"the stage 2 kit for the srt4 uses the stock turbo, but will take it to its absolute limit. the kit will use even bigger injectors (%30 bigger than the stock 03's and %20 bigger than the stock 04's) and 3-bar MSP and TIP sensors that allow the new ecu to push as high as 20psi. Now here are the really cool parts, in increasing the order of collness: First the boost dial, a five-position dial that lets you run full boost all the time, different boost for different gears, or all the way down to 6psi for low-grip conditions. Next to that is the intercooler spray switch. the sprayer uses a high-pressure pump (45psi) and Aquamist nozzles to spray a fine fog of cooling water of the intercooler. The sprayer can be controlled by the ecu based on speed, throttle position, ambient temperature and intercooler temperature, and the spray pattern and spray schedule was actually perfected in the wind tunnel to get the most cooling from the least water. coolest of all: a race gas switch. push the button and the ecu swithces to maps tuned for 100-octane unleaded. and if you're a dumbass and you run the 100-octane map on street gas? THe knock sensor sees it, turns on a little, red dumbass light, and switches back to the street map.
Then there's the big one: stage3. the big important part of stage 3, of course, is the turbo. since the turbo, wastegate, exhaust manifold and downpipe are all one casting, stage 3 gets to upgrade all of them. the turbo itself is a mitsubishi 15g-k2, the same turbo that came stock in the lancer evo VI, but without the evo's divided exhaust housing. the evo VI, for the record, had the biggest turbo of any stock EVO. the turbo still uses conventional sleeve bearings, but has an exotic, lightweight titanium aluminide turbine wheel for quicker spool up. the downpipe casting is much larger, and the area around the wastegate has been opened up for less disruptive merging of the two exhaust flows. so, still embarrassed to be seen driving a neon? "
