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Old 08-04-2020, 10:02 PM   #1
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How to Utilize Engine EGT




I just got an EGT gauge installed on my 1995 7.3L E350 shorty. I don't really have any metrics for it, so should I just run straight and level with an empty load and declare that as baseline EGT? What's considered high for the 7.3L? Any sort of standard deviation if going uphill and working harder? Any hard ops limits associated with this engine?
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Old 08-05-2020, 12:35 AM   #2
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Egt

Safe is 1000 degrees Fahrenheit safe limit is 1275 I am using numbers from aircraft engine safe limits. You might scare yourself by what you see.

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Old 08-05-2020, 04:31 AM   #3
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Lots depends on where the probe is tapped. On a 7.3, drivers side manifold just past last cylinder and before up pipe is thought to be the hottest place..

You can run 1250 max continuous and occasional burst for less than a minute to 1300 or higher.. there’s plenty of ford guys hauling at 1250 running up to 1400(I’d be sweating) on a short hill climb but the aim is to run it as cool as you can. With a stock engine and driveline you shouldn’t get into trouble. It’s when you start rehearing , power adding, turbo swapping , etc that this comes into the most play
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Old 08-05-2020, 08:11 AM   #4
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I run mine at 900 flatroad. going up the hills about 1250.. Then I mostly lower the throttle or go a gear back.


Where did you connect your tach?


I used a dual probe EGT gauge to measure each bank separate.
The tach in my E350 is a modified F350 cluster.


Johan
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Old 08-05-2020, 08:43 AM   #5
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That’s right the vans don’t have tachs .. or was it just the diesels? I rode in an E series gasser shuttle that had one ..
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Old 08-05-2020, 09:13 AM   #6
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Looks good, you likely spent a small fortune for them, but accurate gauges are important.

As far as safe temps are concerned, the conservative view is that anything 1200°F and below pre turbo is considered safe.

I know guys that will run between 1200 and 1500 for short bursts and be fine, but at those temps you better have a finely tuned and maintained machine.

If you're all stock, you likely won't have to worry though, it's when you start pushing the envelope for more power that having an egt gauge is vital.
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