Well, I didn't think you were being snotty ... just excited about your 240! Right? I will agree that new questions should be posted as a stand alone, but I really disagree with being rude to those who have a question and can't seem to get an answer. Were just all trying to get or give some info on these boards and I find it better just to help rather than scold. I would find it difficult to believe that we would be rude to each other if we were all sitting in a room together rather than hiding behind PCs. My opinions, take it or leave it.
Anyway, the "kit" in my picture is not an off-the-shelf kit. It is fully custom piping, exhaust manifold, right down to the injectors. The turbo itself is a Mitsubishi 25G (GReddy) and the intercooler is a spliced truck front mount with custom end tanks. A lot of work/research went into this system which was in a friend of mine's car, soon to be in mine (engine is out waiting for machining). The car dyno'd at 490whp, 475ft/lbs tq ... but I've got a few advantages over what he had that should push well over 500whp.
Have you tried to download the virtual engine program?? An S14 240SX weighing approximately 2820 lbs making approximately 240hp (Nsport Stage 1 estimates) will approximate 13.92 seconds @ 96.7mph in the 1/4 mile, not factoring the "variables" (... launch, shifts, weather, track conditions, etc. ...).
Is $4000 worth the money? The real questions are, "How fast do you want to go? How much can you afford?" ... You be the judge.
Hope this helps.