EGT gauge

Submitted: Sunday, Mar 21, 2010 at 16:43
ThreadID: 77062 Views:3620 Replies:5 FollowUps:5
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Hi All,
Has anyone got or know of an EGT gauge, either analogue or digital with an adjustable warning buzzed/siren to warn of over the top temperature?
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Reply By: Member - Graham H (QLD) - Sunday, Mar 21, 2010 at 16:54

Sunday, Mar 21, 2010 at 16:54
No but if you google you may find one or look on this site

I got my Autometer one from him for $150 US when they were $300+ here

Keep your eye on it is the best way as it can go high in most unexpected places

EG on a flat road when towing in 4th mine sits at around 325deg at 90kph

Drop it into O/D and it shoots up to 400+ cos the engine drops below optimum torque and starts lugging.

I never take mine over 500deg post turbo as the cylinder temp will be 200deg higher.

AnswerID: 409782

Follow Up By: Member - Vince B (NSW) - Sunday, Mar 21, 2010 at 22:07

Sunday, Mar 21, 2010 at 22:07
Hi Ian.
There is an interesting article on covering EGT.
They state that max temp(for sustained periods) is 850 degC (turbo inlet) & 680degC (turbo outlet).
My probe is post turbo & towing up the Towoomba Range reached a max of 565 deg.I was worried that temp was too high but had a dyno in Brissy last week & was informed that the temp was ok.
I plan to tow again over Easter & it will be interesting to see if there is any difference in EGT after the tune.
FollowupID: 679784

Reply By: dirttracker - Sunday, Mar 21, 2010 at 18:52

Sunday, Mar 21, 2010 at 18:52
Beware of knowing too much. What are you going to do with the new information? What is a high temp? Where do you find the correct info for your motor/vehicle?
I have a Prado 3 ltr non D4D with a DP Chip and Beaudesert 2.75 exhaust. I installed an EGT gauge from US. I put the alarm on 500 deg and hit the FWY. Standing start flat out and the alarm went off at approx 70 kpm! and screamed all the way to 110 kpm. On the flat, car only, I am normally on 300 - 400 deg. A hill, up it goes towards and beyond 500 deg. With camper trailer and a hill - 700 deg! What is right and wrong re this motor? I would not have a clue! I suppose if it stays up I would slow down to drop the temp. The sensor is post turbo by the way.

However, the site where I got them is great and the gauge fits well and they made up a fitting for me to go with the thread of the Beaudesert exhaust.

AnswerID: 409798

Follow Up By: Member - Graham H (QLD) - Sunday, Mar 21, 2010 at 19:02

Sunday, Mar 21, 2010 at 19:02
Well as I said, in the Cruiser I never take mine over 500deg cos cylinder temps are about 200deg higher.

If I am getting up around 500 deg I drop back a cog and slow down

Perhaps a look on Lcool site will give you the info you need They have a section for Prado's I think

As for knowing too much. Better to know the temps to avoid and slow down earlier than melt a piston or similar.

Thats why I got it and how I use it
FollowupID: 679735

Follow Up By: Thermoguard Instruments - Saturday, Apr 10, 2010 at 13:25

Saturday, Apr 10, 2010 at 13:25
Hi Martin,

It's a few weeks since your post and you may have already sorted out your EGT gauge problems.

If not, I say there's a high probability your Auber gauge from the USA is reading degrees Fahrenheit (F), not degrees Celsius (C). 500 F is only 260 C, so I'm not surprised the alarm goes off readily.

If you read the instructions you should be able to find how to change the display to deg C. An alarm set at 500 C will be much more useful.

I agree with Graham - I don't think it's possible to know too much - but you do need to know how to use the information. May I suggest a look here to help you make use of your EGT gauge.

FollowupID: 682372

Follow Up By: Member - Graham H (QLD) - Saturday, Apr 10, 2010 at 13:39

Saturday, Apr 10, 2010 at 13:39
I never thought of that as I had the foresight to order a Metric one

500degC is what I was talking about and that correlates to the temps in your article so I do have it right.

It would certainly be screaming at 500F wouldnt even be up to operating temp at that

FollowupID: 682373

Follow Up By: dirttracker - Saturday, Apr 10, 2010 at 15:47

Saturday, Apr 10, 2010 at 15:47
Interesting enough from memory, I went through the changing of the temp units from F to C because of that question. I was on C and still had those temps. All to no avail, however, as someone wanted my Prado and took it without permission. Oh well, after the insurance washup, I will get a letter model D4D and wont bother with a new exhaust. I may, however, put a Steinbauer chip in the future.
FollowupID: 682394

Reply By: Member - Chris & Debbie (QLD) - Sunday, Mar 21, 2010 at 18:54

Sunday, Mar 21, 2010 at 18:54
Hi Ian,
I went for a digital gauge off Ebay from Auber Instruments, in the USA. The alarm point is progarmable with indicator light and a relay output. Here is the ebay Link

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AnswerID: 409799

Reply By: Member - Rod N (QLD) - Sunday, Mar 21, 2010 at 20:05

Sunday, Mar 21, 2010 at 20:05
In another thread where I asked the same question this one was recommended Thermoguard There are several articles on the site which may give you the info you are after. I do not have one yet so can't talk from experience.
AnswerID: 409815

Reply By: Member - Ian H (NSW) - Sunday, Mar 21, 2010 at 20:50

Sunday, Mar 21, 2010 at 20:50
Thanks for the help. Now, which one do I choose. Decisions, decisions!
AnswerID: 409826

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