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Who Knows About Sensors In The Exhaust System?


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#1 nicklouse

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Posted 14 January 2019 - 12:12 PM

ok then I have a cat which will need a port fitting to it for inspection and a sensor.

 

does any one know about positioning the sensor? yes it is a very wide open question and I have googeled and read things but I am looking for info from people who have done stuff like this and have got it wrong and then done it right.

 

things like angle to gas flow?

vertical or horizontal or something between?

 

I think it will be mounting it on the conical face on the input side of the cat at an angle between vertical (up) and Horizontal but not either.



#2 mini13

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Posted 14 January 2019 - 01:36 PM

the general concensus is to mount horivontal or above, so no condensation can sit in the sensor see section 2.3 in the link

 

https://www.innovate...LC-1_Manual.pdf



#3 nicklouse

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Posted 14 January 2019 - 01:59 PM

the general concensus is to mount horivontal or above, so no condensation can sit in the sensor see section 2.3 in the link

 

https://www.innovate...LC-1_Manual.pdf

nice one. now a bigger question do they all use the same thread size? M18X1.5mm



#4 mini13

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Posted 14 January 2019 - 04:16 PM

Yep, you can just use an M18 nut if you have one handy.



#5 mini13

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Posted 14 January 2019 - 04:24 PM

but you can get the stainless ones cheap if you need them, and also in 45 degrees.

 

https://www.ebay.co....bxdmZ:rk:9:pf:0

 

https://www.ebay.co....&frcectupt=true



#6 nicklouse

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Posted 14 January 2019 - 05:06 PM

yep. got a flat one coming as it will be mounting on the cone to give a bit of a better fit

xQ2dwi1.jpg

now to size the ends.



#7 Icey

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Posted 14 January 2019 - 06:05 PM

I’d want it in an exhaust section before any joins (i.e in a primary). Leaks can throw the readings out so it’s one less thing to think about if there’s a problem.

#8 nicklouse

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Posted 14 January 2019 - 07:47 PM

I’d want it in an exhaust section before any joins (i.e in a primary). Leaks can throw the readings out so it’s one less thing to think about if there’s a problem.

no room.



#9 Moke Spider

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Posted 14 January 2019 - 07:55 PM

The 'best' general location is about 1.5 times the pipe diameter past the last joint in the headers, though, ideally, one in each header pipe about 3 - 4 inches down from the head. You don't want it too far back in the system as any residual fuel can still 'burn' in the hot pipe and give a bum steer.



#10 nicklouse

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Posted 14 January 2019 - 08:00 PM

The 'best' general location is about 1.5 times the pipe diameter past the last joint in the headers, though, ideally, one in each header pipe about 3 - 4 inches down from the head. You don't want it too far back in the system as any residual fuel can still 'burn' in the hot pipe and give a bum steer.

but as i dont actually need a sensor in there..... and as there is no space but still need to have space just in case i do decide to fit one. the only way to get one closer to the engine would be to drill a hole through the Floor/tunnel, and if i was going to fit one it would be a heated one.



#11 Moke Spider

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Posted 15 January 2019 - 12:11 AM

Nick, the heated types don't do anything to the gases they are measuring, the heater is there so when turned on, the evaporate any residual moisture or other liquids in them before they start measuring. I think they are all heated these days.



#12 nicklouse

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Posted 15 January 2019 - 12:28 AM

good to know more to chose as and when. i thought the ones in the manifold cats were not heated as they get to temp damn fast.






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