[ADHD]

I say DRILLED are FAR SUPERIOR to SLOTTED IN PERFORMANCE!!
1. Drilled will stay cooler yet they dont last as long cuase they crack yet the perfomace is better cause they stay cooler
2. Drilled are used in F1, NASCAR ETC... So why are all u saying SLotted are better???

I want Info from PERSONAL EXPERIENCES Not A manufacturs suggestions!!

[jetblk328i]

drilled looks really cool and they are on my bike so id haveta go with drilled.... they work really good in the rain /wet stuff, and i think that it might decrease some brake dust too since some of it will be in the drilled holes lol....go with drilled.....

[DTMhunter]

Exactly, they look better

[darkcloud]

Drilled all the way as far as performance aspects. Although length and durability can be questionable, but money being no object drilled is the way to go.

[DTMhunter]

"Each and every Dinan/Brembo brake conversion is now available with not only a choice of black or red calipers, but now you can choose either SLOTTED or DRILLED rotors! Dinan's preference remains going with the slotted option, but now YOU have the choice."

[darkcloud]

Originally Posted by DTMhunter

Exactly, they look better

Not just cuz they look better fool. They perform better as well. There is more surface area for heat and debris to escape then a slotted rotor.

Want both. Get drilled AND slotted rotors. Durability is very compromised but you'll stop on a dime.

[DTMhunter]

what?

The drilled rotor has less surface area!

[ScheerSpeed]

Drilled Biatch!!

Drilled rotors are much better performance wise, but have a shorter life due to the tendency to crack.

slotted rotors arent as good at performance, but wont crack nearly as much as a drilled rotor would.

For the everyday driver, who cant afford to replace drillled brake rotors once they crack (although they are still just fine cracked), then i would say stick with the slotted, because you wouldn't need the extra performance from the drilled

but for someone who tracks their car i would hightly reccomend a drilled rotor.

My vote goes to drilled cause they look sportier and perform better.

F1, NASCAR, CHAMP Car, IRL, and most other race cars use drilled rotors....and they must have a reason...

DRILLED FTW!!!!! :

[Hunter399]

Here's a post that I did that summarized thoughts about slotted vs. drilled vs. normal.
--------------
Darrick Dong; Director of Motorsports at Performance Friction: "Anyone that
tells you that drilling makes the disc run cooler is smoking crack."

Power Slot: "At one time the conventional wisdom in racing circles was to cross-drill brake rotors to aid cooling and eliminate the gas emitted by brake pads. However, today's elite teams in open wheel, Indy and Trans Am racing are moving away from crack prone, cross-drilled brake rotors in favor of rotors modified with a fatigue resistant slotting process."

Stop Tech: "StopTech provides rotors slotted, drilled or plain. For most performance applications slotted is the preferred choice. Slotting helps wipe away debris from between the pad and rotor as well as increasing the "bite" characteristics of the pad. A drilled rotor provides the same type of benefit, but is more susceptible to cracking under severe usage. Many customers prefer the look of a drilled rotor and for street and occasional light duty track use they will work fine. For more severe applications, we recommend slotted rotors." (Note that even though Stop Tech sells both drilled and slotted rotors they do not recommend drilled rotors for severe applications.)

Wilwood: "Q: Why are some rotors drilled or slotted?
A: Rotors are drilled to reduce rotating weight, an issue near and dear to racers searching for ways to minimize unsprung weight. Drilling diminishes a rotor's durability and cooling capacity."

From Waren Gilliand: (Warren Gilliland is a well-known brake engineer in the racing industry and has more than 32 years experience in custom designing brake systems ...he became the main source for improving the brake systems on a variety of different race vehicles from midgets to Nascar Winston Cup cars.) "If you cross drill one of these vented rotors, you are creating a stress riser that will encourage the rotor to crack right through the hole. Many of the rotors available in the aftermarket are nothing more than inexpensive offshore manufactured stock replacement rotors, cross drilled to appeal to the performance market. They are not performance rotors and will have a corresponding high failure rate"
From Baer: "What are the benefits to Crossdrilling, Slotting, and Zinc-Washing my rotors? In years past, crossdrilling and/or Slotting the rotor for racing purposes was beneficial by providing a way to expel the gasses created when the bonding agents employed to manufacture the pads...However, with today's race pad technology, 'outgassing' is no longer much of a concern...Slotted surfaces are what Baer recommends for track only use. Slotted only rotors are offered as an option for any of Baer's offerings."

Grassroots Motorsports: "Crossdrilling your rotors might look neat, but what is it really doing for you? Well, unless your car is using brake pads from the '40s and 50s, not a whole lot. Rotors were first drilled because early brake pad materials gave off gasses when heated to racing temperatures, a process known as "gassing out." ...It was an effective solution, but today's friction materials do not exhibit the some gassing out phenomenon as the early pads. Contrary to popular belief, they don't lower temperatures. (In fact, by removing weight from the rotor, they can actually cause
temperatures to increase a little.) These holes create stress risers that allow the rotor to crack sooner, and make a mess of brake pads--sort of like a cheese grater rubbing against them at every stop. Want more evidence? Look at NASCAR or F1. You would think that if drilling holes in the rotor was the hot ticket, these teams would be doing it...Slotting rotors, on the other hand, might be a consideration if your sanctioning body allows for it. Cutting thin slots across the face of the rotor can actually help to clean
the face of the brake pads over time, helping to reduce the glazing often found during high-speed use which can lower the coefficient of friction. While there may still be a small concern over creating stress risers in the face of the rotor, if the slots are shallow and cut properly, the trade-off appears to be worth the risk. (Have you looked at a NASCAR rotor lately?)

AP Racing: "Grooves improve 'cleaning' of the pad surfaces and result in a more consistent brake performance. Grooved discs have a longer life than cross-drilled discs."

[darkcloud]

Originally Posted by DTMhunter

what?

The drilled rotor has less surface area!

Not the surface area of the entire rotor shit head. The amount of space for heat and debris to escape. There are a lot more little holes for this to take place then a couple mm etched lines.

[Hunter399]

easy buddy

[ScheerSpeed]

shouldnt the vendors be trying to sell drilled rotors since they are more expensive? not trying to bash them?

im jk, but seriously, a drilled rotor cools MUCH better than slotted.

[Hunter399]

Tire rack goes as far as saying if you plan on tracking do not use Drilled!, use Slotted!

[darkcloud]

Originally Posted by ScheerSpeed

shouldnt the vendors be trying to sell drilled rotors since they are more expensive? not trying to bash them?

You would think so huh

[Hunter399]

Im being honest, and no, drilled are no more expensive than slotted

[ADHD]

Originally Posted by hunter399

Tire rack goes as far as saying if you plan on tracking do not use Drilled!, use Slotted!

Tirerack also deals with everyday drivers that track there car!!!
As a everyday driver id say go with slotted but as a RACE CAR id have to go with DRILLED!!

[darkcloud]

Originally Posted by hunter399

Tire rack goes as far as saying if you plan on tracking do not use Drilled!, use Slotted!

Yea for life expectancy reasons. Plus most people don't have a track queen, they use their daily. Who would want to be roasting through drilled rotors every couple months?

[Hunter399]

Originally Posted by ADHD

Tirerack also deals with everyday drivers that track there car!!!
As a everyday driver id say go with slotted but as a RACE CAR id have to go with DRILLED!!

Ya, they say if you goto the track dont use drilled, exactly my point

[Hunter399]

There is no doubt the drilled look WAY cooler

I have drilled brembos on my car

[darkcloud]

Originally Posted by hunter399

Ya, they say if you goto the track dont use drilled, exactly my point

Yea for the average shmo without a track dedicated car or tons of money to throw out the window.

[darkcloud]

Originally Posted by hunter399

There is no doubt the drilled look WAY cooler

I have drilled brembos on my car

Yeah.... cuz your spoiled Seriously a joke, all in good fun.

[ADHD]

Originally Posted by hunter399

Ya, they say if you goto the track dont use drilled, exactly my point

LmAo hunter!!! DUDE im saying that a DAILY DRIVER CAR that goes to the track rarely... They dont want to have the responsibility of it cracking so of course there going to recommend slotted..
Just an FYI remember what the post said..NO manufactur suggestions!