Do you know what your total timing is now under boost?
The way the stock computer works is that if you leave the spout out , it can't control the timing anymore, if your car is still set up that way, I'd pull the spout out and set the timing at 18-19*, leave the spout out and go drive the car and see what it does. It will be piggy down low but should be fine under boost.
john
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handle every stressful situation like a dog: if you can't eat it or play with it, just pee on it and walk away.