I was always a proponent of very narrow track, both front and rear. My first lakester was such a car and was very long and very angular. By most accounts, that car should not have gone as fast as it did. Today, my better idea for the second car may or may not prove faster but one thing the wind tunnel did hint at was wider front track. As rear suspension is stock Reynard Formula Continental, track is wide at 55". Front track has been widened to 50" so I will have to wait until next year to see if these changes (and many others), improve speed.
Rex, I posted a short YouTube video of my car in the Darko wind tunnel and you can clearly see smoke trails of turbulent air coming off front wheels all the way back. So, all that nastiness from the front stays with you for the entire length of the car. Many years ago, I investigated barge boards in an attempt to deflect front wheel wakes so they do not affect aero the entire length of the body. I still think these have merit but now that I have changed front track, I have no idea where to place them.
John