QUOTE(catf1000s/p @ Mar 28 2008, 01:23 AM)

thats cool and it still works the other way also
That may be true but the reason they did this(they werent the first to do this either)or offer the service is for what I described above. That was their thought behind doing it. This is a part from the 2002 Snotech magazine article which talked about Advanced Racing Technologies crankshaft Turboing.
"Turbo Cranks are one of their latest ideas. They drill a series of holes at a compound angle around the outer diameter of the crankshaft. The larger the crank the larger the holes. The theory is the holes act like a fan, boosting the transfer of mixture up into the cylinders. According to Steve, this achieves a pumping action that creates more vacuum, pulling more mixture into the combustion chamber. Increases of up to 2000 RPM's have been reported from many of the thirty engines modified so far. All they know for sure is it makes a difference."