FINISHED -
The M50 Crackle Tune is now finished after 4 days of work. I've attached it to this reply.
Now, I drive a manual so the fuel cutoff usually stops it from crackling, however there's a sweet spot just off "off-throttle" that makes it sound like a machine gun. Just be careful if you use this tune. If you make it crackle too much and too often, it can burn your exhaust valves. I usually do it only when decelerating at lights and on the highway. Between each "crackle session," give your exhaust valves and manifolds time to cool off. This tune gives it more fuel during off-throttle conditions, as well as retards the timing a considerable amount.
YOU MUST RUN 93 OCTANE WITH THIS TUNE.
Thank you for reading, and have a great day!
Yours in BMW,
Johnny Redline