Engine Operating Ranges

DocB · **Posted:** Sat Apr 21, 2007 12:44 am

Does anyone know or what have you seen on your gauges for operating ranges on the 2.8L CRD?

1. Pyrometer (pre-turbo)
2. Boost
3. Engine Water Temp
4. Oil Pressure
5. Trans Temp

DocB · **Posted:** Sat Apr 21, 2007 10:55 pm

Bump. Anyone?
I'd like to install gauges, and have an idea on some.
Would like to order correct/best range.
What are you seeing?

rs4mtnitro · **Posted:** Sun Apr 22, 2007 6:34 pm

I have seen my pyrometer hit 1200 degrees and boost hit 25psi. normally its around 800-1000 degrees and 15-20 psi. Those are the only gages I have.

DocB · **Posted:** Sun Apr 22, 2007 11:24 pm

Thanks rs4.
I guess no one else is running gauges on this diesel.
I plan to shortly.

Cowpie1 · **Posted:** Sun Apr 22, 2007 11:37 pm

Heck, I don't run pyrometer gauges anymore on my semi. Don't think I'll do it to my CRD. Most won't either. I have nothing against someone wanting to do it, but I found it to be another gauge I wasn't using that much if ever on my semi and I can't see a need on my CRD. It was more critical in the diesels of a couple of decades ago due to turbo design. Most problems have been eliminated since then. I put 1.4 million miles on my last semi without a pyrometer and never lost a turbo.

A boost gauge is nice to see if you have a CAC leak, but a CAC test done at a reputable facility will do more. A CAC must be pressurized to 32-35 psi and then hold tested for 15 seconds. If it looses more than 5 psi, it needs replaced. Most repairs to CAC's don't last that long and usually a new CAC best option. Of course, before putting one in, have it tested like above. Some are defective out of the gate. That is quite possibly why some here get lousy mileage out of their CRD.

That is why the fleet I drive with and my semi as well don't normally spec gauges like we used to. I don't feel the need to look at a dash that resembles a 747, costs more, and not that good of bang for the buck. If it doesn't help me make money, it doesn't get on the truck. I got sick of looking at temp gauges for each pumpkin, transmission, pyrometer, etc. The air tank gauges and engine oil and water temp and oil pressure are enough. I spend most time monitoring the tack on shifts. Since running synthetics throughout the drive train, temps have never been an issue.

onthehunt · **Posted:** Sun Apr 22, 2007 11:55 pm

If your running on the ragged edge or diagnosing a problem gauges are useful. Not worth the trouble of installing them IMHO.

rs4mtnitro · **Posted:** Mon Apr 23, 2007 8:14 am

Since I have seen 1200 degrees stock and 1250 is supposed to be as hot as you want to go when I get the ECM reprogrammed I am sure I will need to keep an eye on the gauge.

Ripster · **Posted:** Mon Apr 23, 2007 12:44 pm

EGT most I have seen is 800, with the ORM the temps dropped
100-200 so that I run now mostly 500-700. Have a long road
trip May 5th so may see 14 hours at 70 plus so will see how it does.
Boost is normally below 20, you have to use full throttle to get
it over 20. Personally I use mine to check shutdown temp, always
have --always will, just my preference to know.

Pablo · **Joined:** Thu Feb 02, 2006 10:06 pm **Posts:** 1201

Can't a scanner read most of this anyway? I would be happy to get a little scanner that I could hook up and remove. Does the computer have a pyrometer feed? I think it has everything else.

rs4mtnitro · **Posted:** Tue Apr 24, 2007 7:48 pm

Ripster wrote:

EGT most I have seen is 800, with the ORM the temps dropped
100-200 so that I run now mostly 500-700. Have a long road
trip May 5th so may see 14 hours at 70 plus so will see how it does.
Boost is normally below 20, you have to use full throttle to get
it over 20. Personally I use mine to check shutdown temp, always
have --always will, just my preference to know.

Is that pre or post turbo? I drilled and tapped my turbo where it attaches to the exhaust manifold. The only time I saw 1200 was at wide open throttle around 65-70 mph. In the next week I will be buying a suncoast converter and shift kit to be installed when I have the f37 with new pump done. After that the ECM will be going to Inmotion. I show the liberator no mercy at the sand dunes a couple times a year and I want to know if something is burning up.

Ripster · **Posted:** Tue Apr 24, 2007 8:11 pm

Unless it is a bit easy, I do the post turbo, I am looking for a baseline, even
if it is off by 100-150, it will always be off through the spectrum high to low
and I will have the baseline pre or post turbo.

oldnavy · **Posted:** Tue Apr 24, 2007 11:33 pm

I seem to remember normal coolant temp as being 175F, but it has been a year+ since I check it with scangage.

Engine Operating Ranges

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