Can you spell R-I-C-E? And can you spell - B-L-O-W-U-P the exhaust system and probably the turbo?
There are legitimate reasons to retard timing and dump fuel in racing applications on turbo engines. This is ALS, or turbo anti-lag system, also known as a "bang bang" system. The idea is to use the fuel dump timing and ignition timing retard to create a controlled explosion that will keep the turbo spinning and keep boost up during a let up on the accelerator pedal. Advanced ECU, and presumably AP custom tuning for race applications could probably do this.
I saw turbocharged Toyota Gran Prix prototype cars using this system on the street course in New Orleans Gran Prix many years ago, with fire belching from the exhaust headers when entering the corners with some degree of lift throttle ALS built into their engine tuning. Those cars were amazing.
The downside to ALS on a daily driver type car is that the extreme heat generated will destroy the exhaust system in only a few hundred miles when driven on the street in stop and go traffic or when cruising and off boost.
http://www.rallycars.com/Cars/bangbang.html
In racing applications the driver is in boost most of the time, probably 90-95% and in lift throttle mode only 5-10% of the time, so the exposure of the exhaust system to the secondary explosion effect of ALS is relatively infrequent. But in a stock situation the ratio is backward with the driver off of boost most of the time, letting up on the pedal very frequently, and on boost, especially full boost only a small fraction of the time. This is why ALS on a street driven car is a recipe for damage.
Given the small 5mm center shaft on the K04 turbo, it is extremely sensitive to exhaust temps exceeding 1500 degrees F. I think a "bang bang" tune would produce temps in the center housing of that turbo substantially higher and probably end up destroying a K04 turbo in short order.
But, OP, it's your car and your money, so bang bang away and pay as you go for heat damaged parts.
