EGT level at 120kph

[TieMyShoe]

Just curious, what EGT levels are you guys hitting on the freeway at 120kph and at idle.

Just looking a for a baseline so I know what to shoot for while tuning the pump/turbo

[DeliTan]

Temps will vary widely based on the thermocouple installation. I suggest you post a pic and description of the installation and hardware used, so people with a similar installation can reply

john

[Growlerbearnz]

My EGT probe is in the manifold where the EGR used to be (before the turbo).

Idle is 200-300F, driving around town 400-500F, highway at 100kph is around 700F, and it'll approach 1000F on a long hill.

My EGTs are a bit lower than normal because I'm running 16psi boost.

[cosmo727]

Here's my EGT at 100 km/h.

Approximately 800 degrees F at 2300 rpm on a flat run. 2" lift with 31" mud (not all-terrain) tires. Pre-turbo (EGR blanking plate) installation. 9psi boost. Coolant temp is a little on the cool side. After changing the thermostat I will post back.

[TieMyShoe]

I've been fighting with my buddies van for a while now... Pre turbo thermo couple autometer gauge mounted on the EGR blanking plate. It's pulling 1200 degrees with no effort at all on the freeway and idles at 400. Granted this is good compared to when the van was purchased. It spiked 2000 degrees and was spitting flames the day it was purchased... Since then here is what I have done.

replaced air filter/fuel filter
adjusted the timing
Put the injectors on my test bench, dismantled them, sonic cleaned and re-shimmed them all to 125bar crack pressure. spray patterns are all good no drip issues.
Turned the base fuel screw down to the point the truck is sluggish off the line
Adjusted the boost compensator for less fuel
Boost is running 16PSI
valves have been set
all manifold/boost/exhaust leaks have been repaired
2.5" turbo back side exit exhaust

yet it STILL pulls these rediculas EGT #s...

Here is what has me slightly confused though.. retarding the timing should lower EGT, however this van its the opposite. Advanced lowers, retarding raises (900 at idle...)

Honestly I'm starting to wonder if the thermo couple is bad... or am I just blind to something?

[alti2d]

For the 5 speed crowd

1992 L300 5 speed low roof with roof basket
31" tires on 2" lift
Boost to 11psi
Sea level/Abbotsford elevation
K&N filter, snorkel
Pre turbo, EGR blanking plate EGT installation
100kph about 900-1000 flat and level 3100rpm (it's a 5 speed). Doesn't go to 120 easily....
280 idle after long warm up or long cool down 750rpm.

20 mpg (US) FYI

[Growlerbearnz]

1200F is ridiculous. I'd expect a *lot* of black smoke and high coolant temperatures. I'm thinking it's a broken/inaccurate gauge, but check your timing first:

You've got your thinking on timing backwards- diesel injection timing works opposite to gasoline engine spark timing. Diesel injection advance makes for cooler EGTs.

Advanced injection timing makes the diesel burn earlier and faster, meaning there's less heat left during the exhaust cycle. It also puts more stress on the crank and pistons and more heat into the block and head, so be cautious.

Retarding injection timing makes the diesel burn slower and later, meaning more heat out the exhaust. Retard the timing too much and it can still be burning inside the exhaust, which is less than awesome for power production.

I found a great article on diesel timing/tuning vs economy/power. It's a .pdf, sorry: https://drive.google.com/file/d/0BwN1-I ... sp=sharing

[TieMyShoe]

Currently the timing is set advanced, there is no smoke at all even on heavy throttle it burns completely clean and the coolant temps stay right in the same area as my van does.

guess I'll try a different gauge in it.

[Growlerbearnz]

Ok, that really does sound like a broken gauge.

The gauge and sensor were bought at the same time, right? One of them hasn't been changed in the past? I recently came across an inexpensive EGT gauge that used a type-N thermocouple sensor, while most use a type-K. Fitting a type-N gauge to a type-K sensor would cause the gauge to read higher than it should.