Exhaust Gas temp gauge

[joey Avid PP Poster! Find all posts View Profile Close joey]

Re: Exhaust Gas temp gauge

bought my self a ehuast temp gauge and boost gauge yesterday so will post pics of the install soon....
the brand is autometer from the U.K.

cheers joey

[oldsalt Member Find all posts View Profile Close oldsalt]

Re: Exhaust Gas temp gauge

I have been doing a search of the web about these gauges.

I found this which I find very interesting. http://www.exploroz.com/Forum/Topic/176 ... guage.aspx

Temps can get to 500+. I think I'm correct in saying that they both have their sender units mounted downstream of the turbo, on the exhaust somewhere.
Ian Peterson, from Thermoguard in Alice Springs, strongly recommends mounting the sender BEFORE the turbo, in the exhaust manifold. At that point, temps can get up to 720+. His reasoning is that once the gases have been through the turbo, they have actually cooled down quite a bit and you are not getting a true reading of what your EGT actually is.
I'm not gunna dispute that, but i just can't bring myself to tapping a threaded hole in the exhaust manifold, in case some of the metal finds it's way into the turbo (not good at all!!!).
Ian's solution to this is to unbolt the turbo from the manifold before drilling and tapping, covering up the inlet to the turbo with plastic/cardboard or similar and doing a thorough vaccum and cleanup before re-bolting back together.
Sounds real good, but i don't trust myself to do it and am not sure I would trust any local spanner man to do it either.
As I said, if I mount it below the turbo, then it could be as useless as an ashtray in a motorbike, cos the reading could be a couple of hundred degrees shy of what is really happening.

Seems a bit of a job drilling the hole for the probe?

[oldsalt Member Find all posts View Profile Close oldsalt]

Re: Exhaust Gas temp gauge

Not being much of a mechanic, is this the pipe where the probe goes into???? (the silver one with the blue dot)

[MickL Addicted PP Member Find all posts View Profile Close MickL]

Re: Exhaust Gas temp gauge

As I said, if I mount it below the turbo, then it could be as useless as an ashtray in a motorbike, cos the reading could be a couple of hundred degrees shy of what is really happening.

Bit of an over statement, the temperature drop across the turbo is consistent so you just allow for it. As it is usually mounted in the center of the dump pipe straight after the exhaust turbine and waste gate, I doubt the temperature drop would be a couple of hundred degrees, your talking 3-4 inches further away! I think he is talking worst case scenario

Ian has great customer service and a good product, good enough for me to give him a plug in my first post.

But his advice should not be taken as gospel. His installation advice to me was to use my blanked off EGR port in the manifold, pity that is at cylinder 4 so I would effectively have 3 cylinders un-monitored :roll:


I'd say in 99% of cases the probe gets mounted down stream because of ease of installation.

It's as simple as fitting the gauge, going for a hard run ( or even better a dyno run) and seeing what peak temperature your
engine runs at.... then you know whets normal and what's not.

The point of the EGR gauge is it's an indicator if something unusual is happening ie: a big temp spike you would not usually see on your vehicle.

I suggest you only need to worry about the temperature drop across the turbo if you are planning on tuning your engine to the edge of destruction where every degree counts.

Mick

[MickL Addicted PP Member Find all posts View Profile Close MickL]

Re: Exhaust Gas temp gauge

is this the pipe where the probe goes into???? (the silver one with the blue dot)

No, thats part of the intake system (turbo to intercooler intake pipe)

Get underneath your Prado and follow the exhaust pipe back to it's source... the cast bit it joins to is the dump pipe. In my post showing pictures of my install you can see it from the top (mine in an aftermarket 3" dump pipe)

The alternative location(exhaust manifold) is buried under a heatshield, behind the intake pipe you have noted in your post.

Mick

[oldsalt Member Find all posts View Profile Close oldsalt]

Re: Exhaust Gas temp gauge

Thanks Mick, I will ave a look when the weather gets cooler.

I found a site in the USA that sells them http://tscsensors.com/pmdrd0000000ao0anal.html

With the probe the kit costs on todays exchange rate, $209.00 not including post.

Waiting for the exchange rate to improve may take a few years, also post would be a killer I expect.

Therefore, the Aussie retailer may be the best option. :lol:

[MickL Addicted PP Member Find all posts View Profile Close MickL]

Re: Exhaust Gas temp gauge

I found a site in the USA that sells them http://tscsensors.com/pmdrd0000000ao0anal.html

That's a nice unit... I like that it has outputs for a hi set point alarm... That means you could mount it out of sight if you wanted to.

Mick

[yetiboy01 Senior Member Find all posts View Profile Close yetiboy01]

Re: Exhaust Gas temp gauge

Biggest problem I see with installing the probe before the turbo is when the probe breaks off & goes through the turbo destroying it & leaving you bogged in deep sand on the shore break with the tide coming in, not a pretty thought :evil: If its mounted after the turbo & drops off it just gets shot out the back & with a bit of luck go straight through the tyre of the Nissan following you

I have been doing a search of the web about these gauges.

I found this which I find very interesting. http://www.exploroz.com/Forum/Topic/176 ... guage.aspx

Temps can get to 500+. I think I'm correct in saying that they both have their sender units mounted downstream of the turbo, on the exhaust somewhere.
Ian Peterson, from Thermoguard in Alice Springs, strongly recommends mounting the sender BEFORE the turbo, in the exhaust manifold. At that point, temps can get up to 720+. His reasoning is that once the gases have been through the turbo, they have actually cooled down quite a bit and you are not getting a true reading of what your EGT actually is.
I'm not gunna dispute that, but i just can't bring myself to tapping a threaded hole in the exhaust manifold, in case some of the metal finds it's way into the turbo (not good at all!!!).
Ian's solution to this is to unbolt the turbo from the manifold before drilling and tapping, covering up the inlet to the turbo with plastic/cardboard or similar and doing a thorough vaccum and cleanup before re-bolting back together.
Sounds real good, but i don't trust myself to do it and am not sure I would trust any local spanner man to do it either.
As I said, if I mount it below the turbo, then it could be as useless as an ashtray in a motorbike, cos the reading could be a couple of hundred degrees shy of what is really happening.

Seems a bit of a job drilling the hole for the probe?

[dirttracker Senior Member Find all posts View Profile Close dirttracker]

Re: Exhaust Gas temp gauge

Well I've done it. The EGT is in and the gauge is functioning. Thanks to the guys who posted on this thread as it was a great help. I can't say that it was easy but it is straight forward. I purchased all the gear from Auberins in the US. They sent them quickly and as I had a 1/4 BSP fitting in the dump pipe (Beaudesert), they made one especially and included it in their catelogue. This fitting for the sensor seems to be the Oz standard so now it can be purchased along with the gauge. All up cost US $112 via paypal. We will see what it costs in AUS $ as Paypal takes 5c in exchange rate as well. The sensor came with a 2 mtr or 4 mtr length cable. Ordered at time of purchase. I found that the 2 mtr one was fine. I fitted the gauge in the ashtray and packed black carpet around it to keep it in position. It fills the empty space and is dark enough to disguish the fact that the ashtray is gone. My wife had to ask what had been removed. Good sign!

I have the 1813 model (dual alarm, not sure how this is useful yet) with red numbers. The resolution can be changed by the push of a button. I have been told it can be linked to the parkers but I can't work that out yet.

I have set the high alarm to 520 degrees C and the low or off alarm at 480 degrees C. I am interested in the temp alarm for anyone who has installed an EGT.

Will post photos if wanted but they are similar to those already on the thread.

regards
Martin

[dirttracker Senior Member Find all posts View Profile Close dirttracker]

Re: Exhaust Gas temp gauge

Mmmmmmmm...

I set the alarm at 520 C and went for a drive. I did a hard acceleration to 100 kph and bam! Wailing alarms and 660 degrees C! I've got a problem it seems. Either I have the alarm too low or I have excessive exhaust gas temperature. My Prado has a Beaudesert exhaust and a DP chip and we pull a Jayco Eagle camper. I have the chip set on "6", up from "4" after exhaust fitting. I wonder what temps I have been generating on a recent hilly journey?

Any comments re temps or other?

Regards
Martin

[dirttracker Senior Member Find all posts View Profile Close dirttracker]

Re: Exhaust Gas temp gauge

I have found another thread with more information.

viewtopic.php?f=12&t=7085

It seems that it is difficult to know what the "correct" temperatures need to be. I might lift the alarm temp and turn back the chip a bit and observe!

regards
Martin

[leachy_9 Advanced Member Find all posts View Profile Close leachy_9]

Re: Exhaust Gas temp gauge

I've got a 3" Taipan Exhaust and a Steinbauer Chip and have never seen more than 550 DegC. This includes full throttle towing up some long steep hills.

Leachy