If Red's going 127 mph with a 1 screen stocker that's yikes fast.
Steve Yanklin can make a No screen, No venturi MAF work with Max Effort chip. With a 4" to 3" bellmouth in front of this setup, it flowed more than a screenless LS1 3.5" MAF (well over 1000 CFM).
I'm guessing this is how nines are possible.