You have 5 trial hehe..j/k. Z32 is just a PITA to get a good launch. I got too many low 13s even flat 13s of my stage4. It seems that you have to get a good (really good) launch to string shot the Z off the line. You either bog or spin the shit out the tires. My best time is 12.8 but that's not easy to get. Now on highway it's totally different. Z just rules!!!!!