Engine Exhaust gas temps

[Greg Roles]

Thats a good start!

Just as an example of how different sustained temps are: We had to build an exhaust extraction duct for the dyno this week.

We have been running a 1.4 Twincharger on the dyno for 4 days, we have probaly done 60 + power runs (similar to what you do on a dyno day) - we then did one EGT load run, about 45 seconds full throttle.

That one run melted our high temp insulated exhaust ducting two feet from the exhaust

What temp did you see Guy?

[Guy_H]

Will check with the calibrators on the twincharger engine. Its a different beast altogether!

[kryten2001]

Hey Andew - get on the Autobahn & hold it flat out for 10 minutes!

If only... *sigh*...

It's not like the good old days when you could actually get away with a bit of lunacy on the roads. Now speeding, and breaking into peoples houses are considered equally bad. Stupid really.

250kw from bluefin hey... Nice numbers, wow.

Strangely enough the KW aint what's lacking.. I'm no guru in this area, but something I've really noticed is just how much slower the car is with passengers (like noticably). With 430nm of torque on tap, this shouldn't really be the case, should it?

I'd be interested to put it on a local dyno here to see what numbers are being developed. Maybe Torque is being limited through the gearbox in low gears, I dunno...

It certainly feels like huge horsepower, but the torque figures don't seem to equate to how it bogs down on the road once you get a passenger or two inside.

It's still crazy quick, don't get me wrong, but the difference is quite considerable.

Getting depressed. Running out of things to do to it, and the poor little yellow bugger is only 6 weeks old.

[gregozedobe]

Getting depressed. Running out of things to do to it, and the poor little yellow bugger is only 6 weeks old.

This is what happens if you don't pace yourself - you get used to what you've currently got, but don't have any improvements to look forward to. I feel so sorry for you (NOT)

[kryten2001]

This is what happens if you don't pace yourself - you get used to what you've currently got, but don't have any improvements to look forward to. I feel so sorry for you (NOT)

Yeah maybe some BBS wheels and that intercooler might be in order.

Getting into the law of diminishing returns now though. All the good mods that add huge value have been done.

[anthony_VWJET]

Yeah maybe some BBS wheels and that intercooler might be in order.

Getting into the law of diminishing returns now though. All the good mods that add huge value have been done.

Kryten, if you don't mind me asking? What the he'll do u do for a living? Why does it seem you've got all this money on tap to use? Just curious that's all..whatever it is I need to be doing what u do.. The design industry isn't going so well and I may need a substitute for now until things pick up.....

[kryten2001]

Kryten, if you don't mind me asking? What the he'll do u do for a living? Why does it seem you've got all this money on tap to use? Just curious that's all..whatever it is I need to be doing what u do.. The design industry isn't going so well and I may need a substitute for now until things pick up.....

I just saved/invested over the last few years whilst everybody else was out buying plasmas and houses - and I'm not too scared to spend some now.

Plus I'm probably a bit older than most on here.. Pushing the big four-oh.

I've wanted to hot a car up my entire adult life, with no real budget constrictions to force compromise, and I've previously either not been able to afford it, or owned garage queens that were never touched - or rarely driven. So now I'm enjoying myself a bit.

My predetermined goal was to buy the best of whatever particular 'thing' I was looking at (be it brakes, suspension - whatever), but virtually every cent had to be spent on genuine performance parts. I hate riced up blinged cars... So that's where I'm at......

Trust me, not having to save up for rent/buying a house/paying c-card bills leaves a lot of money for a middle aged management farts to spend on toys.

[Greg Roles]

...and too much time to hijack threads on EGT's! Sound advice though, go add your bit to the income thread on general chat mate, a good message for the young'uns. 40 ISN'T old damn it, 69' version here too.

[BarneyBoy]

The design industry isn't going so well and I may need a substitute for now until things pick up.....

I know what you mean, ant... sucks, don't it?

Hey I was in design within manufacturing(!) until the week before Christmas.
Talk about a double dose of dismal!

Sorry for the jacking, girls

[POLARBEAR666]

Thats a good start!

Just as an example of how different sustained temps are: We had to build an exhaust extraction duct for the dyno this week.

We have been running a 1.4 Twincharger on the dyno for 4 days, we have probaly done 60 + power runs (similar to what you do on a dyno day) - we then did one EGT load run, about 45 seconds full throttle.

That one run melted our high temp insulated exhaust ducting two feet from the exhaust

I just peee'd a little bit.... what are the results... whats the goss... sorry to go off topic. APR TUne?????

Are the EGT temps super high stock and then go even higher a bit with a tune on a TSI. I am wondering about my heat wrapping of header and turbo and dump.... there are 2 schools of thought.. the one says that thermal load increases because temps inside the header go up... then the other school of thought says that the EGT's do go up... but you protect the bearings and center housing of the turbo from heat soak and therefore the water and oil are far more functional and keep it cooler at the join... where turbo's get damaged.

I tend to subscribe to the later as HEAPS of turbo cars have long life running turbo bags on the back end.

[Guy_H]

We were looking at the TSI EGT's today, but the scale is not corrected into a celcius equivelant.

There are several hardware protection schedules in the programming to reduce load / cool hardware under certain conditions.

They spent a couple of days on the EGT control alone to have it mirror stock.

[POLARBEAR666]

We were looking at the TSI EGT's today, but the scale is not corrected into a celcius equivelant.

There are several hardware protection schedules in the programming to reduce load / cool hardware under certain conditions.

They spent a couple of days on the EGT control alone to have it mirror stock.

Yes... i have noticed that my car absolutely hammers on cold days but on a slightly hot day after running around for a bit it feels VERY sluggish after 4000.

I noted that the fuel trims were like +6 , +7 , +8 kinda numbers in each zone.

Do you think that heat wrapping the header/turbo/dump would produce EGT's so hot that the computer was almost always in protection mode Guy?

[TDI DSG]

Where are you guys measuring your EGT pre or post turbo ?
Where does VAG com get its reading from ? Is it only on DPF equipped cars as they have sensors for measuring when regen is required ?
I have played with a few diesel chips - they all increase EGT by adding more fuel. This extra heat is what drives the turbo - hence very little boost at idle or light throttle regardless of RPM as there is not much fuel (heat).
800+ degrees even pre turbo is a lot !!
I have a pyro on my other TD car but not the golf yet. Might have to put one in soon.

Cheers

[Guy_H]

Sorry - forgot about this post!

The EGT's are modeled based on ignition timing / air fuel ratio / Mass Air flow - this is verified for each engine type with a thermocouple to check the model & they found that it only varies a max of ~ 20 Degrees C per 1000 deg C.

[Greg Roles]

Where are you guys measuring your EGT pre or post turbo ?
Where does VAG com get its reading from ? Is it only on DPF equipped cars as they have sensors for measuring when regen is required ?
I have played with a few diesel chips - they all increase EGT by adding more fuel. This extra heat is what drives the turbo - hence very little boost at idle or light throttle regardless of RPM as there is not much fuel (heat).
800+ degrees even pre turbo is a lot !!
I have a pyro on my other TD car but not the golf yet. Might have to put one in soon.

Cheers

Well the bottom line is I'm not 100% sure, but as there are three temp probes in the TDI GT, one pre turbo, one on top of the DPF and one just after the DPF, I'd hate to think the turbo is seeing higher than the 819 spike I've measured to date. I have an EGT gauge about to go in, just need to drill a hole and weld the probe. It will be going post turbo though.