Timing 6.5

[6.5MADNESS]

Hello. I'm here hoping to learn how to tune. I have a 6.5 in a 94. New electronic fuel injection pump. I need to figure out how to time it. I guess this is going to require a computer program. I'm looking forward to learning from everyone here. I will share anything I know, which for right now won't use up much bandwidth. Haha hahaha. Thanks for reading, fellow truckers.
- Jay

 

[Burning oil]

Welcome.
What part of the southeast you in?
Got any pics of your ride?

Here is a link to the GMTD SCAN tool for 94-95 only. http://leroydiesel.com/products/gmtd-scan-tool-software/

 

[6.5MADNESS]

Hello Burning Oil. I'm currently near Macon GA. Thanks for the message. My
I'm learning to reply here. It won't be long.

 

[BoostN]

Welcome to the site, I'll move this to the 6.5 section so you can get more replies!

 

[Will L.]

Welcome to the site. Speak up about your truck, lots of good people here that an point you in a good direction.

 

[JayTheCPA]

Lets start with the basics: what is the goal?

For timing, there are two ways (really one) way to 'time' the DS4 IP.

The one timing aspect that most people focus on is the physical mounting of the pump (aka TDCO) and 'advance' it as much as possible without throwing an error code. Am in the camp that this has little benefit to a computer controlled IP (and hence the comment about really only one way to time a DS4). Physically advancing the IP's timing is definitely effects how the DB2 (manual pump) works, but has a very limited effect to the computer controlled DS4.

Toward the original post about tuning via computer, this is the best way to manage the DS4's timing as it is dynamic based on data tables. Tuning on your own via computer is definitely possible where only a few actually go this route (to my knowlege, there are maybe 10 people in the whole world (that I am aware of) whom admit to this) due to the steep up-front cost of the software. Most people end up working with one of the paid 6.5 tuners (possibly only one left) to make a change to the programming as it is far less expensive to pay the ~$400 - $500 rather than buy the tuning software and hardware.

So back to the question of the goal. There are people willing to help toward making the motor run as efficiently as possible given its configuration (type of turbo (OE, ATT, Holset), fuel modifications (FTB), etc), but the thread will quickly go quiet if the intent is to make soot.