I'm doing a bit of research into the effects of short field performance packages but am struggling to find data on how much such systems affect the TO/L distances of aircraft.

The most notable example is the Boeing 737 which had the SFP enhancement but I can't find any revised landing distances for it, only what they changed - http://www.scribd.com/doc/60620254/Short-Field-Performance-SFP-737-8

There was also the case where Embraer were going to add spoilers to the Phenom 100 (http://www.flightglobal.com/news/articles/meba-embraer-prepares-to-add-spoilers-to-phenom-100-350618/) but again there are no recent updates on this or revised sepcifications.

Any help with these, or general information on the performance characteristics of SFP devices would be much appreciated!