My friend is looking for some advice on how to get the most power out of his truck. Its an 02(I think) inline 6 Cummings.

The truck is totally stock other than an upgraded exhaust and some sort of tuning chip/logger (not sure what it is). The chip allows control of boost and also displays egts, boost, etc...

I have experience tuning gasoline turbo'd engine but not diesel engines. I have the understanding that its almost impossible to cause detonation. You are supposed to turn up the boost until you no longer notice smoke coming out of the tail pipe (this means its no longer running rich)?? If you turn it up past this point, you are not going to make anymore power.

Would turning it up past the rich point just increase the EGTs? What is the limit the EGTs should not exceed? How much boost does this truck run stock? Roughly, how much boost can the stock injectors keep up with? How much boost can the stock turbo hold?

To make more power, this will require: bigger injectors. To make even more power, he will probably have to get a bigger turbo and bigger injectors?

What are some other good supporting mods for this truck?

*EDIT*: Do you turn up the boost until it stops smoking @ WOT pull or while taking off from a stop? I would think it would be from a pull...but I haven't seen a truck constantly smoke @ WOT.

http://www.bankspower.com/

try going there if i had a truck i would only get stuff from there

Bully Dog has really good stuff for the Cummins. From my experiences there's not much to tuning them, basically the box, then do 4+ in. exhaust, intake, and injectors. Then think about upgrading the turbo.

well i think curtis pretty much summed it up in the other one but i agree that banks power will give you some great products. if you check out their website you'll find a dodge durango with a cummins that beats a corvette in a race. it's the fastest street legal pickup truck, the fastest street legal diesel pickup truck (obviously). it goes 220mph or something.