So a couple of days ago , i did an airbox mod on my ss s/c..easy job i might add.....i drove my car and did a couple of pulls even ended up racing an audi a4 and beat it.....but today while driving , i downshifted into third since i was in fourth and i was only doing 35 mph, then i smash on the gas and the rpmwent crazy on me.....at first when u downshift the rpm goes up , so they did but when i pressed on the gas and was boosting around 7 psi the rpms dropped first and then went up ....so im wondering wat could that be??