ADVICE ON EGTs

[IAdie]

Looking for advice on keeping EGTs down. I have a stock 2500 auto with hwy gears. The only mod is the Walbro 392 fuel pump. When I tow my 7000lb trailer and over the hills the truck gets to 1200 very quick, dropping down a gear helps but I need something that enables me to maintain a decent speed and keep the temps down. I spoke with Dynomite Diesel and they said go with a 4 inch exhaust and 60hp ddp injectors to start with. Has anyone have just that combination? Looking for ideas, do not want to break the bank.

 

[JLandry]

IAdie,



What differential axle ratio does your truck have? 3. 54:1?



I ask because my truck used to have a 3. 54:1 axle ratio, and when I pulled my travel trailer (which weighs about 8500 pounds loaded) I used to see high EGT's when trying to climb anything but the slightest hills in 4th gear (OD). The engine was essentially lugging under this condition and the EGT's would climb without any appreciable increase in power. I was forced to downshift and spend a lot of time driving in 3rd gear in hilly terrain and even when towing into a stiff headwind. I should add that I had a 4" exhaust system... that won't help.



Then I had the axle ratio changed from the original 3. 54:1 to the factory optional 4. 10:1, and all I can say is WOW! It's like driving a completely different truck. Now I can leave the transmission in 4th gear on all but the steepest mountain grades and still keep the EGT's within limits. In short, the axle ratio change made towing a pleasure.



Of course anything you do to increase available engine power is going to help, but you have to be careful not to overload your stock transmission... it's only designed to handle a ceratin amount of engine horsepower. On the other hand an axle ratio change avoids that problem.



A few weeks ago I finished a trip towing my trailer from the Seattle area to Death Valley, CA and back... with many steep mountain passes in between. I averaged about 11. 5 mpg for the trip.



Also, if you haven't done so already, invest in a good exhaust brake and a transmission lockup controller... once you tow with them in mountainous terrain I guarantee you'll never go without them again!



I hope that helps,



John L.

 

[MA2LA]

A good place to start would be a good air filter setup, the next would be to do the "mystery switch" converter lock up. When I did mine I was able to keep the converter locked up in 3rd and it was a great and was about a 7 to 8 mph diffence at the same rpm. putting more fuel wount help you problem. and ya a good exaust system helps as well

 

[Forrest Nearing]

I wouldn't worry about it... 1200 is alright. the truck is factory stock.