ok i posted a couple of times and got some good advice so i hopr i can get some more before i lose my god damn mind. i got an 01 its got t5s, ported, k&n pro air kit,and advanced timing. ok so it had a set 300 mains and was really rich so i put a set of 280s in it and the bottom end was great but the top end was a little poppy.so i put the 300s back in and adjusted the needle and the top end got better but the bottom end sucked, it was real boggy. so my question is should i put 290s in it or put the 280s back? the reason im thinking of putting the 280s back is because my friend said that i should be running 112 with the timing advanced and it could of been detinating?