Did I read that right? 4 seconds in low then shift? My entire burnout, from the time I nail the throttle until I'm back at idle is just over 3 sec, high gear only. I'm pretty sure the problem is you're staying in low WAAAY too long. You really need to shift as soon as the tires spin or just burn out in high to get enough tire speed to make smoke, much less stay straight. Keep it short.....JMO