300tdi disco EGT

Maybe I push mine too hard - but I run 18-19psi boost, EGT's up to 710 regularly ( almost every night) I have a bigger intercooler, gas flowed head, 2.5" exhaust, MTQ turbo. LPG system - all this on an engine that has 353,000km on it. ( All I have done is replace the big end bearings at 300,000km)

I run 33" BFG MT tyres, full length roof rack with roof lights, steel front bar with Hella 4000's and a Kaymar steel rear bar, full length rock sliders, front axle armour, dual batteries, tru-track front and rear, winch, cargo barrier, fronts and rear sunroofs and front and rear air con, and keep a my heavy craft wood drawers jammed full of recovery gear and camping gear, etc and I replaced the 5 speed with an autobox as I do a lot of sand driving. I have fitted basically everything there is to fit on my Discovery.

Despite being close to the max legal load most of the time, I still get 820-850km out of 88lt of diesel and around 20lt of gas - the gas just makes it go faster :) either driving from home to work up the M1/SE Freeway at a crawl each day or long highway runs.

I would not worry about turning up the fuel to get the EGT's up to 710-720 - from my experience, apart from blowing a bit of smoke at full throttle - it has not done me any harm and I can happily keep pace with the traffic from a traffic light, and sit at 100-110kph on the highway. I do struggle a bit on the steeper hills - dropping down to 90kph or so on the steep ones with the air con on but I'm happy enough with it as it is.

The 2.5Tdi engine is tough - and there is quite a bit more power that can be wrung out of it.

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Originally Posted by dullbird

guys I appreciate all this hence why I said I know everyone's car is different but unless I know what is and isn't an expectable level how can I judge?

hence why I was asking what people get if my plod gets 600 but mr lead get 750 then I know that I have a reasonable safe parameter

thats all I was trying to get out of that question

Its kind of useless me fitting this gauge if i don't know what the unacceptable levels are

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Unfortunately that was not apparent in your earlier post.

The egt will vary with how much fuel is being injected to suit the load on your engine. High loads like towing, loaded climbs up long steep hills, accelerating hard up steep hills will push your egt's up.

You should not expect to see peak egt's on average hills, highway driving.

If you set the fuelling to see 600C to 650C pre-turbo, foot flat to floor, pulling a big hill, then that is probably as high as you want to go. As no doubt at a later stage you will encounter a longer steeper hill or will have a bigger load on and the egt will head for over 700 - you don't want the egt that high for very long.

You know when you are pushing it, so keep a close eye on the gauge in those circumstances and back off your right foot, or grab a lower gear when the egt skyrockets.

If you are seeing high egt too frequently on relatively easy hills, then fix what is causing it - not enough air (e.g. faulty turbo, leaking boost pressure) or to high fuel rate.

Edit: IMHO the turbo on 300Tdi's is not good enough if you want much better performance and keep the egt under control.

Use your EGT as a driving guide.
Like any gauge, watch it and you will see the temperature climb at times very quickly, especially up steep hills.
Mine go up 2-300 degrees in say 30 seconds under load.

Its a guide for you to see what sort of load you are actually putting the little thing under and perhaps when things do get a bit hot, back off and or drop down a gear, it makes an amazing difference and might just save the day/ motor/ wallet and a still get you there just not in front of the Patrol that wants to be first no matter what.

Where did that come from? My summary of Patrol drivers I guess.:cool:

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Originally Posted by Bush65

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Unfortunately that was not apparent in your earlier post.

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The egt will vary with how much fuel is being injected to suit the load on your engine. High loads like towing, loaded climbs up long steep hills, accelerating hard up steep hills will push your egt's up.

You should not expect to see peak egt's on average hills, highway driving.

If you set the fuelling to see 600C to 650C pre-turbo, foot flat to floor, pulling a big hill, then that is probably as high as you want to go. As no doubt at a later stage you will encounter a longer steeper hill or will have a bigger load on and the egt will head for over 700 - you don't want the egt that high for very long.

You know when you are pushing it, so keep a close eye on the gauge in those circumstances and back off your right foot, or grab a lower gear when the egt skyrockets.

If you are seeing high egt too frequently on relatively easy hills, then fix what is causing it - not enough air (e.g. faulty turbo, leaking boost pressure) or to high fuel rate.

Edit: IMHO the turbo on 300Tdi's is not good enough if you want much better performance and keep the egt under control.

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well I apologise from my earlier miss communication but I thought by writing this

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(I appreciate its not black and white and everyone will differ slightly)

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you would of known that I understand that...obviously not:)

just read the thermo guard FAQ was very helpful in knowing what I should be looking out for :)

I'm wondering whether to take the car to someone like Berrima diesel to get it tuned once the boost gauge is fitted.

I was given the DIY guide from a nice fella on this site on how to do it yourself but not really sure I want to play around with something that could potentially wreck the engine

Get it done right the 1st time.

Also, sometimes ignorance is bliss. I am sure you know what I mean.
The more gauges the more one worries.

When I started my rotary wing lic(helicopter) I was paranoid, always checking pressures and alt etc can make you paranoid.

Berrima is wicked, heard lots of very good reports from them but be not surprised if they ask for new injectors or pump rebuild or something crazy.
Heard that often too.
Put the old girl on diesel gas and than get it tuned by a good diesel tuner.
It will go like a cut snake.

Ian is not keen on diesel gas I think he feels that running a gas through and engine does not provide enough lubrication...he fully admits though that he has not read into it much.

however the disco will not be getting diesel gas...to expensive we have 3 cars on road and one in a rebuild that sort of money just is not spare..

as for berrima I only heard they were good, I thought about going to graeme cooper but can't bring myself to do it after one of the employees said to us "why would you bring a 90 to Australia what's the point"....a little disappointed hearing that from a place that is supposed to be where the enthusiast takes there car. have not brought myself to use them because of this

Oh I already have new injectors, put them on for ****s and giggles when I had the head done

...Time for a holiday to the great south island you two, bringing the Disco, for a bit of tweaking:):):)


JC

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Originally Posted by big guy

Get it done right the 1st time.

Also, sometimes ignorance is bliss. I am sure you know what I mean.
The more gauges the more one worries.

When I started my rotary wing lic(helicopter) I was paranoid, always checking pressures and alt etc can make you paranoid.

Berrima is wicked, heard lots of very good reports from them but be not surprised if they ask for new injectors or pump rebuild or something crazy.
Heard that often too.
Put the old girl on diesel gas and than get it tuned by a good diesel tuner.
It will go like a cut snake.

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Berrima diesel are the best diesel tuners in Oz,my defender has been to them twice,they do all Toyota NSW warranty work,they are a class act. Pat

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Originally Posted by dullbird

Ian is not keen on diesel gas I think he feels that running a gas through and engine does not provide enough lubrication...he fully admits though that he has not read into it much.

however the disco will not be getting diesel gas...to expensive we have 3 cars on road and one in a rebuild that sort of money just is not spare..

as for berrima I only heard they were good, I thought about going to graeme cooper but can't bring myself to do it after one of the employees said to us "why would you bring a 90 to Australia what's the point"....a little disappointed hearing that from a place that is supposed to be where the enthusiast takes there car. have not brought myself to use them because of this

Oh I already have new injectors, put them on for ****s and giggles when I had the head done

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D/gas makes a big difference,my Tdi loves the stuff.I fitted new injectors at 400,000k's and they didn't do a thing and I have to flog my donk to get near 600 degree's even with the gas. Pat