Slotted over standard rotors?

[madboy]

Is it really worth the extra $? do they give a noticeable improvement over standard disks?

My roadster is my daily, gets the occasional thrash through the hills and will probably never see track time.

All 4 rotors with pads are due for replacement I think early next year.

Cheers
MB

[broady]

My standard rotors and OEM pads stood up just fine on the track day last Sunday, so I'd say they'd be just fine.

[bruce]

I think they will just wear your pads quicker for the street. I would think there is only a small advantage with them at the track (more pads-wise).

[two40]

But they look cooler.

I'll be quiet now...

[hks_kansei]

have you ever had brake fade when in the hills?

if not, then you dont need to bother.

if yes, look into high temp pads first rather than discs.

[madboy]

have you ever had brake fade when in the hills?

if not, then you dont need to bother.

if yes, look into high temp pads first rather than discs.

no i haven't, even with "spirited runs" up and down Springbrook and Tomewin.

I don't know what pads are in it now(wish i did) but the seem to be good under heavy braking or when you stand on them in a hurry. I have nothing to compare them to tho as these pads/rotors where in it when i got the car.

cheers
MB

[hks_kansei]

if you haven't had brake fade then there's probably no reason to go for slotted or anything.

in saying that though, if the price difference isn't much it may be worth doing anyway.

[NMX516]

The first time I installed slotted rotors on the NB was just before a track day and I noticed a definate improvement.

I use DBA 4000 series and I also think they're better quality than Mazda disks, so cop hard use better and seem less likely to warp or even become grooved. Pads seem to have a harder time with slotted rotors, but really, having to maybe replace pads once a year on a road car if you brake hard or see the occasional track day, isn't too big a deal. No harm in slotted rotors on front only too btw, especially if needing to save a bit of money on the whole exercise.

[Charlie Brown]

I’ve just fitted slotted rotors on the front as the original rotors were “slightly” worn after 4 years of road and track work. There isn’t that much difference in the price between the stock rotor and the slotted one but if you’re on a budget then stay stock.

BTW, I just had a look at your rotor pictured in the Garage section and if nothing much has changed in 12 months, the one shown doesn’t look too bad. Sure it’s a little scaly where the pads don’t touch but there doesn’t appear to be much of a wear step closest to the centre. If the faces aren’t crazed or cracked, just get them machined. Far cheaper than replacing them.

[Steampunk]

The only real tangible difference is wet weather stopping.
I couldn't feel any difference in everyday driving when I fitted mine, and so was really looking forward to rain.
In the wet with normal rotors, there would be about a 1/4 second delay before you feel the pads bite, but with slots, the delay is noticeably shorter.

You've probably missed them, but WASP was selling RDA (for NA8) slotted cheap.

[wun911]

I hear you can get them slotted like 1mm deep cuts into rotor to save rotational mass...

[05ragtop]

We should really wait for Mr.Morlok to have his say, before we do anything.

[Stu]

We should really wait for Mr.Morlok to have his say, before we do anything.

Don't feed the trolls

[two40]

I'd get drilled and slotted if only just to reduce unsprung rotating mass.

Fair warning no expert here but how much do you really stand to gain by going drilled/slotted? I dare say it wouldn't be much and I understand every bit helps but still, not something a 'once in a blue moon' public road racer should concern themselves with.

[Guran]

Guys I think Wun was having a lend.

I've used slotted rotors on my Cooper S for track days (with Ultimates). They worked really well but chewed pads like nobodies business. After three or four hard track days, I was down to metal on metal!

My advice would be to skip them unless you notice brake fade in your driving habits. Even then you'll probably need to look at changing other things too (pads, fluid, lines). Ortherwise the normal rotors work fine. But if you like the slotted look then that's up to you.