[Kracka]

1. With your TB and MAS mods I wouldn't be surprised if a 1,100 RPM idle was the best you got out of it.
2. The car sounds to be running extremely rich and you may have a plugged PCV valve.
3. As previously discussed.
4. Sounds normal; most likely the exhaust contracting after getting heated and expanding.
5. Thank you for taking the time to properly form your post. As you can see, when you make things easy to read many people are willing to help out.