Original post for this was on MFG Here: Turbo .AIR maker

This tool helps you convert a .AIR file with normal timings to Turbo timings given a frameskip value. Remember: you must grab the timings in true normal (in VSav, you have to set this through the game config menu, since the default "normal" is actually Turbo 1. I believe this is also the case for SFA3).

In general you'll most likely use 3 (1 in 3 frames) or 4 (1 in 4 frames)

In case you're wondering about the values CvS2 and CFJ use (highlighted numbers are the ones you'll want to use for the SKIP_FRAME value:

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  1 star - No frameskip[/li]
  
• 
  2 star - 1 in 5 frames[/li]
  
• 
  3 star - 1 in 4 frames[/li]
  
• 
  4 star - 1 in 3 frames[/li]
  
• 
  5 star - 1 in 2 frames[/li]
  

These will vary from game to game, so it is your responsibility to know which value to use. Do not use any value lower than 2. Requires Python 3.

Download Link:
https://github.com/Jesuszilla/ConvertTurbo