[Topless in Cali]

marks-gt,
use a needle valve if you're going to do it, otherwise you'll be popping the check light (overboost code) all the time All this talk of blowing your motor, won't happen, the stock PCM is so sensitive it will cut your fuel and timing before you do any damage I've played with my 05' (no S1 yet) a lot (to the point the PCM stalled me out) and found a bleed off increasing boost just a slight bit, 1 or 2 psi, is fine and the PCM can deal with it, but your front tires won't last long yes, an electronic boost controller, stage 1, and upgraded WGA do make for a much, much, much better setup, but untill you want to spend the $$, just watch for the check light and keep your ears open for the PCM cutting back timing, you'll hear and feel it when it happens and then you know you're overdoing it. boost on...