Base Timing

[Rawze]

You have been reading a bunch of nonsense and listening to morons on the injection thing. Setting BTDC timing on an isx that high (17+ or worse,.. 23+) will cause detonation and you will be looking at cracked pistons in no time. Sounds like it is coming directly from the mouth of some redneck pickup truck tuner who knows little to nothing about a 15-litre modern diesel engine. 17+ and/or 19+ is more like the info for a small old-school yanmar engine or some other tiny thing that does injection on the intake. Those numbers are definitely for a very different, smaller engine.

Next, setting the static timing from 4 to 6 on the injector cam is something else all together than that. Personally, I would not do so. It is never a good thing to try to "fool the ECM" in attempts to make things run differently. You end up with unpredictable cylinder pressures and the ECM will see it and try its damnedest to correct the mistake on a constant basis thinking the injectors are running hot. The end result will be the ECM correcting the timing to compensate for the error. It is not going to just sit back like a dumb shi#t and ignore the fact that it detects a firing angle incorrectly and that exhaust pressures, etc. are out of whack from the cam out of adjustment. It is not such a simple device at all and it uses multiple sensors in combination to detect such things. the actual final injection timing might be somewhere very different than the 2 degrees you have shifted the cam by.