if you mean when do I get on the throttle after staging the car and engaging the trans brake button I wait until the first light on my side comes on and then go to WOT, this a S/P car with a Mega 400 box for the trans brake delay releasing the trans. brake after me releasing the button and the W.O.T switch gets activated
As far as applying the trans brake button I creep into the stage light very slowly(under 2000 RPM) and as soon as I see it light up I press the trans brake button, get my foot off of the brake peddle and wait until the top light comes on and then go to WOT and hold on