Lower control arm bump stops
With the 1.03" bars and the stock bump stops you should be pretty good at a 1/2" or so.
If you do find that you're contacting the stock bumps stops more than you'd like you can replace them with poly "button" style bump stops, like these
http://www.summitracing.com/parts/ens-9-9121g/overview/
Now, the factory bump stops are progressive, and that was a designed way to increase the effective wheel rate as the suspension traveled close to the frame. Ie, in stock form the car uses the bump stops as part of its suspension, not just to keep things from crashing into each other metal on metal.
BUT, upgrading the torsion bars increases the wheel rate, and since modern shocks etc are capable of dealing with the higher rates, you don't necessarily need the progressive aspect of the bump stops. The larger the torsion bars get, the less that's necessary. So, you can eliminate the stock bump stops and replace them with poly's, just keep in mind that you won't want to be hitting the poly bump stops nearly as frequently as you might have been hitting the factory bump stops because they will not progressively add wheel rate like the stockers, they're just there to keep things from going metal on metal.
With the 1.03" bars and the stock bump stops you should be pretty good at a 1/2" or so.
If you do find that you're contacting the stock bumps stops more than you'd like you can replace them with poly "button" style bump stops, like these
http://www.summitracing.com/parts/ens-9-9121g/overview/
Now, the factory bump stops are progressive, and that was a designed way to increase the effective wheel rate as the suspension traveled close to the frame. Ie, in stock form the car uses the bump stops as part of its suspension, not just to keep things from crashing into each other metal on metal.
BUT, upgrading the torsion bars increases the wheel rate, and since modern shocks etc are capable of dealing with the higher rates, you don't necessarily need the progressive aspect of the bump stops. The larger the torsion bars get, the less that's necessary. So, you can eliminate the stock bump stops and replace them with poly's, just keep in mind that you won't want to be hitting the poly bump stops nearly as frequently as you might have been hitting the factory bump stops because they will not progressively add wheel rate like the stockers, they're just there to keep things from going metal on metal.
