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If your cruising 65mph @ 1250F I would say that is useful to know .. right ? Or am I missing somethingEGT at cruising speed is not an indicator that's useful. To many variables.
It's peak EGT under high load, heavy throttle you need to work with to tune to the upper limit of what you're comfortable with.
If your cruising 65mph @ 1250F I would say that is useful to know .. right ? Or am I missing something
What do you consider to be sustained high EGTs ? I personally hate going past 1200 at all, but sometimes with a headwind with a slight grade I’m pushing 11-1200 sustained and I hate it .Sure. It's about as useful as looking at the factory temperature gauge, and seeing that it's not in the red.
So cruising is driving along the interstate, keeping a steady pace, part throttle, nothing particularly noteworthy.
If you need to watch your EGTs in this scenario, you have issues that should be addressed. You should be able to enjoy the scenery.
EGTs are gonna max out when you're at full throttle, in a high load situation, not cruising.
example being: loaded with camping gear, pushing hard up a mountain pass, holding top gear, right foot planted on the floor. RPM slowly dropping. You're dumping maximum fuel into the engine. The engine and turbo can't deliver any more air. AFR goes up. Combustion heat increases. Heart soak in the engine, turbo exhaust goes up.
This is when EGTs matter.
Tuning the fuel settings so your peak EGTs don't/can't exceed a safe level means you can ignore the EGT gauge until you are pushing hard under load.
Learn to be sympathetic to your engine.
Down shift when you're full throttle and losing RPM.
Your diesel is happier at higher RPM in a lower gear, at part throttle, rather than struggling to hold ground in a high gear with your foot to the floor. Then monitoring EGTs at these times is just checking that conditions aren't pushing the heart in the engine beyond the parameters you've set.
Short bursts of high EGTs were acceptable to me such as passing a slower rig on a hill. Pushing it into high EGTs for 30, 60, 90 seconds to get past that car before the passing lane ends etc I had no issue with.
I tuned so that 1dawhen pushed hard in normal driving I saw EGTs higher than most, and only if really pushing hard they would cross into a range I was not comfortable seeing as a sustained condition. That's when you watch EGTs
What do you consider to be sustained high EGTs ? I personally hate going past 1200 at all, but sometimes with a headwind with a slight grade I’m pushing 11-1200 sustained and I hate it .
Bearing wear. And boosting the stock turbo beyond its limits.@mudgudgeon what caused the turbo failure? I'd like to keep mine from failing...
Thank you for this, a very comprehensive guide to reading EGT's which helped me better understand what I'm looking at. I recently got an EGT installed at the manifold of my 2L-TE so Im now trying to get baseline readings before I modify the truck any further. Thanks again!Sure. It's about as useful as looking at the factory temperature gauge, and seeing that it's not in the red.
So cruising is driving along the interstate, keeping a steady pace, part throttle, nothing particularly noteworthy.
If you need to watch your EGTs in this scenario, you have issues that should be addressed. You should be able to enjoy the scenery.
EGTs are gonna max out when you're at full throttle, in a high load situation, not cruising.
example being: loaded with camping gear, pushing hard up a mountain pass, holding top gear, right foot planted on the floor. RPM slowly dropping. You're dumping maximum fuel into the engine. The engine and turbo can't deliver any more air. AFR goes up. Combustion heat increases. Heart soak in the engine, turbo exhaust goes up.
This is when EGTs matter.
Tuning the fuel settings so your peak EGTs don't/can't exceed a safe level means you can ignore the EGT gauge until you are pushing hard under load.
Learn to be sympathetic to your engine.
Down shift when you're full throttle and losing RPM.
Your diesel is happier at higher RPM in a lower gear, at part throttle, rather than struggling to hold ground in a high gear with your foot to the floor. Then monitoring EGTs at these times is just checking that conditions aren't pushing the heart in the engine beyond the parameters you've set.
Short bursts of high EGTs were acceptable to me such as passing a slower rig on a hill. Pushing it into high EGTs for 30, 60, 90 seconds to get past that car before the passing lane ends etc I had no issue with.
I tuned so that 1dawhen pushed hard in normal driving I saw EGTs higher than most, and only if really pushing hard they would cross into a range I was not comfortable seeing as a sustained condition. That's when you watch EGTs
I tuned my 1hd-t to run at up to 750-800⁰c, and was comfortable pushing it to 900⁰c for short bursts.
Diesel combustion temps are far lower than what a typical gas engine sees day in day out with lighter pistons, basically the same metallurgy, and no oil spray to cool pistons.
I figure most people are unnecessarily conservative with EGTs in a turbo diesel.
My 13BT runs much the same, for mine i'm limited by the cooling system, couple of minutes at 700c + and water temp starts going up.
Yeah, my 1HDT saw 900c on (rare) occasion and absolutely no evidence of damage. - EGT is not the temp of the piston etc, remember it has ~90C oil from the jets below and a fresh cool air charge coming in above.You guys are pushing your motors to 1400 degrees ?!
You guys are pushing your motors to 1400 degrees ?!