Why Is Pyro Gauge Reading 500 Degrees With Cold Motor

Spudman

How-do-you-do anybody

I've recently installed these gauges

They are step motor gauges, when I connect power to them information technology goes through it exam stage, the dial spins and and then it goes back to 0, 0 = 200 degrees Celsius, so I rev the motor and get the turbo to spool and it sits on the 200 Mark and doesn't move, I believe it should exist running normal effectually 300 degrees.

This is where I installed the probe

Now when I put the probe in I pushed it all the mode in and then tightened up the locking nut.

So what I'm asking is, is in that location special manner to place these probes, like in a footling scrap, one-half etc. or what else should I be looking at.

On my other guess the boost one, it'southward non connected to the vacuum line so when it tests itself the alarm goes off because it stays on 30psi boost.

So it'due south fix up correctly, just non reading temperature.

I hope I've explained it properly and hopefully someone tin help

Thanks

Spudman

Locked79

Probe needs to sit down in the middle of the frazzle stream. Have y'all driven the vehicle with the probe installed? If your stationary reving the engine with no load it won't read over 200. Other than that, maybe faulty wiring or probe?

Spudman

Probe needs to sit in the middle of the frazzle stream. Have you driven the vehicle with the probe installed? If your stationary reving the engine with no load it won't read over 200. Other than that, maybe faulty wiring or probe?

Nah I didn't accept information technology for a bulldoze, ran out of time, thanks for the response, I'll movement the probe tomorrow so information technology's sitting centrally and become for a bulldoze and written report dorsum.

:cheers: Spudman

RufusTheDufus

The probe looks like information technology'due south a good 12 inches below the turbo. The exhaust gasses accept a lot of time to cool by the time they get to the probe.

IanB

Ideally you want the probe in the center of the exhaust stream, Before the turbo, for best results. Equally mentioned, where you lot have the probe gives the gasses a lot of chance to cool, so your readings won't be "true" readings, but meliorate than nothing even so. Continue this in mind when tuning, if you lot see 400 degrees for instance on your gauge, the gasses leaving the engine will be much hotter, and there's no good way to know exactly how much hotter without moving the probe.

Spudman

Thanks guys for all the comments.

As I was putting a 3 inch exhaust on concluding weekend, my mechanic friend said that would exist a good identify to put straight off the Turbo, simply earlier I go and move it I but want to share some figures with you.

I just went for a drive and at 60mph (110kmh) the guess was reading at 300 degrees Celsius and I was getting 10psi on the boost approximate, so does that sound well-nigh right or exercise you think it should exist 400 degrees at that speed.

Once over again thanks for your prompt responses.

:cheers: Spudman

cruiser_guy

300c at 110kph sounds common cold to me unless you're going downhill only and then I have my pyrometer pre-turbo.

RufusTheDufus

Does the exhaust transition from the stock downpipe to a 3" pipe a few inches earlier the EGT probe? It'south hard to tell from the photo if information technology's 3" piping off the turbo. A iii" pipe will let the frazzle to cool quicker than a smaller pipe. Every bit the volume increases the temperature decreases.

If you demand to install the probe postal service-turbo the best location is to tap a hole in the bandage iron elbow then the probe is directly in the middle of the menses out of the turbo.

Spudman

300c at 110kph sounds cold to me unless you're going downhill but and then I have my pyrometer pre-turbo.

Thanks, what should it be reading

Does the exhaust transition from the stock downpipe to a 3" pipe a few inches before the EGT probe? It's hard to tell from the photograph if it'south 3" pipe off the turbo. A iii" pipe will allow the frazzle to cool quicker than a smaller pipe. As the volume increases the temperature decreases.
If y'all need to install the probe post-turbo the best location is to tap a hole in the bandage iron elbow so the probe is directly in the middle of the menses out of the turbo.

Off the turbo I managed to find a pipe that fitted snug over the standard exhaust and the other stop had been expanded and fitted snug inside the three inch pipage, the overall length of the brusk pipe is around 3 inches, then the probe is almost 6 inches from the turbo.

Looks like I might demand to lodge another probe, I take information technology they are all the same.

Thanks for the advice

cruiser_guy

I really can't say what it should be reading mail service turbo.

Information technology is entirely dependent on load, road conditions, your engine, fueling (have you lot turned information technology up as many folks exercise), heave pressure, gearing, tire size and a whole host of other things.

On my 3B if I get the truck working hard in steady state conditions such every bit a long continuous steep hill which I can do without needing to change gears all the time, I will run at 1200F at 10psi boost. If I am in steady land cruising at say 90 - 100kph, no hills or headwind I'll expect to be at 700-800F merely just maybe 5psi heave. If I bump that upward to 110kph I'll probably get closer to 900F and peradventure 7-8psi boost. In that location are others out there with the same setup as I take who may have turned their fuel upwards slightly and their readings volition be completely dissimilar. There is no way for me to know what y'all're truck "should" be reading, there are way also many variables.

I can say that 300c sounds cool to me for driving at 110kph in what I'd assume to exist steady state conditions and a boost somewhere around half dozen-7 psi.

Spudman

Thanks for the advice mate, I haven't adapted the fuel.

300 degrees Celsius = 572 degrees Fahrenheit so yep it needs to be around 400 degrees which 750 degree Fahrenheit which seems to be the consensus

Pebbles

I have a turboed 2H and mine sits on about 350 on normal road conditions. Turbo is sitting on near 8psi at 100kms.
I think its reading right, and I would not be worried most information technology at all.

Like the other guys said though, I would be adding maybe some other 30-50 degrees on the reading to allow for the real temps at the turbo.

cruiser_guy

Thanks for the advice mate, I haven't adjusted the fuel.
300 degrees Celsius = 572 degrees Fahrenheit then yep it needs to be around 400 degrees which 750 caste Fahrenheit which seems to be the consensus

As you have the pyrometer mounted Afterwards the turbo I would exist MUCH more bourgeois on setting the fuel college. As I said, my readings are from a pyrometer mounted BEFORE the turbo.

For me, the pyrometer is there to ensure I don't cook my pistons so I desire to get a reading as close every bit practical to the combustion chambers. That's why my pyrometer is mounted in the exhaust manifold.

I take not seen whatever data on rut loss through a turbo but the consensus is that there is a fair amount of heat loss in that location due the pressure drib through the turbo. That's bones physics and thermodynamics.

Spudman

I had another conversation with my mechanic today and he's telling me it is reading right and that is where they mount them on trucks.

Some other manner to tell is using a laser heat gun measure information technology prior the turbo at the turbo and after the turbo and what variations we go, I'm going to try this, I know I tin can't test it whilst driving, but just sitting in the driveway should requite the right results.

I've besides decided not to arrange the fuel, as I am very happy how it it running at the moment.

Thanks everyone for the advice

Spudman

I have a turboed 2H and mine sits on about 350 on normal route atmospheric condition. Turbo is sitting on about 8psi at 100kms.
I think its reading right, and I would not be worried about it at all.
Like the other guys said though, I would be adding maybe another 30-50 degrees on the reading to allow for the existent temps at the turbo.

Thanks mate, I appreciate yous communication

cruiser_guy

...I know I can't test it whilst driving, only just sitting in the driveway should give the right results.

Sitting in the driveway will Non bear witness the temperature departure because at that place will be little to no pressure driblet. The temperature change/drop is Straight related to the force per unit area drop so the worst case will be at maximum heave. No pressure driblet = no temperature drop.

Spudman

Sitting in the driveway volition Not testify the temperature difference because there will be footling to no pressure driblet. The temperature modify/driblet is Straight related to the pressure level drop so the worst case will be at maximum heave. No pressure level drop = no temperature drop.

Yep I know you're right, I was just going to test it after I went drive and simply see for peace of mind if there was whatever difference.

Thank you

Spudman

niffa

Spudman I accept 12ht superlative mount intercooler xv pound boost and fuel screw wound out 1 turn ish. I sit on 300 at 100kph. x psi boost and my probe is mail service turbo. If I push difficult upwards a steep hill in 4th with ac on and 4 ppl and 200 litres of fuel on lath I will see just nether 500 degrees. Live in adelaide if I become upward s eastern freeway (very steep first for approx 5klm) I sit on 95kph and guage reads a abiding 450 degrees, this is a good reading because the hill is very long and i believe I get a true estrus soak on the probe because its such a long climb. I wouldn't be worried

Spudman

I would luv to do that, but the closest place is 700 kilometres away
Thank you

Spudman I have 12ht top mount intercooler 15 pound boost and fuel screw wound out 1 turn ish. I sit on 300 at 100kph. 10 psi boost and my probe is postal service turbo. If I push button hard up a steep hill in 4th with ac on and four ppl and 200 litres of fuel on board I will see merely under 500 degrees. Alive in adelaide if I become upwards south eastern throughway (very steep start for approx 5klm) I sit on 95kph and guage reads a constant 450 degrees, this is a skilful reading because the hill is very long and i believe I go a true estrus soak on the probe because its such a long climb. I wouldn't be worried

Thanks Niffa

That'southward good advice,

Bastyan Frich1936

Why Is Pyro Gauge Reading 500 Degrees With Cold Motor

EGT probe not registering temperature (1 Viewer)

RufusTheDufus

IanB

cruiser_guy

RufusTheDufus

cruiser_guy

Pebbles

cruiser_guy

cruiser_guy

Pebbles

niffa

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