Is it simply a function of torque numbers where a rear end will break?

Or could it be load?

I mean, would a lightweight car be less likely to break the stock rear than a factory stock weighted car with the some amount of torque (assuming they both had the same traction)?

 

I am sure there is a physics equation somewhere for this

 

When you launch a car, there's a weight shift that takes place. The heavier the car, the greater the amount of weight over the rear axle and the greater the load on the rearend.

All related... just like everyone in an Alabama trailerpark.

-Mindgame

 

I agree with Mindgame. The lighter the car the less amount of force is applied to the rear end (Newtons third law, the car doesn't push back as hard).

 

so getting my car down to the 3100/3200 pound range should help me last a little longer while going fast then, right?