I have to agree with phaeton.
spend the effort on the tires. You can't break the rules of physics, and physics clearly states that when cornering, WEIGHT DOES NOT MATTER.
the equation of centripetal force is:
=(mv^2)/r
friction(which acts as centripetal force: =umgsin90 *u= coefficient of friction
therefore:
(mv^2)/r=umgsin90
v^2/r=ug
since mass is not an issue, and you can't control gravity or friction, you must slow down. simple. by the way, the "u" would represent the road conditions, the less friction the smaller the value of "u".