My guess is that the Spoon chip really isn't tuned to work well with the performance stuff that you have, and it's running rich or something. When the cams switch, it probably works a little better when the engine needs more fuel anyway.. I'm guessing that it all boils down to the fact that that program isn't set up to work with your car, and it was probably meant to work with different cams and fueling requirements than you have...... Just my $0.02