This is the power difference mesured with a g-tech on my nsrt4
"Main Run" = stock
"Comparison Run 1" = 93performance modified for wastegate actuator stage 2 (Thanks Brian!!)
This was tested on the same track (Autodromo Monterrey) but here time slips only are displayed on screen.
Times: stock 14.54 vs 93perf 14.27
Some knock was detected on third gear but on 4th gear was bigger, maybe because the boost spike, you can see the HP lost on the graph in the very begining of 4th gear.
93perf log:
http://dpcmx.net/fgv/20090107-2349v9r13wga2.log