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Old 07-06-2015, 01:27 PM
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best location to install EGT gauge

I did an EGR delete and installed an EGT gauge at the blockoff plate on the exhaust, however this doesnt seem to be an ideal location because I am getting fairly low readings. What is the best location to install one of these things?
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Old 07-06-2015, 02:07 PM
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That depends on what model and year you have.
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Old 07-06-2015, 07:37 PM
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I installed mine in a "test pipe" between the exhaust and the turbo - this in a OM617 Cali version. I'm most interested in the temperature entering the turbo as opposed to the lower temperature at the turbo outlet.

As indicated above it all depends on which engine you've got.
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Old 07-07-2015, 07:49 AM
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These are just generic answers but you should:

1. Mount the sensor in an area where it is in the exhaust stream.

2. The sensor tip must extend at least 1/3 of the way into the exhaust stream but no more than 2/3 in.

Posting a couple pictures of the sensor and it's current mounting location would help the diagnosis as well.

What readings are you getting?

What make/model gauge do you have?
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Old 07-07-2015, 11:10 AM
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Quote:
Originally Posted by boise outlaw View Post
I did an EGR delete and installed an EGT gauge at the blockoff plate on the exhaust, however this doesnt seem to be an ideal location because I am getting fairly low readings. What is the best location to install one of these things?
If you are talking about a 617 engine, that EGR port on the manifold is the worst place to put an EGT probe because of that long runner. Best place is to drill a hole and install the prob on the back side of the collector where the turbo is mounted.
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Old 07-07-2015, 01:28 PM
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1985 300sd, DeliveryValve had the answer I was looking for. I will have to drill and tap a port I guess. But yes the location i chose is terrible, its out of stream so all i'm getting is the temperature of the manifold in that location which is about 150 degrees. We have alot of hills in my area and i'm always downshifting in the powerstroke to avoid temps over 1200 so i can imagine I will need to monitor with this one as well.
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Old 07-08-2015, 01:36 AM
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Originally Posted by boise outlaw View Post
We have alot of hills in my area and i'm always downshifting in the powerstroke to avoid temps over 1200 so i can imagine I will need to monitor with this one as well.
I doubt you'll have much problem. Just think of all the people driving their MB around without a gauge completely oblivious to the fact that they even have a turbo and have almost no turbo issues. And perhaps even more so just turning the engine off without waiting for the turbo to stabilize after a long pull up a hill to a scenic view...amazing they don't coke up more.

I typically max out at around 1150 on mine but have seen 1250 momentarily on a max power grade trying to maintain speed, but I like to keep it at or below 1200 as a personal red line. My probe is pre-turbo so reading at the hottest point.
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Old 07-08-2015, 10:58 AM
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Mine is in the pipe right out of the turbo but my situation is unique. I have virtually NO exhaust system, just a short pipe exiting the right front fender. Ideally it would be right behind the turbo flange on the manifold and just before the turbo - I've done MANY of them on dyno setups. The next time I have the turbo off I'll drill and tap a port there. You CAN do it with the turbo in place if you vacuum as you drill and use grease on the drill bit and on the tap to catch the metal chips but I decided to wait until I have the turbo off to do mine. Metal filings and turbos do NOT play well together.

The EGR spot is excellent to take exhaust manifold PRESSURE, however. This is useful and actually necessary if you need to calculate turbo pressure ratio. I have a port there and while I don't run that gage all the time I can toss one on there when I'm doing dyno work to evaluate the turbo.

Dan
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