1974 Duster drilled and slotted rotor question

[Steve Agrella]

Do drilled and slotted rotors make a difference in stopping power for street use, are they worth investment.
They look really cool, if they offer a benefit then it would be worth the investment for me but it’s not all about the look.

 

[Mattax]

All the companies that sell them say yes.

If you go back in history to look at the origins in racing, you'll find these were done to deal with specific situations. It was a tradeoff and the rotors were frequently replaced because any discontinuity creates a stress area.

 

[72bluNblu]

It’s unlikely that they’d get hot enough during regular street use to be a big improvement. Drilled rotors can be more prone to cracking at the holes, but that does depend on how the rotors are manufactured.

So yeah, you’re not likely to notice a difference either way.

 

[roccodart440]

Mine were a huge step up from the factory drums so I can't say but the look is worth the money IMO.

 

[oi81b4uu812b4]

If you drive like a little old lady you probably will not notice. If you drive harder on the street you will notice a slight improvement. And your brake pads might wear out quicker.

I would say out of probably a hundred drilled rotors I've had on cars over the years, I've only had one crack. It was a new rotor, new pads and I ran it hard on a road course, parked, jumped out and heard a distinct meta "ping" noise. I checked the rotor with a quick visual and didn't see a crack. No more than I drove it again you could feel it. It broke behind the pads. So it's not really common to have them crack.

If you drive like a little old lady, drum brakes will work fine. If you drive like a little old lady and have 6 piston calipers you just want people to look at your car.

 

[Steve Agrella]

I live in stop and go traffic, thought maybe they would make an improvement on the stock units