08 350 With s&b intake and minimax, dpf off. The chip was like a 250 tune or something close to that. Unloaded down the highway on mild setting I run about 600-700 for egt's. What worries me is when I tow on the mild settings on harder pulls its not uncommon for me to hit 1300-1400. I do kick it down to the no power setting once in awhile just lower those numbers.

On the high or hot setting I can only get a few seconds of wot before the chip starts warning me that it is about to defuel. I have the defuel setting for egt's set at 1500. I dont hardly ever use the hot setting.... but it is nice for passing people occasionally.



What are you guys with chips running while for egt's while towing? Is there anything else I can do to lower egt's? Or do I just need to back off the throttle? The hot setting doesnt bug me too much. Anytime you chip something egt's will go up. But the numbers that I see on the mild and even no power settings seem kind of high to me.

 

Can't answer your question but in a way I can tell you what mine runs. I have the banks and I tow just over stock or in stock only. I don't run higher settings.

In stock at WOT with a heavy load and foot on the floor up long grades about 1350. That is about all I can get out of her.

So I would want a lower number for your defuel myself.

Same as in regen. I will see maybe 1200F.

 

I tow at mild or NO power settings on my Mini Maxx. I get slightly better fuel mileage with the NO power setting.

 

I think over the years here the consensus on the forum is to tow as close to stock as you can. 1500 can't be doing your engine any good. I tow at +35 HP ( lowest setting on my tuner) and my trailer is heavy. Total rig is right at 25,500 on the scale. My EGTs stay mostly below 1250 with a rare 1300. It's your truck but I would suggest you tune back to stock and lower the EGTs. I think that's an available setting on the h&s.

 

These things are made to take a lot of heat due to the regen cycle. 1300-1400 deg F is nothing to sweat. If you want to run cooler, you need to improve air flow. Getting a 4" turbo down pipe, and a 3" cold side intercooler pipe will help. If your wallet can stand the strain get an aftermarket CAC such as the Banks, AFE, Spearco. I think there may be a couple others out there as well.

 

I'm curious why anyone would be towing heavy, up long steep grades, at wot. I generally run about 26K or so and I've never run at wot for anything. I'm not in that big a hurry. That being the case I think the hottest I've ever seen was about 1350 for a minute or two running through WV or VA, don't remember which. Running a 210 HP tow tune btw.

 

Towing with the spartan 210 tow tune you have to try hard to get the truck over 1100*s. I hate the shifting of the tune so I tow stock. Usually see 1250* getting into it. On my 6.0 with a hot tune, I hit 1750*. They can take short bursts of heat, but sustained temps over 1300* is asking for trouble.

 

Thanks guys. Ill keep turning her back to the no power setting. has anyone here put on a bigger down pipe or cold side intercooler pipe? And do you know how much it did help you egt #s

 

I'm running a 4" down pipe, and aFe DP back 4" w/5" exhaust. Even with HOT setting and 100 degrees outside, I can't reach my defuel of 1350. Running empty on the highway at 65-75 mph, my EGT will usually hover in the high 5's to low 6's.

I also love the fact my EGT's will quickly drop to below 300 at idle. Maybe 60-75 seconds after a good hard run.

 

They can keep running with much higher EGT's, but the heads take a real pounding.

Cracks are common from what I gather.

 

I hadn't heard of, or read anything on this forum or the Spartan forum about cracked heads. Did I miss something? From what little I've heard, you don't need to start to be concerned about EGT's til you get around the 1600 def F mark. I agree that you probably don't want to run at 1300 - 1400 for extended lengths of time. Lowering EGT's is always a good thing. The best way to accomplish this is to improve air flow.

 

There are guys that race, that run the EGT's past what the sensor can even read, for intermittent use. (1760 deg ?)

There might be more at play than a basic EGT reading... for EG, during regen, when fuel is getting injected on the exhaust stroke, there is more heat present, and for a much longer duration also.

There are a few threads about hairline cracks and such, look for rebuild threads in particular.

 

Cracked heads are common in the 6.0/6.4 world for both stock and aftermarket.

 

I'm pretty sure that's what happened to a lot of people that had weird coolant issues.

 

So your running a 4" down pipe and the rest is 5"? Would I have any problems with power loss going with 5" turbo back?