What does this statement mean?????? Got to remember im a virgin dodge cummins owner.........hahaha
Starting in 2004.5 the emissions got stringent enough that the truck was tuned with emissions in mind, not how Cummins would have made 325hp without the EPA.
In a nutshell Cummins was able to meet Jan 1, 2004 emissions by a mixture of hardware and tuning. The tuning reduces cylinder pressure, which forms NOx. The reduced cylinder pressure comes from reduced timing, the reduced timing means that the EGT's are hotter but the cylinder temps and pressures are lower, the increased EGT's also helps the catalytic converter function.
A bone stock 2004.5-2007 truck has no problem hitting 1450° EGT's and holding them while towing. If you were to load up a tune on your truck and run 1450° while towing there is a good chance you would melt a piston. This is becuase the good tunes for the 2004.5-2007 trucks correct the retarded timing profile, by advancing it. Advanced timing leads to increased cylinder pressure, increased cylinder temperature, more hp per gallon burned, better economy, and lower EGT's. So a properly timed truck at 1450° is putting a LOT more heat into the piston than a stock timed truck at 1450°.
So gauges on a stock 2004.5-2007 doesn't give you a baseline, or show you temps that are safe to run with a tuned truck. If you fully understand this, or don't plan to tune the truck then fine but realize you will be above the max safe value quite often, because people refer to pre 2004.5 max temps as the max safe values.
When you start adding power (tuners and stuff) your EGT (exhaust gas temperature) will run hotter due to the increase in injection timing and fueling, especially crucial (if you bumped up your power) when towing to keep an eye on your gauges, EGT's tend to run hotter.
Also when you start adding power, this makes the turbo spin faster, ie more boost, and all other working parts of the truck are stressed a little more.
As stated above an increase in timing generally leads to lower EGT's (until we get into effects on spool, and other custom tuning issues.. let's not go there, yet...).
Any truck from 2004.5-2012 (too little known about 2013+, but I gather they run more timing stock with SCR) that runs a tune with advanced timing will see lower EGT's for the same amount of fuel. The stock timing is SO low, that you send a lot of heat out the exhaust, instead of into the piston on the powerstroke.
On stock fueling and timing alone a 2004.5-2007 truck can pick up about 40hp/100ft/lbs at the rear wheels and drop EGT's by about 200°, more or less depending on elevation. That is 100% stock fuel, nothing added but timing.
Peak boost can also go down for the same fuel with increased timing, because the heat is used to make hp and not wasted in the exhaust that drives the turbo harder.
The 2007.5-2012 6.7's are the same, but I don't know the exact numbers.
In 96-98 stock timing peaked at about 14°. In 2004.5 stock timing peaked at around 6° (the full table goes to 9.1° peak, but the fueling/timing table goes higher than commanded). Timing in used areas of the map goes as low as -9.5°, and WOT at 2,000 rpms (towing) is around -6.5°, that makes for a late, high EGT burn, with lower efficiency. On stock injectors and full stock stock fueling timing is better peaking around 18°, increased power, economy and decreased EGT's.
You have deletes, if you are running hotter with deletes than you were without them then you are running too hot.