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This Has Probably Been Asked 500 Times By Now

IM-32-FK
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IM-32-FK Mentor

IM-32-FK

Posted
Posted

But honestly, for street use, what is the best kind of rotor? standard, slotted, drilled or slotted and drilled? Came across some slotted and drilled brakes for a decent price and im not sure if they are good enough. I heard they tend to wear out much quicker but are better than the others in terms of performance. Im only going to use it on the street but i dont want to replace discs and pads for another good few years , will i be alright with drilled and slotted brakes?

gtr jet Veteran

gtr jet

Posted
Posted

Steer clear of drilled and slotted and stick to factory for the street. Or just slotted rotors.

Drilled rotors tend to crack, however if it's just on the street you may never get them hot enough to see that happen.

IM-32-FK Mentor

IM-32-FK

Posted
  • Author
Posted (edited)

Steer clear of drilled and slotted and stick to factory for the street. Or just slotted rotors.

Drilled rotors tend to crack, however if it's just on the street you may never get them hot enough to see that happen.

can you really generalise drilled and slotted discs like that? maybe if you abuse them for a long time they would crack but if you brake hard here and there then it shouldn't be a problem? i mean if i take my car to royal national park and gun it up there, will they crack? im just after street use and occasional hooning

Edited by IM-32-FK
gtr jet Veteran

gtr jet

Posted
Posted

Too be honest I've never used drilled rotors before and I've only ever seen them crack on track cars.

If you can get them at a decent price then you should be fine. I'd just keep an eye on them after some hard driving.

djr81 Grand Master

djr81

Posted
Posted

The reality is for street use it doesn't matter. Use whatever you like. You shouldn't be using them hard enough to cause cracking issues. A common or garden variety plain disc is cheap and looks after the pads so would be best unless you want purtiness.

For track use it does matter and slotted rotors (done correctly) are what you want. Drilled are to be avoided. Solid rotors aren't as good as slotted. Slotted you need to ensure they are done right (so no slots to the edge of the rotor, proper radiused finishes etc). Then you get into hats, cooling vanes, material etc etc.

djr81 Grand Master

djr81

Posted
Posted

nah, plain discs arnt cheap. they still cost around $250 brand new, slotted and drilled only cost $100 extra. so you might as well get slotted/drilled discs...

Slotted

More so do research on pads, brake lines, brake fluids, disc sizes, brake stopper

Genius. He said for road use. Last time I checked there wasn't a great need for degassing pads when you drive down to the shops. So yeah go pay more money for stuff you don't need that will wear the brake pads out that bit faster.

If you are getting them for cheap then just get them for cheap and don't worry too much about it.

The major cause of them needing replacement is failure ie cracks, warping etc. Which is usually because people use on tracks something that isn't meant to be used on tracks. Says so on the box. Not for motorsport use.

For some reason people are willing to pay more money to use them on the road where the extra stuff has no benefit. Genius.

  • Like 1
Sinista32 Grand Master

Sinista32

Posted
Posted

I take your point on over engineering :/

Although for me I'd still go slotted, better pads, fluid and braided lines.

If I'm spending on new I generally upgrade for the little extra at the same time.

Especially if I have upgraded the performance of the vehicle.

warps Mentor

warps

Posted
Posted (edited)

To take it one step further, slotted rotors don't even offer an advantage on the track. It's one of the biggest automotive scams out there. This is straight from the mouth of an engineer who works for a large brake manufacturer, reporting on the testing they did when their company wanted to release a "performance slotted street range" of rotors. They performed worse than their run of the mill stuff on the dyno, but guess what? They still whacked a 30% premium on them and put them on the shelves. And you guessed it, muppets happily pay that premium because racecar.

By all means, better pads and decent fluids will help you, as will quality rotors. Just don't waste your money on slotted, thinking that they offer any kind of performance upgrade whatsoever.

Edited by warps

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