Thread: TD5 EGT, How high does yours get!!!!!!

prefer to invest to a madman with sensors

I just did this and was shocked at my EGT readings - can eaisly get past 750 after 20 or so seconds on the loud pedal . I'm changing my driving style.

Originally Posted by cols110
Does anyone have experience of how much a free flow exhaust brings down the EGT and how loud a 110 is without a cat and centre box.

Cutting out the center box does very little to increase noise - just sounds better but no drone to speak of, I think the turbo spools up a little faster too. As I did this before the EGT sensor I don't know what difference it would make to EGT.

I'm running....

2006 TD5 110
Larger intercooler
Upgraded hoses
3" exhaust (no center box)
EGR removed
EGT in manifold just before turbo
BD Chip upgrade
disconnected the MAF (on advice - apparently only used to control the EGR (?) which I no longer have)
Safari snorkel with air ram top fitting

at around 120kph on the flat, 30 C ambient, EGT is <500 C. Start climbing a hill and it will rocket. Ease off change down and it will sink like just as quick. I think my Chip may over fuel when at high demand. Off road I've never had an issue - just when gunning the landy to get somewhere fast. I never tow. I should hook up the Nanocom and get some better figures for all of this.

Originally Posted by Dougal

A free-flow exhaust will help shave a few degrees of your EGT, but it's not the cure for dangerously high EGT's.

Thanks mate, thats what I figured, if there was an noticable difference I would happily give it a bash, but without doubt the root cause of the problem is over fueling.

Originally Posted by Benny_IIA

Not very loud they have a much nicer note though, it is a very common mod to td5s here in australia.

Thanks all, if there was an appreciable EGT drop I would do it tomorrow, but as the gain is marginal at best I might wait until I go to the UK next and pick up a proper de-muffler centre section without butchering my existing exhaust so I can convert it back to standard if I find it a little loud. With the VNT turbo spool up is not an issue, so the performance side of things is not a real concern.

Originally Posted by mools

Cutting out the center box does very little to increase noise - just sounds better but no drone to speak of, I think the turbo spools up a little faster too. As I did this before the EGT sensor I don't know what difference it would make to EGT.



I just did this and was shocked at my EGT readings - can eaisly get past 750 after 20 or so seconds on the loud pedal . I'm changing my driving style.
I'm running....

2006 TD5 110
Larger intercooler
Upgraded hoses
3" exhaust (no center box)
EGR removed
EGT in manifold just before turbo
BD Chip upgrade
disconnected the MAF (on advice - apparently only used to control the EGR (?) which I no longer have)
Safari snorkel with air ram top fitting

at around 120kph on the flat, 30 C ambient, EGT is <500 C. Start climbing a hill and it will rocket. Ease off change down and it will sink like just as quick. I think my Chip may over fuel when at high demand. Off road I've never had an issue - just when gunning the landy to get somewhere fast. I never tow. I should hook up the Nanocom and get some better figures for all of this.

Thanks for the feed back. My problem is off road I have my foot flat on the floor for anything up to 30 seconds with the engine sitting on the limiter trying to climb a decent dune or out of a big bowl, this is the real concern, backing off some times is not a real option when you are just trying to climb out of a big hole.

After killing my engine once I am not real keen on doing it again in the near future.

Originally Posted by fatman

So everything is up to the tuner-man.
On my occasion,black smoke occurs on specific revs and/or throtle positions,so it can be fixed if it was a "generic" problem,it would generaly be a smokey disco..
I know the topic started for EGT's,i've read that too much fuel=too much smoke=too HOT AND DANGEROUS.. so i got worried..
I prefer to invest to a madman with sensors for boost pressure,egt's,cooling temps etc,cause nanocom reads form current sensors,i'd like a second opinion on readings , than to invest to a bigger intercooler that might be an overkill expence for a stage 1 tune with normal boost pressure,what everyone else thinks?
Thanks.

If you want your remap tweaking to help with smoke emissions, Just drop me an email, and I'll make a new file for you FOC.

I susspect fuel quality is an issue here, that's maybe been overlooked?

High sulphur diesel, or at least diesel with a lowish cetane value, will burn more slowly, and so will produce more particulate matter (soot). If you guys are seeing RRS, D4, FL2, etc that are black smoking, this almost proves my theory.

As stated previously, the key to clean running is all about getting the right fuel/air ratio, but cetane also plays a role here too. If you use a cetane booster (fuel additive) then chances are, you would get a cleaner burn, and hence more torque from your engine, since the fuel is burned during the power stroke. Getting the ratios right, will also lower EGT.

No smoke, No poke is deffinetly a Hick thing! If you have smoke, you need to either increase air (boost/volume),or decrease fuel, to make the balance right. With plenty of boost and fuel, it'll go like stink, and be stable at prolonged high load too!

Take a look at the Le Mans 24 TDi race cars, not a hint of smoke, but a bloomin big turbo to ensure they can get the fuel in, to make big numbers.

The TT VNT turbo is too small for making big power on a Td5. Very nice to complement a stage 1 tune though.

Best Regards,

Gary.

Originally Posted by Alive

If you want your remap tweaking to help with smoke emissions, Just drop me an email, and I'll make a new file for you FOC.

I susspect fuel quality is an issue here, that's maybe been overlooked?

High sulphur diesel, or at least diesel with a lowish cetane value, will burn more slowly, and so will produce more particulate matter (soot). If you guys are seeing RRS, D4, FL2, etc that are black smoking, this almost proves my theory.

As stated previously, the key to clean running is all about getting the right fuel/air ratio, but cetane also plays a role here too. If you use a cetane booster (fuel additive) then chances are, you would get a cleaner burn, and hence more torque from your engine, since the fuel is burned during the power stroke. Getting the ratios right, will also lower EGT.

No smoke, No poke is deffinetly a Hick thing! If you have smoke, you need to either increase air (boost/volume),or decrease fuel, to make the balance right. With plenty of boost and fuel, it'll go like stink, and be stable at prolonged high load too!

Take a look at the Le Mans 24 TDi race cars, not a hint of smoke, but a bloomin big turbo to ensure they can get the fuel in, to make big numbers.

The TT VNT turbo is too small for making big power on a Td5. Very nice to complement a stage 1 tune though.

Best Regards,

Gary.

Interesting read, I know we have crap high sulpher diesel out here in Dubai, it maybe one of the contributing factors as to why I am getting a lot of smoke and high EGT, with better quality fuel as they have in Europe it might be a different story with the same map I am running.

Thanks for your input.

Originally Posted by cols110

Interesting read, I know we have crap high sulpher diesel out here in Dubai, it maybe one of the contributing factors as to why I am getting a lot of smoke and high EGT, with better quality fuel as they have in Europe it might be a different story with the same map I am running.

Try adding a bottle of 2-stroke oil to your next tank and see if that makes a difference?

In SA we have 500ppm & 50ppm diesel. I only use 50ppm in the Puma and the Audi and I add JASO-FC 2-stroke oil every 2nd tank (1:200 ratio). Every 1000km or so I chuck in a bottle of Wynns or Everon diesel injector cleaner.

Both vehicles run super smooth, with one LR Technical Manager saying it is the smoothest Puma he's driven so far. Needless to say, I omitted to mention the 2SO factor

The Wynns diesel injector cleaner is very good. Once we put a tank of contaminated diesel in the Audi and it was idling rough, misfiring, sluggish, etc. Audi removed & cleaned the tank but the problem still persisted. I put in a bottle of Wynns and 100km later the Audi was performing as it was when brand new!

Also, remove the cat and middle silencer box makes a world of difference. Did it on my previous Disco2 and will do it on the Audi & Puma when they are out of warranty

Originally Posted by Alive

If you want your remap tweaking to help with smoke emissions, Just drop me an email, and I'll make a new file for you FOC.

I susspect fuel quality is an issue here, that's maybe been overlooked?

High sulphur diesel, or at least diesel with a lowish cetane value, will burn more slowly, and so will produce more particulate matter (soot). If you guys are seeing RRS, D4, FL2, etc that are black smoking, this almost proves my theory.

As stated previously, the key to clean running is all about getting the right fuel/air ratio, but cetane also plays a role here too. If you use a cetane booster (fuel additive) then chances are, you would get a cleaner burn, and hence more torque from your engine, since the fuel is burned during the power stroke. Getting the ratios right, will also lower EGT.

No smoke, No poke is deffinetly a Hick thing! If you have smoke, you need to either increase air (boost/volume),or decrease fuel, to make the balance right. With plenty of boost and fuel, it'll go like stink, and be stable at prolonged high load too!

Take a look at the Le Mans 24 TDi race cars, not a hint of smoke, but a bloomin big turbo to ensure they can get the fuel in, to make big numbers.

The TT VNT turbo is too small for making big power on a Td5. Very nice to complement a stage 1 tune though.

Best Regards,

Gary.

There is a dyno of the IRB BAS td5 running 210bhp with a TT vnt.

I have a vnt on mine with a Hot map It only smokes coming on boost under load or when you select the wrong gear and let the vnt do the work rather then change down.

G'day all, just a bit of feedback regarding my high EGT problem.

The plonkers who rebuilt my engine late last year were the root cause of the issue, they made multiple major blunders on my engine, one of them requiring me to replace the crank. During the strip down of the engine there were valve marks in the pistons, I ran a DTI over the pistons & confirmed the piston protrussion was correct for a 2 hole head gasket and concluded that they stuffed up the cam timing when they rebuilt the engine allowing the valves to kiss the pistons.

This time around with the correct cam timing my EGT is looking sweet, with an ambient temp of approx 40 deg, at 120 kph I now have an EGT of approx 450, at 100kph my EGT is now closer to 420-430. The issue of excess smoke has now been cured as well due to the fact my engine is now burning the fuel in the engine & not the exhaust. The moral to the story is not to let a so called expert carry out what happened to be a dodgey engine rebuild.

Thanks for all of the earlier advice concerning.