Comparing EGTs of different injectors...

[zman]

I'm considering replacing my stock injectors with some that have a little more punch. I have seen lots of comparison charts for HP and torque, but have never seen anything that shows EGT differences. My concern is heavy towing (10k or more).



Anyone out there have good data on the the EGTs generated by the different injectors, when under the same heavy load? Thanks!



Steve

 

[Partyat33]

Can't give you any comparison but I can tell you with stock air filter, the EZ (with elbow) and the Bully Dog Step II injectors I pulled the mountains of Tennessee accelerating and toping the hills at 75 plus at roughly 17k gross. EGT's still in control at 1200 to 1250 depending on how fast you want to accelerate.



Hope that helps.



Dennis

 

[Archive]

I just got home last Sunday from towing my hay again. A bit over 11,000lbs. My EGTs did not go above 1000 until I would turn on the BB. With the box on, I could accelerate at will up any of the hills. I drove from Pendleton, Oregon to Seattle.



Check the signature for what I have done to my Ram.

 

[Todd T]

Steve I had the same concerns with my truck, when I added the Bully Dog step 4's. I HAVE to haul firewood every year or we will get real cold in the winter. I haul it up from missouri about 5 hours one way, up and down hills the whole trip. We bring back two 6-7000lb loads each year. I was worried that the "hotter" injectors would prohibit me from doing that. If it had, my wife would have shot me, I can here her now, "you mean you bought that $30,000 truck, and all that stuff for it, and it cant even haul our firewood"



Not the case, I have towed my little compact tractor around several times with these injectors and the truck only runs about 50F hotter than before. it has a lot more power too. i think because there is so much more power it gets up to speed quicker and easier so you dont stay in the throttle as deep, or as long.



as for firewood, we are going down next thursday to haul a load up.

 

[Shooter]

How much power do you plan on adding. DD1's will increase egt a little more than DD2's, 2's will smoke more than 1's at low boost.

The 2k1's have completely different egt charicteristics than a y2k. At higher altitudes the egt's will increase.

My experience has been that an EZ will lower egt's.

You will have to increase boost with most any power enhancements to keep the egt's in check.

Increasing my boost from 20# to 26# with my DD1's lowered egt's 150*, from 1250 to 1100 at 6k to 7500 ft. With DD2's and 36# boost egt's run 1300 at altitude and 1100* at sea level.

 

[work2muchplay2little]

zman, kind of a tough question to answer in a straight forward manner. Lots of variables involved. Let's look at this like this; things that increase EGT's and things that decreased EGT's. Y'all please feel free to add any I missed .



Increase EGT's

larger injectors

stock boost levels

stock exhaust

lower rpms (to a point)

fueling boxes

higher ambient air temperatures

higher speeds

bigger loads

head winds

greater wind resistance

racing PSD's and DM's



Decrease EGT's

better airflow in, ie psychotty

bigger turbo/more boost (to a point), ie HX-40 or Piers new HX-35

4" exhaust

higher rpms (to a point)

cooler ambient temperatures

smaller loads

less wind resistance

lower speeds



So someone who consistently tows similar loads, same route, temperature, and all other things being equal except change in injectors will have some solid answers here. Just some more stuff to consider... ...

 

[fj40charles]

I heard DD2's will smoke less than DD1's because of better spray pattern. Can someone confirm? I've got DD1's and I think I might want to go with DD2's, but not if it will smoke more. I can

produce enough smoke with DD1's and a boost module when I really get on it.



Charles

 

[Millfly]

Brought a 15K trailer over the mountains from New York. Have Bosch 275's, VA and hit 1250 going over the mountains.

 

[zman]

Thanks!

Thanks to everyone who has responded to my post. I'm not looking at anything bigger than the equivalent of DD2s. I'm currently 3" straight piped and have replaced the HY35 with an HX35/12. I'm also running the EZ on the most aggressive setting. I'm considering a 14cm housing and going 4" after the downpipe. I have a bit of a lag at the low end since installing the HX35. I'm hoping that the bigger injectors will help overcome the lag, especially if I go with the 14cm housing.



It would be nice to keep EGTs in the 1100* range when pulling the average hill around here with a good load (10k). That would give me a bit of breathing room on a really big one. No mountains in my area to worry about, but lots of 1-2 mile long grades that will get EGTs up pretty quick.



Keep the comments coming!



Steve

 

[Fred Swanson]

zman,

the DD2's are a good mix with an EZ. The 14cm turbo housing may produce more lag, that you may not want. I have run with the DD2's and EZ through different states and can hit 1200 on long climbs and the RPM's coming down before downshifting out of overdrive. This is towing 10,000.

With DD2s and the EZ you will get smoke if you give too much throttle from a stop. You may even set the EZ on #2, and this makes it slightly less.

Where you live and your outside conditions influence what kind of performance you'll get out of an injector you choose.

DD2's wouldn't be a bad choice. But I wouldn't go anymore than that on an injector and do what you say you tow. A modified HX35 will help the lag and EGT's, too. Then the 14cm housing may be a better idea.