See, this is why I posted what I did.
I've NO doubt it's a good idea to open up the intake on the atmos side of the turbo, don't think I was saying you'd done the wrong thing, Karl. It's just that you know what you're doing, you must've spent hours logging and tweaking, keeping an eye on fuelling and boost etc. I know yours is a bit of aspecial case with the code/turbo setup you've got. You understand what you're doing.
I doubt it would be particularly worthwhile on a stock K04, either (not relevant to above posts, but someone will be thinking it).
Edit: @JB, maf flow is logged in grammes per second, which is mass flow rate. The way the sensor works it effectively measures speed, so if you increase the size of the maf tube for the same flow rate, the metered value desceases because the same amount of air flowing through the tube would be slower in a larger tube. It's related to the ECU code being calibrated to a specific maf diameter (called maf scaling), so when X amount of air flows in, the maf outputs a certain voltage. If you increase the diameter, more air can flow in for the same output voltage, so the maf under reads and the car will run lean. The ECU will compensate based on the lambda readings, but whether it can compensate enough is what you need to keep an eye on...
