FRPP slotted/cross drilled brakes.

freefallin98 · Sep 1, 2007

Are they good for only 150 per set? I know FRPP stuff is pretty quality so I was wondering if they are good for aftermarket. IF I do brakes, should I do some knew pads eve though I was told mine are still ok, but my rotors are warped? What does ceramic have over just traditional pads?

Mr. OAM · Sep 1, 2007

Slotted and drilled rotors are good for race cars because they will be changed quite often. The braking that occurs in racing is much more severe than you do in everyday driving so the slots and holes are effective at that level of use. However, on the street you get the opposite.

Braking on the street is far less severe and produces less heat. But with slotted and drilled rotors you lose surface area as well as mass, so the heat that is generated is absorbed by less material, actually causing the rotors to run hotter than regular rotors. You don't have the same ducting of air to the brakes as a race car and you are not traveling at the same steady high speed as a race car to be able to move the same volume of air through the rotors. The end result of this is the rotors building up hard spots prematurely compared to a regular rotor and cracks soon appear. The rotors with slots and holes will need to be replaced at a much sooner interval than regular discs.

Now if you are only concerned with the look of the brakes and you have rims that allow a good view of the brakes then go ahead and get them.

Ceramic pads are able to deal with heat better and suffer less deterioration. They also have less fade and brake dust.

Steve

96sohc · Sep 2, 2007

Slotted rotors are alright, drilled rotors are a waste of money.
If you're not going to be doing any kind of autocross/open track, Brembo blanks and your choice of brake pads will suffice.

freefallin98 · Sep 2, 2007

Ok, but what if I run my car fairly hard cornering and braking significantly harder than most....will these be a good choice? And I guess I understand why they arent good for street driving, but not really. So what you are saying is that they have less material, but allow more air to pass through. SO why would they not be a good idea? And yes, I do have some nice looking wheels that red brake calipers would really set off along with the slotted brakes. So would it be better for me to just ge tsome slotted ones and not cross drilled, or both?

Thanks,
Free

96sohc · Sep 2, 2007

For street driving, I'd either get slotted or Brembo blanks, the only benefit of a drilled rotor is aesthetic.
Combine those rotors with a good set of pads, such as Hawk HPS' or a mild Carbotech and you'll be doing alright.

DropTopPony · Sep 2, 2007

I use the FRPP slotted/drilled and so far so good...they have been on for about 3 years now but only have about 5k miles. They look pretty

freefallin98 · Sep 2, 2007

They LOOK pretty...how about the performance? Could you tell quite a bit of a differance over stock? Also what type of pads are you running. Did you install yourself?

Pennywise2 · Sep 3, 2007

Don't get slotted or cross drilled rotors unless you go to the track or auto x alot.
Stock or Brembo blank rotors will work just fine for street driving.
In my experience I have seen quite a few people have there slotted and cross drilled
rotors get really hot from street driving and crack on them.

freefallin98 · Sep 3, 2007

Oh so how much do brembo blanks run? But I really want the look of slotted rotors!

96sohc · Sep 3, 2007

$47ea from Tirerack.
http://www.tirerack.com/brakes/brakes.jsp?&make=Brembo&model=Replacement+Rotor&group=Replacement+Rotor&autoMake=Ford&autoModel=Mustang+GT&autoYear=1998&autoModClar=&perfCode=P

Drilled rotors are crap, you'd be buying them only for looks.

Hybridbird · Sep 4, 2007

Holes are for the sex!

DropTopPony · Sep 4, 2007

There was no difference in performance over a regular rotor...they are totally for looks and if you want serious braking/track duty don't get drilled.

Jrgunn5150 · Sep 6, 2007

Mine are drilled and have about 20k on them, so far they are fine, and they look cool.

freefallin98 · Sep 6, 2007

Nice, I think I am going to get them when the times comes

Mr. OAM · Sep 7, 2007

freefallin98 said:
Ok, but what if I run my car fairly hard cornering and braking significantly harder than most....will these be a good choice? And I guess I understand why they arent good for street driving, but not really. So what you are saying is that they have less material, but allow more air to pass through. SO why would they not be a good idea? And yes, I do have some nice looking wheels that red brake calipers would really set off along with the slotted brakes. So would it be better for me to just ge tsome slotted ones and not cross drilled, or both?

Thanks,
Free

The purpose of the slots are for the gasses that are produced by the friction material on the pads to escape during racing and hard braking. The holes are for the ducted air to blow through to help cool the rotor.

As for why the rotors heat up on the street, imagine a regular rotor and a slotted and drilled rotor of the exact same size. The one without the slots and holes has more metal to it which means there is more material to absorb the heat from the pads making friction. In the rotor with the slots and holes there is less material to absorb the same amount of heat, so it gets hotter sooner because of the lack of ducting of fresh air like in a race car. This means it is subjected to more heat than a regular rotor and suffers from building hard spots (especially around the holes) sooner which can cause a pulsating pedal and cracks in the rotor.

It also depends on how you drive the car. If you drive it carefully you will not see these results as fast. If you drive it the way you intended, which was the reason for getting performance brakes in the first place, then they will show up sooner.

Steve

racingrosey · Sep 7, 2007

96sohc is correct here. Anything other than the Brembo replacements are wasteful spending.

Standard Replacement rotors from Brembo are as good / BETTER than anything mentioned here. Brembo's very own website clearly labels their drilled/slotted rotors 'not recommended for track use'. That should be enough for anybody to realize it's a cosmetic upgrade, not performance.

The 1st few track weekends in my car I had rotors crack completely though. I've put nearly 2K track miles, and probably 5000 street miles on the cheap 50 dollar brembo replacements and haven't had any issues.

Your brake performance is going to come from your brake pad choice. Want good brake pads? Get Hawk HP+ pads for the front. Sure they make dust and make some noise, but they STOP.

freefallin98 · Sep 7, 2007

Damn guys lol...you are really making me not want the slotted brakes...but they just look way better than a stock looking brake. :nonono: well...I wil keep thinking about it. The time is just around the corner...a few more weeks I think lol than im broke