Brake Rotor Questions

[sea]

Currently have Porsche OE rotors with Textar pads on rear.

Pads have 9 mm left. Rotors are about 19.5 mm but show sign of warping, brake vibration at faster speeds but not noticeable under 70 kph. Had same problem with front but much worse. Dealer only did front brake job, new rotors and pads, gave me old front pads back and said I could reuse them, did not do rear but noted they were a little warped too. This mostly fixed the braking issue and I had very little issue at the time with the rear. Note, I think the tire guys over torqued my wheels.

Decided to change rear rotors myself, now that I have started hearing a rotor high spot rubbing the pads and their pulsation has become obvious..

My three questions:

what brand rotors do people recommend for a car that is mostly city driving, no track? I want to balance my urge to save money over the OE brand with retaining a reasonable level of performance. Has anyone had experience using the ATE ones?

is it acceptable to reuse my pads on the new rotors?

should I buy a dial gauge and measure lateral run-out when replacing the rotors?

[tonythetarga]

Porsche rotors don't warp easily. The problem is more likely with pad transfer to the rotor. Some pads will do that when they get hot and the way to get that pad material off is to use a pad with a more aggressive compound.
To answer your questions, ATE makes very good rotors as do Sebro. I use Sebro on my Cayman and run it at the track aggressively. I've never had a rotor warp. They'll crack between holes in the drilled rotor when they're repeatedly heated as happens on track.
I would not use the pads you've used if they're transferring material to the rotor. Don't buy the same brand.
On the wheel torque. Get yourself a good torque wrench. Loosen all the wheel lugs with a breaker bar and then retorque at 95 ftlbs. Use a star pattern for tightening so you get equal, balanced fitment of the wheel to the hub.

[Jeff Alton]

I would recommend you do not use existing pads with new rotors. The pads have worn to the old rotors and will not provide proper performance. I can't see how over torquing the wheel would cause the issue you have. It should be checked if you suspect they were over torqued, but it likely will not solve your issue. Buy a new set of rear pads to go with your new rotors.

[stealthn]

Factory pads are fine for the road too, oem