[miller]

I also believe toe has much to do with high speed stability. ALso with rear engined cars weight balance and front end lift seems to be a high speed killer. Move the battery and anything else in the car you can to the front and maybe looking into a front chin spoiler would be a good idea. also blocking off any air that can get into the front of your car will help. You want to create a low pressure area inside and under your car. Also making some way for air to escape out of your wheelwells would help too. I think a good start would be figuring out your cars weight balance. It says how to do that in How To Make Yor Car Handle. Oh and putting sheetmetal under your car to make it a perfectly flat surface would woek well too. It seems that this could easily be done by using 3M structural tape and tape the sheetmetal to the underside of your car.