at least wit the extra weight the car is more stable at higher speeds

 

thats not what makes it stable at high speeds. its the alignment of the car. more toe-in and the front is stabilized more meaning at higher speeds your very stable, the downside of this is it causes understeer. toe-out stabilizes the rear. this gives a great increse in cornering and oversteer, but makes the car very unstable at higher speeds. (This is why a giant rear sway bar cranked down tight gives you more oversteer, and a giant front sway bar gives you more understeer.)