We Raced for six min in Mod at my community track in the the time which seriously should have been five min. So with only 1200 mah batteries in 4wd it was challenging not to dump. So I attempted all motors and gearing to become on speed & not dumping. https://fernandotzbcd.shoutmyblog.com/34146095/le-mans-24hr-photography-prints-things-to-know-before-you-buy