We first used a fireworks sparkler on the model at night. Not bright enough on any camera setting. So we used several sparklers. So we tried a very bright light bulb powered by the car's drive battery. We were so proud, thinking the whole plan was coming together already.
Fools rush in.
Lo and behold, it was doing the exact same thing the computer simulation showed. Not to worry. We'd just tweak it a little. We tried having less and less steering wheel throw as the car moved farther away from the camera. We tried more angle as it moved away.