I have no idea how all the electronics, or the science of it works, but i've been told it is the or one of the most advanced systems of timing/tuning out in most any car.
We really don't have anything to worry about, it all controls itself apparently. That's where there's no need for A/F gauges, EGT gauges, etc. We just need a boost gauge and that's it. In the Turbo E46 M3s they have boost and A/F gauges, that's it. The turbo kits for those cars are $40k, so they better damn well be safe and do the trick. Most of them are putting down 800-850whp on 91 craptane w/ meth @ 23 psi I believe. That's it.
If I were to run a 75-100 shot then a lot of the variables would change...the car can't control all that, unless I sent it to Active Autowerke in Miami and had them put on the nitrous file, then things wouldn't be as bad.
Again,
I dont know everything there is to know about tuning; I dont really know much at all.

But after reading up on the DME stuff with the E46 M3's computer, I was pretty impressed. The timing system is extremely sensitive, and when say sensitive and intricate I mean its $5k to replace if it goes bad. It better do it's job.

As far as lean conditions go, i'm not sure how all that is controlled, but I do know that after reading on the board some, meth/alky injection setups don't have people worried much on there due to the layout of this machine. Why? I dont know, maybe they're just idiots haha, good possibility. But I have yet to come across any threads in the past year where someone's motor has blown due to a failure in the system, I hope that counts for something.