I have two questions about the xcal2, my first one is about the 87 performance tune - Why do i not feel much difference than the stock tune? Is it possibly because I didn't purchase an intake with it? I have at 07 with a manual - I heard you don't feel the drive-by-wire difference so much in a stick. My second question is do you think i will feel a larger difference when i use the 93 performance tune?