sounds like me - last year. I went 13.6 with a trap of 107 to 109 last year on factory stock Bridgestones. This year with the Z10, drag radials, and 440cc injectors, I hit 12.7 with a bunch of 12.8s. I think I was running out of fuel last year with stock injectors and 1:12 FMU, I could "feel" the pull with more fuel, also I ran before with full exhaust (3" turbo to tip), this year I ran with open downpipe (which increased boost quite a bit from 8.5 psi peak to 9.8 psi peak, without touching anything else)