Before I mount my turbo, Where is the best place to drill for pyrometer?
Im the manifold or in the downpipe.
Why is one better than other.
Every semi truck (which is alot- truck mechanic) I've seen they are located in the downpipe.

 

Manifold, gives a more accurate reading. Down pipe can be 200-300 degrees off. Drill on the firewall side of the divider in the manifold.

 

i agree with manifold... dont drill dead center or youll be sorry lol theres material there.

 

x3...

 

Sounds good thanks guys.
Anybody know if 94-98 exhaust manifold is better than a 1st gen. 24 valve manifolds are round port correct.

 

I do not have my gauge yet. But the turbo is off now. What size pipe thread is it 1/4"

 

To answer a few questions.
You want to measure the highest temperatures so you do not melt your pistons accidentally. Since the turbo draws its boost from the exhaust heat, doing so will lower the exhaust temperatures considerably. So is better to mount it pre-turbo (in the manifold).
The 94-98 manifolds are different... im not sure if it will fit.
As far as taping, it depends on the sending unit, some are 1/4" some are 3/8" and it is pipe thread. I don't recommend running the tap all the way down, so that way you can make the bottom piece nice and tight. Mine and the tap has same taper(self sealing threads).

 

This help?



http://www.tstproducts.com/pdffiles/instpy25b.pdf

http://www.dieselpowermag.com/tech/0...arts_list.html

Good luck DKim......

 

You da' man David

That tst article is nice.

 

Thanks Brandon. Now I just have to get mine moved. It is one stuck motha in the downpipe. Got a new torque wrench and a crowsfoot adapter in the mail to me as we speak.

 

Blackfordd- Thanks for the two links. Very Nice truck also.

 

Thank you sir. Appreciate it.