post a video and i will help but you need to throw it when you are about half way round but as i said post a video or send me the link to one on youtube
Really there is no time though. Its the time your comfortable you know. Like some people throw them right away or at 180. Personaly i think at 180 is the most common and easiest.
Trucks look ugly if you wait until the very end to throw the bar. Remember that. Throw the bar at around 180, catch it, and you have good clean sick truck.
don't think about when to throw it, that got me hung up a lot on this trick, just throw it when most comfortable, and make sure to think about your 360 more then your barspin