I'm preparing to change my rotors tonight. Yesterday I drilled off the head of the retainer screws (for lack of a better term). Now I'm curious if the rotor itself is threaded for the screws or if I'll now be able to just pull the rotor off the remaining posts. Or am I going to have to somehow either remove the posts or completely drill them out before the rotor will pop off? I haven't been able to find an answer to this specific question with the search engine.

 

The rotors just "sit" on the wheel hub.
You won't be able to just pull it out because you'll find out its all rusted and stuck together.
I use a block of wood and a mini-sledge and hammer around the rotor to break it free.
Spray some penetrating fluid to help loosen it from the hub.

 

I believe it is just a hole not threaded as then the rotors would be too special for after market.

 

Should just be a hole.

Don't know if the 8's rotors are like this, but it's common for rotors to have four holes. Two are plain, and two are threaded. The screws go through the plain ones into threaded holes in the hub to hold the rotor in place when the wheel is off. The threaded ones are kind of a built-in puller. You take the screws out, then put them in the threaded holes, where they bear agains the hub. Tighten and they push a stuck rotor off.

The flaw with that scheme is that the screws usually rust in place and need to be drilled out, so you don't have them for puller duty.

Ken

 

The holes are not threaded and there is a threaded hole to use like a puller as ken-x8 mentioned above.
Best way to get the screws out is either an impact driver or heat it up with a torch and simply unscrew it.
I've used both methods and using a torch to heat the screw was much easier.