14.6 is not bad at all for just an intake

Playing with the tire pressure can help, extra weight loss would definitely help. A 3.6 pulley and race gas is possible, but I can see you like to race in street form, same as me.

When racing on street tires, drive around the water box and just give a quick burnout to clean off the tires. Then either launch by holding the brake and gas or what some like to do is just launch it at idle.