worried by the AFR changes

 

Why don't you just adopt a baby seal instead or something...

 

Wait wait wait, you got an X? Awesome tephra! Congrats! I will keep telling people to send you donations so you can buy some goodies for it

Stick the LC1 sensor wherever the stock sensor was, it'll be fine. We run them on cars w/o cats all the time with no problems. In fact, I have run them on the o2 housing with no long term ill effects.

 

really? in the o2 housing? I thought temps would def kill it

ok I will give it a go, worst case is i need _another_ new sensor

 

At least the LC1 sensor is an off the shelf sensor.... Bosch VW wideband!

 

yeah - i got a new one sent over a few weeks ago (thanks HB Speed!)

but its a pretty expensive exercise

 

It depends where you buy. The same sensor is listed under many numbers:

VW
022906265
022906265A
055906265A
06A906262BC
06A906262BH
06B906265D
077906265AC
077906262
021906262B
022906262BB
06A906262AE
06A906262AF
077906262D
079906262E
07C906262D
07C906262K
07C906262N
1K0998262D

PORSCHE
94860612802
94860612800
94860612801
94860412800EM02

BOSCH
0258007235
0258007237
0258007157
0258007085
0258007109
0258007090
0258007061
0258007063
0258007057
0258007351

0258006066

Bosch USA [ 17014 ]

SKODA
06A906262AN
06A906262BC
06A906262BH
021906262B
06A906262AF
06B906265D

SEAT
021906262B
022906262P
06A906262AE
06A906262AF
06A906262AN
06A906262BH


BMW
11787515826
11787515827
11787529980
11787516150
11787521705
11787530736
11787515826
11787515827
11787529980
94860612802

AUDI
022906265A
022906262P
06C906265B
07D906262C
022906265A

Walker
250-25003
250-25004

Mercedes
0025401817
0035427318

NGK
1851/NGK
1884/NGK

UNIFIT
OX 105-B
OX 105-S

Hope it helps

 

I got HB Speed to send me a "0 258 007 058" - which is Bosch #17014...

You can get them for about $52 USD - which isn't too bad

Sensor part numbers here:
http://wbo2.com/lsu/default.htm