phale
Comp Diesel Sponsor
- Joined
- Dec 12, 2006
- Messages
- 935
After getting some bugs worked out with the software and my computer I was finally able to tune Melissa's 06 cummins tonight. If you are familiar with the Duramax tuning then you will see some things that you recognize and some things that are totally different. I began with a stock tune and a large file from a "box" tuner and compared them. What I saw in the box tuner was that there was amazingly few changes made from the stock tune. The fueling, timing, and rail pressure graphs were horribly peaky and it makes sense after seeing them why the trucks have throttle hang, rail rattle, timing rattle(there was as much as 52 degrees of timing) and other ailments that people complain about. The stock file is just as rough but with less difference between the peaks and valleys. I spent about 2 hours with the stock file smoothing the fueling, timing and rail values. I also turned off the third injection event and added a little fuel to the top end of the fueling tables. On the initial test drive the truck drove completely different from stock or the box tuner. Throttle hang was all but non existent, throttle response was very quick and linear and the truck now has full fueling to around 3500 rpms. We still have a long way to go before we see what all this tool will do for the cummins, but in a short time I took a truck that I did not like driving before and made it much more civilized while still having good power. I look forward to hearing what others have been able to do, and I am going to start playing with the pulling truck tomorrow:evil