Slotted vs. Standard for road use

[Shifty]

Putting a set of new discs on the beast. Just an about town car with a standard engine, wondering if I should bother spending the extra on slotted rotors.

We all know that slotted designs provide improved gas and dust clearance, but I'm interested in the benefits weighed up. Given that there is less 'meat' I'd think that there's an increased risk of warping, they might get hotter quicker an increased rate of wear, and with the scraping effect I'd be very surprised if there wasn't an increase in pad wear also. By contrast the improved gas and dust clearance is a positive, and possibly the abiity to disperse heat more quickly.

So, for an extra 30% cost ($100 vs $130) per rotor is there any real value in getting the slotted items for a road car, or is it just wank value?

[wilbo666]

Putting a set of new discs on the beast. Just an about town car with a standard engine, wondering if I should bother spending the extra on slotted rotors.

We all know that slotted designs provide improved gas and dust clearance, but I'm interested in the benefits weighed up. Given that there is less 'meat' I'd think that there's an increased risk of warping, they might get hotter quicker an increased rate of wear, and with the scraping effect I'd be very surprised if there wasn't an increase in pad wear also. By contrast the improved gas and dust clearance is a positive, and possibly the abiity to disperse heat more quickly.

So, for an extra 30% cost ($100 vs $130) per rotor is there any real value in getting the slotted items for a road car, or is it just wank value?

I thought that the slots were also good at avoiding pad glaze.

Cheers
Wilbo

[slide86]

for your standard round town car i wouldnt really worry bout it. The only reason to fit em to a stocker would be for some bling bling factor.....
If the car was to receive some thrashing and hard braking then maybe. But still, you would be ok with standard discs....
What car is it for?

[gearb0x]

on a standard car, anything thats round is good.

do you REALLY think you will notice ANY difference other than "modders denial"

[GTI16V]

Am putting a second set of slotted on my AE93 Gti,the braking performance increased and as wilbo said it reduces pad glazing.by the way where are you buying your rotors from,they sound expensive.

[feral4mr2]

what about the added safety of a quicker grab of the pads on the rotor being slotted when you need them. there be some idiots on the road, i would rather stop a bit quicker for an extra 30 quid.
slotted rotors IMO are deffinatly not wank factor on a normal road/street driven car. cross drilled however are wank factor no matter what they are on.
worried about warpage? make sure all the wheel nuts are torqued to spec. where is the 'less meat'? and if you useing DBA rotors they have thier 'kangaroo paw' design which aids cooling of the rotor over any standard one.

[4agte]

aparantly it slotted rotors will chew the pad up measurably quicker than a normal disc so thats something to consider aswell but im going to put slotted onto mine

[Nark]

For an extra $30, why the hell not?!

[RWDboy]

They will probably chew up standard replacement pads quicker, sometimes it's advisable to look for a more up-market pad - which is where it gets a little more expensive than just an extra $30 per corner.

[SilverGhost]

Im considering getting slotted rotors for the 185 aswell. Had a look at DBA they seem to be a name that pops up all over the place, has anyone had experience with their products, good or bad? Would anyone recommend another brand of slotted?

I was also looking at their 2 piece rotors, and unless you are building a pure race car I would say they are definitely just for wank factor.

I just believe that because slotted rotors are popping up on more and more production cars manufacturers are recognising the benefits of having them over standard discs.

[SilverGhost]

I was looking at the ones on the right....doubt i really need the drilled and slotted.



They also have 'wiper' slotted rotors with opposing lines...any difference between the 2?

[mullett]

For the extra $60 that it's going to cost you, if it truely is a street-only car, I wouldn't worry. Spend the extra $60 on some nice pads, because that will make a difference for sure...

RM.

[RWDboy]

Have had some experience with DBA, their solid rotor actually warped quite quickly on the Ford Falcon (daily that i borrow sometimes), although i can't remember which pad we were using, it was a standard sort of Bendix pad so i have no idea how it managed to warp so quickly.

The slotted rotor has been on the WRX for ages now (a few years, 20Kkms at least) and are just as good as the day we bought them, however we switched from standard pads to MRT road performance pads to suit, and yeah - haven't ever had a problem.

Also used solid rotors on another Subaru - but haven't had them on long enough to really make a judgement on 'em.

The difference between the standard rotors and the aftermarket slotted rotors was quite huge. For starters the slotted rotors dissipate heat alot better, you can stop from 200 - 0 half a dozen times before you start to lose performance (this is with the MRT pads of course), although the heat dissipation difference between slotted and solid would be minimal. They bite very nicely and consistently - obviously they don't get cushions of air or other fluids/particles.

It is a bit of wank though - unless you want to do some light track work i wouldn't really go with the extra expense of slotted rotors etc

[wiso]

any rotor on a ford falcon seems to warp very quickely, the braking they use is actually not designed up to spec, they should really be bigger with way more cooling, but because they are trying to keep budget, they are a compromise

my parents went through 2 sets of rotors in under 60,000km, and working at a service station with workshop alot of falcons come in with warped rotors soooo often

[RWDboy]

Yeah they are quite small brakes for a 1600kg car