When I was driving my hack (HD Sportster with a Velorex rig) I use to set it up with about a 1/2 inch of toe in, a few degrees of Vertical Lean away from the rig, and set the center of the axel of the sidecar between 25 and 30% forward of the wheelbase of the bike itself (the further forward the better it cornered, but the harder it was to steer)
What numbers should someone be using for straight line top speed racing?