I hooked up my trailer -- about 8000lbs the way I had it loaded today -- and went out for a test ride.

The main thing that suprised me was that on long hauls up hills, even with the flip chip in the stock position, I would get into trouble with the EGT's. I never let it go over 1200, but it would have gone that way had I stayed into it.

Would you expect that to happen?

How much difference in EGT's does an intercooler make? Is it like 100's or 10's degrees i difference over not having one?

Thanks,
wRichard

 

I wish I had gauges before I started changing everything. I had my truck with stock injectors and the chip pulled from the pcm, WITH 4" exhaust and 6637 intake reach 1400 degrees pulling a 6% grade (horse trailer w/ 4 horses = ~9000lbs) . I had to back out of it and feather the throttle to get 1200-1300*. I wonder what it reached with the stock exhaust and stock air filter. I think 1250* is a little low, but it is a conservative # that keeps you on the edge when temps get that high. With larger injectors it is crazy how fast the egts go up. I have seen 1500* EMPTY, just messing around.

I have heard that an intercooler should decrease your temps by 150-200*. The 6.0 intercooler is a little better (by maybe 50*) than the 7.3s

 

what mods do you have? my truck won't go over 1200* even with the chip on extreme. stock injectors and fuel though.

 

I have stock injectors as well.


The mods to my truck are:

4 pos chip (stock, +50, +100, high idle)
4 inch exhaust
3.5 to 4 down pipe
tymar intake

Is it possible that if I went to a different chip (I can get my current one reburned with a different tuners programs) that I may be able to get the EGT's lower?

I was pretty suprise to see how high the EGT's went and how fast they went there. It really only happens when going up hills, but since I live in northern california, I am either going up hills or down hills most all the time.

WR

 

I'm not sure whether a different chip would lower egt's but I would think that there are differences in programming between the different makes. Mine is a TS 6 pos w/ stock, high idle, 50,75,100, and 140+. Right now my truck performs the best on the 100 setting, though I usually leave it stock or 50. When I tow I am am pulling anywhere from 6-10K depending on the load size. Even if I leave the chip in 100 or 140 my egt's max out at 1200. The mountain I pull is about 1mi long and I have to drop to 3rd gear (35-40mph).

I am surprised to see difference in egt's as we basically have the same mods. I have gotten rid of my ebpv and switched to a 1.00 housing.. maybe thats something?

I'd be interested to hear other views of our situation.

 

IMHO the wide swings in EGT's may be the location of the pyro probe. It needs to be in an exaust manifold prior to the turbo near the collector. I placed mine in the drivers side manifold 4" before the collector pipe and I have to be towing to go over my 1250 limit but I can do it easily when towing.
I would be very interested to know the answer to Whiskeyriver's original question: how much cooler does an intercooler (charge air cooler) make the EGT's?

 

Whos tunes do you have?
How much boost are you getting?
I have noticed with my truck I usually see 50-100* cooler egts when in my 40 hp tow program compared to stock. It is because there is more boost in the tow program (15psi vs. 10 for example).


97-7.3dump are you talking about pre and post turbo? If whiskeyrichard had it post turbo and was seeing 1300* that would be close to 1600-1700* pre turbo.

From earlier post
" I have heard that an intercooler should decrease your temps by 150-200*. The 6.0 intercooler is a little better (by maybe 50*) than the 7.3s"

 

FormanES, I am talking pre-turbo in the manifold. That way you know the enviroment the turbo is living in!
S

 

This is going to sounds crazy, but for the life of me I cannot remember that software that I had installed on my chip.

At the recommendation of Dale Isley, I choose between two different tuners, but I'll be damned if I cannot remember who/what they were. I am pretty sure the programs (4 of them) I picked were from somebody that started with a T. I'll have to call Dale and find out what I bought. Kinda a dumb *** move, but oh well.

My EGT guage is where it is supposed to be, in the exhaust manifold.

I talked to Dale today and was asking about the EGT's. I told him I was towing in higher gears at lower RPM's. He told me to down shift and drop a few MPH and the EGT's should come down some.

I am looking at either getting an intercooler or a boost cooler. I have questions about the boost cooler, but am going to start a new thread about that.

WR

 

Tony Wildman and Jody Tipton?