Drilled/slotted rotors on a street car good idea or bad?

[BIGSHCLUNK]

What calipers are you using?

SSBC 4 piston  Stops like a MOFO!

[brads70]

SSBC 4 piston  Stops like a MOFO!

Nice1 what Dia. rotors and what size bore in the master cyl?

[BIGSHCLUNK]

Nice1 what Dia. rotors and what size bore in the master cyl?

Rotors are 11 1/4 (sloted/upgrade) I run manual brakes, with minimal effort.  M CYL is also SSBC but not a billet one.   Cast Iron GM style, I dont remember bore size , sorry

[ajantics]

On the street you really will not notice any difference. My best buddies race honda challenge. 4 years ago one of them that had more $ than brains decided to test a bunch of different brake set ups on his NSX. long story short there was no stopping difference between the slotted vented rotor and the standard rotor from a basic 60mph to complete stop on the stock brake calipers. There was very little difference around the track. He used new pads for each run and new rotors. Once he switched calipers and rotors that was a different story!

From my personal experience drilled/slotted seems to create more brake dust. When I had my 350z I switched to drilled/slotted and I had to wash my wheels twice as often! 

That being said my 73 has flat rotors and my 70 will have drilled/slotted front and rear lol!   

[Aussie Challenger]

We cannot compare motor bike rotors to car rotors, cast for car & steel for the bikes.
Unfortunately some suppliers are just drilling cheap cast rotors and marketing as something special for more money. Slotted & drilled rotors look the part but on a street/cruiser are not needed unless the wow factor is what you want. Buy quality brake rotors, either types, what price can you put on safety and use quality pads. Best disc's rotors in the world and poor pads will be a problem.
Bike rotors cannot/shouldn't be machined (too thin), most car rotors can be machined or ground depending upon finished thickness.