Whats the best way of improving the acceleration in 5th gear, the engine is a 1.5 vtec D15Z8, in 3rd gear you can fly past 90mph but in 5th its really slow between 60 and 80 and has problems reaching top speed, speed drops on hills etc. Mods on the car are Ramair induction kit with home made CAI, Remus stainless steel exhaust system.

 

swap the gears after 2nd, swap in a 4.7+ FD.