Then gears it is! Like others mentioned. Around 100 mph you should be able to get that time slip down to 13's even. Maybe lower. Some gears, chassis setup, etc. And you should whittle away at it. Have you dynoed the engine yet? It's useful for telling you where max power is made. Find that. Set your gears with your tires to trap just below that. And I bet you'll pickup some time! And never forget the more time at the track the better! They call it test and tune for a reason!