5.9L Pulsewidth and Fueling unlocked
One of the biggest single requests we've had since our first public release was to develop additional controls for more RPM's.
Parameters have been modified, added to, changed and pulled in every direction to provide the best control possible. However, it's been a bit of a double edged sword. While RPM controls have been taken care of (remember the 5,400RPM run by Fleece), there have been other factors sitting in the background still limiting the overall results.
These have been Fueling limiters and final injection pulsewidth limiters.
Once our 2012 GM gasser stuff was sorted out we got right back on to the Cummins. Steady progress has been made over a number of weeks. We set about "hacking" an OS and finding a suitable test truck. The test truck came from one of our beta tester's customers, with just one problem - all the testing would be done remotely to the beta tester. Not ideal, but it was a start. Within the first week, the boys had hit the first jackpot - another limiter had been found. But it quickly dawned that there were further pieces to the puzzle, so it was back to the drawing board.
We created some custom PID's in the scan tool to log what was happening within the many limiter routines and several more of our beta testers now had trucks that were able to run our custom OS to speed up feedback, and test on both auto and manual trucks.
Yesterday, with a highly modified OS patch job, and some custom PID's our testers successfully moved to the next level. What they discovered wasn't a commanded fuel limiter as such, but it was limiting fuel.
We now have about 6 trucks (both auto and manual transmissions) running around with unlimited fueling to 3600RPM.
One of our beta testers commented " 3000pw all the way to 3600 rpms! Suffering pressure loss for the first time and that makes me happy!" This truck runs twins, larger nozzles, so I guess it's not really stock.
What this means is that we've now hit the next level of limiters and require the next level of trucks to continue developing these parameters. Stock just isn't going to cut it from here on up! The next limit seems to be kicking in around 3800 RPM and we are working on resolving this as we speak.
The new parameter to stop the pulse width drop will be in our next software release, scheduled for next week. If for some reason it doesn't make the cut for the next release, we'll release a patch once they are mapped out for all OS's.
Below is a screen shot from the scan tool showing on one of these beta trucks that they have now gone past the capability of the fuel system because there is now so much fuel being injected, nearly 3000uS injector pulse time at 3,400RPM.
With this breakthrough it's fair to say that if you (or your tuner) aren't using EFILive then you are going to get left behind because up to now no other tuner has been able to maintain such high injection pulse times to this RPM.
Cheers,
Ross
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Originally Posted by Dmaxink
