Our cars have pretty small turbos, hence our nice wide torque band that starts at a low, "street-friendly" RPM. Actually, we can generate boost so shortly after idle it's ridiculous! The problem is, if you try to bypass the factory boost control (like you HAVE to do with an AGP WGA) and start asking the turbo to make whatever boost you want, it will be able to make lots of boost during part-throttle operation, but the engine will not be able to use nearly the amount of air that the turbo is trying to cram into it. What happens? Two things.......First, the engine can't supply enough fuel for the air being forced in, so you go lean. Trip the knock sensor, have timing cut. Hopefully. Worst case you go "BOOM". You'll also notice a fluttering sound. Cool, kinda like 2F2F, right? Wrong, that "fluttering" noise that people talk about is actually the mass of air slamming into your closed throttle plate when you let off and then rebounding and slamming the compressor wheel back into the housing, causing the turbo to stall. Naturally, this places very large stresses on the bearings and wheels until the air is exhausted by the recirculating or blow off valve. Like I said, the cure is, maintain PCM control of boost with a Stage 2 WGA, or go big turbo. Or, do what a lot of people do, go with an AGP WGA, make max power on the stock turbo, but re learn how to drive, knowing you control the fate of your motor with your right foot. Don't sneeze while granny accelerating, though!! [}
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