Pyrometer sensor install

[Jed Clampett]

Haven't quite decided 100% but am considering putting the pyro sensor in the down pipe.:eek: :D One of my questions is, will I have to weld a threaded fitting for the sensor to thread into? Doesn't seem like enough metal for a good stable fit?
Suggestions appreciated. I know, I know:rolleyes: someone is going to suggest I put it in the manafold I still might:D
Thanks

[torque454]

That isnt a real accurate place for it. It needs to be right before the turbocharger in the exhaust manifold. :D:D:D:D

[GMforlife]

The only thing that i would see wrong with putting it before the turbo is if it were to break off for some odd reason it will do some damage. on all of the 18 wheelers that i have driven they have them after the turbo charger and seem to work good.

[Jed Clampett]

Both points are accurate. :) I"ve read that the possibility of a sensor breaking, on a quality one, is remote but possible. As a society, we put people in jail on "reasonable doubt". That's a 5 to 7 hundred dollar possibility for me.:eek: This is a "drive around" truck with some medium hauling. I'm thinking I can afford to err on the side of caution by subtracting the 300 degree or so difference and learn how the truck runs under various conditions. I know I have to watch the response as it will be slower. Like I've said before, I'm new to the diesel world and learning as I go. I know others have gone the down pipe route and been ok with it. I just wonder if there are those that have and wished they hadn't:o
I'd like to hear from you.
Thanks

[Chevylover]

Post- or pre-turbo is not the problem.

Pre-turbo is a bit more accurate and will show higher temps than post-turbo, but if you know which temps for each position is the maximum before engine damage, it is equal where you put the probe.
Post turbo is about 200°F lower than pre-turbo.
The max. for post-turbo shouldn't exceed 1050°F.

Want more information ? Have a look here :
Gauge Installation (http://www.kennedydiesel.com/6265Gaugeinstallation.html)

Cu,
Sven

[Garth J]

I had a Isspro gauge with the sensor in the down pipe and thats where they said to put it they even gave me a nipple to weld there.
They said the gauge is calabrated about 200 deg lower at the higher temps to make up the difference...worked for me for years...Garth