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General 6.7 Discussion (2011-2016) General 6.7 Discussion

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  Topic Review (Newest First)
07-05-2019 09:27 AM
Phil S Update on the bone stock question...Towing 10K trailer.

So pulling a long grade leaving Colorado...went into regen. The lowest temp I could manage was 1275. That was 60mph in 4th. Most of the time it was around 1350...bouncing off of 1400 occasionally.

I only recently installed the monitor so I have no idea what temps I was getting before. I use to just put in drive and let it manage itself. I never noticed it de fueling or cutting power. I can almost guarantee that it was well above 1400 on hills based on the way I have to drive it now to keep the temps down.

I would tend to assume that it is designed to tolerate the higher sustained temps.

As a side note, I have a friend in the construction business that tows an enclosed trailer full of lumber and tools. His 6.7 currently has 280K. He is stock and changes the oil and filters when the dash tells him. Does not monitor temps. He drives the truck a lot harder than I do...very heavy foot. Zero problems so far. This is his 2nd 6.7. The first one lost the trans at 250k due to lack of maintenance...zero problems with the motor or emissions on either truck.
07-05-2019 08:48 AM
mjs2011
Quote:
Originally Posted by MrTommy View Post
I'm guessing that on a stock truck, there isn't much chance of it "melting down". Ford makes sure that isn't going to happen (as do all the other mfg's). It's only when we start making changes that stuff can go wrong.

Just sayin'.
I'm not sure what the 6.7 does in regards to high EGT readings, if it de-fuels or what, but I can tell you that you can absolutely melt down previous powerstrokes in stock form. If you have Boost leaks or intercooler tube failures that you ignore and keep driving on, the truck will just keep fueling and things will get HOT! Ask me how I know.

So that's where my question stems from. If I see say 1100 on EGT1, what does that mean for pre turbo temps. I'm sure someone who has the added EGT probe has noticed some correlation between the two.
07-04-2019 08:23 AM
MrTommy
Quote:
Originally Posted by mjs2011 View Post
Or is it foolish to try to rely on EGT1 as a meltdown alarm on a stock truck?
I'm guessing that on a stock truck, there isn't much chance of it "melting down". Ford makes sure that isn't going to happen (as do all the other mfg's). It's only when we start making changes that stuff can go wrong.

Just sayin'.
07-03-2019 09:38 AM
mjs2011 Don't mean to hijack the thread, but I'm curious to hear from those that have Pre-turbo EGT probes how much hotter they are on average than the post turbo EGT probes from the factory.

If the safe limit is 1350 for extended periods, and you are seeing that pre turbo, what would EGT1 - EGT4 gauges be showing? I reckon they are lower, but by how much? Or is it foolish to try to rely on EGT1 as a meltdown alarm on a stock truck?
07-02-2019 07:08 PM
broncobilly_69 I've been Chatting on FB messenger with One Stop Truck Shop, the vendor I bought my tunes from. In addition to boost leaks, they had me check my coolant level in the secondary coolant system.
Below is what they said about temps.
"as far as temperature goes we normally recommend keeping it under 1350 degrees for extended periods of time if you did go higher than that a general rule of thumb is the higher you go the shorty want to hold it there. On other vehicles with a hotter tune we have pushed in well above 1600 for brief spurts. Situation is like hammering down and getting onto the freeway or getting up to speed or drag racing stuff like that. I personally have gotten up to 1800 degrees during a 30 second or so race with no issues caused from it."

He also said "we can always get a revision for you and try to turn the fuel down a little bit on the top end to see if it helps"
07-01-2019 01:03 PM
MrTommy
Quote:
Originally Posted by Jeffsk7 View Post
What are you using to monitor egts. Anyone ever monitored egts on a bone stalk truck. I'd be curious to see there temps.
I've got a stock 2016 F-350. I hooked up a Banks iDash 'Super Guage' and it reads EGR's not EGT's. Not sure what the difference is. I'm used to EGT's on my 97 7.3 so this is somehow different.

Anyway, I tow a 9k trailer and going uphill here in NV I've seen over 1400, but not always. Usually it's around 1300 or so. On the flats it sinks to 700 or so.
06-29-2019 12:20 PM
broncobilly_69
Egt while towing

Quote:
Originally Posted by Phil S View Post
Stock 250 - monitoring with Edge CTS2. Towing 10K TT. Pulling long hills, I typically drop to 5th and run between 60 and 65. Usually keeps me under 1200. Any slight movement of the pedal will send it over 1300 and can bump off of 1400. Really have to be patient and light on the accelerator if I want to stay under 1200.



Now, when it regens.... on a hill, it's almost impossible to keep it under 1200. Fortunately, the regens are short lived when towing and they don't catch me on a steep grade all that often.


If that is what she runs for temps in stock form, it makes me think these engines were designed to handle 1400 without issue. I would guess that most folks out there towing are not monitoring their EGTs and are breaking 1400 regularly as well. If 1400 was too hot I would think Ford would be having a lot of warranty work to do on melted pistons.
Thoughts anyone??


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06-28-2019 02:16 PM
Phil S
Quote:
Originally Posted by Jeffsk7 View Post
Anyone ever monitored egts on a bone stalk truck. I'd be curious to see there temps.

Stock 250 - monitoring with Edge CTS2. Towing 10K TT. Pulling long hills, I typically drop to 5th and run between 60 and 65. Usually keeps me under 1200. Any slight movement of the pedal will send it over 1300 and can bump off of 1400. Really have to be patient and light on the accelerator if I want to stay under 1200.

Now, when it regens.... on a hill, it's almost impossible to keep it under 1200. Fortunately, the regens are short lived when towing and they don't catch me on a steep grade all that often.
06-28-2019 01:47 PM
Jeffsk7 I have yet to find any boost leaks. Done lots of searching the web and there are no good answers to high egt numbers tuned with tyrant and running the livewire sct egt probe. Lots do seem to have high numbers with this set up and no explanation as to why.
06-27-2019 03:53 PM
broncobilly_69 Im sure the OP is wondering as well, any great ways to track down a boost leak??


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