hey guy I need some help on where to start the time at I have a 4mm stroker with stock cylinders with a drag port & there 68mm and 36mm carbs 21cc domes step cut 100th wicked atv cut them he said it should be around 180 psi cylinder pressure and it will be run on 112 race gas I was thinking about 5-6 adv, any body have any thoughts on where I need to set the time at thanks for the help matt