@ali3611
bro 4-5 sec is a very precious time you are wasting on burn/spin . Its a game of practice launching at a RPM where you have minimum wheel spin .
You can try using handbrake has you have already realesed 50% of the clutch ..RPM around 3000-4000... release the hand brake first then the clutch keep the rpm stable ... practice the launch ...........
plus check in 1st gear where u get the best torqe ..or pulling power ... you can check it by keeping the can moving slightly in 1st gear with full clutch release and press gas padle and go up to max redline cutoff ... then comeback again and drag again you will see where exactly in the RPM range you get the best pull ...... for example its frm 4000-7000 then keep yr launch 3500 rpm with handbrake and half release clutch and off you go ..