It is true!! No top end power is to be gained when switching from a slipon system to a full system. Bike made within .75 HP of each other on the top end. Big gain in the midrange from 5500-11000 RPMs, with a little gain from 11000-12000
GUHL reflashed ECU with 14000 Rev limiter, PCV mapping, secondaries pulled out. Bike is stretched almost 8".
I the prior thread, Brock's was the most accurate in their dyno graphs comparing a stock, slipon and full exhaust.
Grave's showed power gains everywhere, so I don't know the exact data behind their dyno pulls..
line was last July 27, 2012, 90 degrees outside. Slipon system
line is yesterday May 30, 2013, 87 degrees outside. Full System
I put up a copy of the barometic data also from last year and yesterday. Almost identical so very little difference in air. Look at the DATES.. not the file names, we didn't change the file names before I took the pictures.
So.. there it is!!
And a youtube video....
2005 ZX-10R Akrapovic Ti Evo 2 w/CF LOR can, PC3 with custom map, Factory Pro velocity stacks
2009 ZX-10r Full Gen4 Brock's SS exhaust with CF 14" can, PC3, Secondary Butterflies Removed, Kawasaki Race Exhaust Cam, My Own TRE, Degreed Cams 109/108
2011 zx10r Lower'd 2" Frt & Rear, Stretched 8", Graves CF slipon, GUHL Flashed ECU