Originally Posted by decibels

i can't give an exact but i find that stiffening the car will be the way to go for foam which means moving the shocks on the bottom to the outside, raising the roll centres, shortening the camber links, stiffening the sway bars, and going heavier in shock oil. with foam you have to think in terms of grip. the foam tyre has plenty of grip so if your rear end is loose you may want to lengthen your rear link or something that will give the rear end grip!! Also stiffer top and middle decks will work better to!! but try these one by one and learn what the car does as you go!! it will make you faster in the long run!! hope all this helps.