Where to put Pyrometer Probe?
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Freshman User
Joined: Nov 2012
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From: North Texas
Where to put Pyrometer Probe?
I have an Edge scan Guage that came with EGT probe and connector. I've seen some put the probe in driver side exhaust manifold, and others in the downpipe after the turbo. The downpipe makes more sense to me, but the instructions say to use the manifold.
Any experienced pros and cons as to which location is better for monitoring EGTs?
Any experienced pros and cons as to which location is better for monitoring EGTs?
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
EGT is about 400 degrees cooler in the down pipe than in the exhaust manifold. 1350 max in the manifolds, 950 max in the downpipe. I think most go manifold. Plenty of posts on how to do it on here. I did my own 7 years ago, no issues.
More Turbo
Joined: May 2015
Posts: 670
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From: Nampa, ID
I also installed mine in the manifold.
Junior User
Joined: May 2014
Posts: 73
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I just got the same edge product and was going to ask the same question, because my biggest worry of doing it on the truck is not getting all the metal out of the manifold and messing up my turbo, MooSSe your not alone
More Turbo
Joined: May 2015
Posts: 670
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From: Nampa, ID
What I did to prevent most of the shavings from going into the manifold was simply dip the drill bit in heavy grease. It catches most, but all of the shavings. for the shavings that ended up in the manifold, I used a strong magnet and coaxed the rest of the shavings out of the hole I drilled by dragging the magnet along the manifold, toward the hole. It worked great. I'd be lying if I said I wasn't at least a little nervous when I first started the truck back up, but all was well.
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Lead Driver
Joined: Dec 2006
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From: So. Jersey
I always put them in the manifold inline with a port to get the highest temperature that's closest to what the piston tops are feeling. Lay under the truck on the driver's side and look straight up at exhaust port for cylinder #8. When I drill them, I run the engine and the exhaust pressure ensures all chips to blow out while drilling.
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Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
Yes, let her idle while you drill, start with a small bit, then up to the correct NPT size for the probe. the low exhaust pressure will blow all the shavings out. Again, wear safety glasses and do it outside, you will be eating some diesel exhaust. It doesnt take long, dont press to hard on the drill, you are drilling a cast manifold. The probe needs to go up the tube leading from the exhaust port so that you get the probe right into the hottest exhaust stream as per above posts.
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Freshman User
Joined: Nov 2012
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From: North Texas
Thanks for all the advice. Looks like it will be the manifold.
I just saw an episode of GearZ with Stacey David. He took the manifold off before drilling.
Wish I had a shop like his. LoL
I just saw an episode of GearZ with Stacey David. He took the manifold off before drilling.
Wish I had a shop like his. LoL
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