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drilled/slotted brake rotors opinions

after replacing the stocks on my '04 F250 diesel too many times, I did. easy job and no problems since. and don't ask what brand cause that was 4 or so
years ago.
 
I installed a set of drilled rotors on my toy car years ago. They developed cracks around the holes. I did not realize that was happening until I ended up with a broken rotor. The rotor broke while braking hard from ~80 to ~30 for a sharp turn. Shorts were stained.

When I called the manufacturer about it, their response was "Our drilled rotors are for appearance only, and are not intended for high performance use". This answer, despite the word "Motorsports" being part of the company name, seemed a bit confusing.

If I ever tried drilled rotors again, I'd make sure the manufacturer was going to stand behind them before buying and I'd be checking regularly for cracks.
 
Drilled helps in wet conditions as it give the water a place to go; but they are prone to cracks next to the hole.
Slotted helps with heavy braking because it shaves the pad to new material as it spins but pads wear faster.
Drilled and slotted gives the best and worst of both.

Normal flat rotors are good enough for most people as they last longer.
That is unless you haul heavy loads and try to go from 80 to 30 in a curve.
 
I did a coupla years ago on my '99 Saturn SL1. Like any good mechanic, I never glanced at the instructions, which included a very specific procedure for breaking in the new pads and rotors, they quickly started vibrating upon braking. I revisited the website and learned about the break in procedure, so they always vibrated until about a month ago. I replaced them with stock solid rotors when I had a caliper piston seize up. (replaced under warranty). Now, no vibrating upon braking.
 
Slotted, and or drilled rotors are for racing, or cars that don't get driven very much. Now you can get carbon fiber brake rotors like the ones my friend uses on his racecar, the rotors can glow cherry red, and they will still stop a car from 340 MPH without a parachute if you have the room to stop. But for $3000 for a pair of CF rotors with the proper pads, not very practical for a daily driver, or farm use.
 
I tried them on my Ram 2500 PU but cant say they were any better at all and didn't last as long as regular ones. Didn't get them again.
 
(quoted from post at 15:55:15 07/21/18) Slotted, and or drilled rotors are for racing, or cars that don't get driven very much. Now you can get carbon fiber brake rotors like the ones my friend uses on his racecar, the rotors can glow cherry red, and [b:d4878a61db]they will still stop a car from 340 MPH without a parachute if you have the room to stop.[/b:d4878a61db] But for $3000 for a pair of CF rotors with the proper pads, not very practical for a daily driver, or farm use.
Click to expand...

LOL, if you have the room to stop, solid rotors with no brake pad material on the pads and dragging a boat anchor on a chain will also stop........
 
(quoted from post at 13:58:26 07/21/18) [
LOL, if you have the room to stop, solid rotors with no brake pad material on the pads and dragging a boat anchor on a chain will also stop........
Click to expand...




But we are not talking about using boat anchor's on a chain to stop a vehicle on a raod are we.
 
I just put them on my Dodge 2500 because it was shaking when I hit the brakes. Still shakes the same. I got these on ebay for a pretty good price and shipped with pads very fast. They seem to be holding up fine so far.
a274247.jpg
 
I had them on my 98 Chevy, slotted and drilled. Close to 800000 on them when I traded the truck. I did notice slightly shorter stopping distance when I had to hit them hard, but normal driving no difference.


Wife 06 Buick Lacrosse is her work car. HAs close to 300000 on it now. I put drilled and slotted rotors all the way around and ceramic pads on it the last time it needed brakes. That was with around 230000 on it and they still look great. Use to only get 35 - 40000 out of them before.
 
I put them on my wife's can because I got tired of her warping rotors every 30K, going on that now and now issues.
 
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