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2003 LC TD exhaust gas temperture (EGT)
Posted: Tue Jan 25, 2005 5:23 pm
by Cobradave
I have unsuccessfully tried to find out from Toyota what the maximum EGT should be for my 2003 LC TD. I have installed a pyrometer just after the turbo as I have a Dtronic installed and often tow a 4 ton van. I need to know the safe max. temperature but have run into a brick wall with the dopes at Toyota.
Can anybody help me with information please.
Thanks,Dave
Re: 2003 LC TD exhaust gas temperture (EGT)
Posted: Sat Jan 29, 2005 8:52 pm
by 80scruiser
Cobradave wrote:I have unsuccessfully tried to find out from Toyota what the maximum EGT should be for my 2003 LC TD. I have installed a pyrometer just after the turbo as I have a Dtronic installed and often tow a 4 ton van. I need to know the safe max. temperature but have run into a brick wall with the dopes at Toyota.
Can anybody help me with information please.
Thanks,Dave
Go to
http://www.thermoguard.com.au/ and all will be revealed. I have one of their EGT guages in my 80 and wouldn't be without it.
Posted: Sun Jan 30, 2005 6:40 am
by Cobradave
Looks like a good gadget however I am measuring the EGT after the turbo not between the exhaust ports and turbo inlet.
How hot is too hot?
When EGT is measured upstream of the turbocharger
(that is between the exhaust ports and the turbo exhaust
gas inlet), it is generally accepted that sustained
temperatures in excess of 720 °C (~1330 °F) will result
in progressive and irreversible damage to components.
The increased temperature from the turbo is not taken into account, that's what I want to know.
Posted: Sun Jan 30, 2005 12:01 pm
by phippsy
I thought that between on the manifold would be the best place to get an accurate measure of how hot the engine is running. Measuring the temp after the turbo has heated up the gas shows how hot the exhaust is after its been through the engine and the turbo has had another go at heating it up.
Posted: Sun Jan 30, 2005 12:07 pm
by Cobradave
I already know the temperature of the engine. I want to prevent melting the turbo, it is the most vulnerable component outside of the block and that's why I want to know the temperature right after the turbo has heated the air.
Regards,Dave
Posted: Sun Jan 30, 2005 8:41 pm
by dunny
Gday Dave,
My pyro on my GU TD6 is in the same spot as yours. the max you should see is approx 550C , not towing mine reaches about 440 up large hills or on a dyno.
cheers dunny
Posted: Mon Jan 31, 2005 7:39 am
by 80scruiser
My thermoguard one is mounted after the turbo and I do not exceed 550 degrees for very long. On cruising it sits around the 350 degree mark. I have been doing fine adjustments to suit so I don't melt anything.
Go to
http://www.exploroz.com and go to post 17762 in the archive and that should answer your questions.
Posted: Mon Jan 31, 2005 8:09 am
by phippsy
17762 is about a lopsided cruiser...
Posted: Mon Jan 31, 2005 8:48 am
by 80scruiser
Sorry 17662.
Posted: Mon Jan 31, 2005 9:25 am
by 80scruiser
Cobradave wrote:Looks like a good gadget however I am measuring the EGT after the turbo not between the exhaust ports and turbo inlet.
How hot is too hot?
When EGT is measured upstream of the turbocharger
(that is between the exhaust ports and the turbo exhaust
gas inlet), it is generally accepted that sustained
temperatures in excess of 720 °C (~1330 °F) will result
in progressive and irreversible damage to components.
The increased temperature from the turbo is not taken into account, that's what I want to know.
According to Ian at Thermoguard the temp can drop as much as 200 degrees after it passes through the turbo. Give him an email as he is great to deal with.