As stated in HPI No90 10 ways to an 11 second 1/4 time R33 GTST.
Stock coil overs, stock turbo, stock injectors, rising rate fuel pressure reg, a well tuned aftermarket EMS, fmic, 3-4" free flowing exhaust split dump, 1 bar boost, 15" Drag radial tyres inflated to 20 psi, strong single plate clutch, 1/4 tank of fuel.
Also remove any excess weight from your car like spare tyre, passenger seats, etc.
Sounds like a good recipe for 220 rwkw.
To get into the 11 second mark with these mods would also need some drag racing experience i would think. As also stated in the mag.