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  #1  
Old October 17th, 2010, 08:13 PM
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mark kellgren
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EGT Location

So I had my diesel shop install the EGT probe while my turbo was being replaced. Pic below shows the location they picked, which is just off the exhaust manifold on the #1 pipe pre turbo. Ideally I wanted it on the collection point of the exhaust manifold, but I absolutely wanted to have it pre-turbo, not post; I don't want to have to do any fuzzy math when it starts peaking on hot summer days.

Downside of this location is I am only getting a read on the #1 cylinder, but the good idea is the reading should be the hottest the gases are coming out of the piston, so I'll back off earlier rather than later to prevent turbo damage.

Thoughts on this location? So far, running around town I'm getting around 450 in normal traffic, and once engine is warmed up, I can peak at 650 above 2k rpm.
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  #2  
Old October 17th, 2010, 09:21 PM
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Would recommend moving to the collection point. You won't get a clear reading if one of the other cylinders starts to lean out.
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Old October 17th, 2010, 09:26 PM
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Quote:
Originally Posted by FrankenRover View Post
...one of the other cylinders starts to lean out.
EGTs go high with excess fuel. Lean is the normal condition and is cold.

650F ??? or 650C ??
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  #4  
Old October 18th, 2010, 09:28 AM
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mark kellgren
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Quote:
Originally Posted by red90 View Post
egts go high with excess fuel. Lean is the normal condition and is cold.

650f ??? Or 650c ??
650f.
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Old October 20th, 2010, 03:05 PM
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100% agree on pre-turbo. IMHO, EGTs are for protecting the turbo (unless you are talking about a jet engine; but that is one big turbo). I can see the arguement on single cylinder vs further down, but I would think some other symptoms would present if you were having a (in your case) #2 or #3 cylinder issue. But as I think you have already proven something is better than nothing. did you get root cause yet?
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Old October 20th, 2010, 08:02 PM
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Quote:
Originally Posted by Overlander View Post
650f.
That is nothing. On full throttle it should be going over 900 right away.
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Old October 20th, 2010, 08:25 PM
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Quote:
Originally Posted by FrankenRover View Post
Would recommend moving to the collection point. You won't get a clear reading if one of the other cylinders starts to lean out.
This is a diesel. Fuel makes temp go up. Lean condition = cool. Mark sounds like you drive like a 70 yr old or you are WAY lean. You should be able to reach 1200 min on long interstate hills in 5th gear with your foot in it trying to maintain speed. Like John said above these gauges move quickly both up and down.
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Old October 20th, 2010, 08:32 PM
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mark kellgren
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Quote:
Originally Posted by 130Tdi View Post
This is a diesel. Fuel makes temp go up. Lean condition = cool. Mark sounds like you drive like a 70 yr old or you are WAY lean. You should be able to reach 1200 min on long interstate hills in 5th gear with your foot in it trying to maintain speed. Like John said above these gauges move quickly both up and down.
I was guessing I was lean. It's the same setting as it was off the crate when Pendy received it for install. I always thought the engine may have more to give then it does, but never wanted to mess with the IP until I got the gauge in.

Sounds like I'm ready to richen it up and see what more this 2.8 has to offer on the upper end. Wow, that's going to be interesting.

Doug, am I good with just getting a read on #1 you think?
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