Brakes

[grey]

I need to replace my front rotors because I took to long to get the pads replaced. The question is what are the advantages of drilled and slotted Rotors? And if I put them in the front should I also have them in the back?

Secondly, any opinions on the type of brake pad to use?

Thanks,
Grey

 

[Captain KRM P5]

drilled and slotted rotors dissipate heat faster and depending on the material, have superior heat transfer. your stopping distances will improve, your brake response will be faster and coated rotors do not rust like OEM ones do.

we sell EBC rotor and pad packages which are what we consider to be the best street and performance setup.

 

[Rogue]

good reading about it here: Flat vs Cross Drilled vs Slotted vs Cross Drilled & Slotted

Not to take from Ken's sales, but if you decided to go with OEM style (smooth) rotors, get a set of Brembo blanks from Nopi (local shops available). I spent way too much on buying OEM parts from Mazda.

 

[kcbhiw]

D/S rotors only increase heat dissipation factionally. Their primary purpose, however, is to relieve outgassing that is created under the pressure and heat during braking.

On a daily driven car, you will notice no advantage to D/S rotors.

 

[Rogue]

D/S rotors only increase heat dissipation factionally. Their primary purpose, however, is to relieve outgassing that is created under the pressure and heat during braking.

On a daily driven car, you will notice no advantage to D/S rotors.

according to some stuff I've read, the drilling really helps with getting water away from the surface, and doesn't help with dry braking. Slots do help with the venting of gasses, but that's why the pads have slots themselves.

Another thing you'll get with Drilled/Slotted rotors is decreased pad life. You're pretty much rubbing them against a cheese grater/slicer.

 

[BigB]

according to some stuff I've read, the drilling really helps with getting water away from the surface, and doesn't help with dry braking. Slots do help with the venting of gasses, but that's why the pads have slots themselves.

Another thing you'll get with Drilled/Slotted rotors is decreased pad life. You're pretty much rubbing them against a cheese grater/slicer.

Agree with pretty much everything Luke and Kevin say here... I don't really know of many road racers (Improved Touring mostly) or HPDE people who run CD/S rotors. They usually buy the cheapo Chinese rotors and toss them after events.

Now the question will be why do Porsche's and Corvette's and the like have them on the car from the factory....

One word: Homologation.

By having these on production cars it readily makes them homologated or available to run in certain international race series.

 

[RacerXGirl]

Agree with pretty much everything Luke and Kevin say here... I don't really know of many road racers (Improved Touring mostly) or HPDE people who run CD/S rotors. They usually buy the cheapo Chinese rotors and toss them after events.

Now the question will be why do Porsche's and Corvette's and the like have them on the car from the factory....

One word: Homologation.

By having these on production cars it readily makes them homologated or available to run in certain international race series.

You were just waiting for an opportunity to use the world homologation, weren't you?

 

[Hughes412]

I need to replace my front rotors because I took to long to get the pads replaced. The question is what are the advantages of drilled and slotted Rotors? And if I put them in the front should I also have them in the back?

Secondly, any opinions on the type of brake pad to use?

Thanks,
Grey

LMFAO!!!!!!!!!(rlaugh) (lol2) (rlaugh)

You were just waiting for an opportunity to use the world homologation, weren't you?

You beat me to that. Damn!

Well I wont go into it AGAIN, but if you read this thread you should have more than enough info to make an informed decision.
http://www.mazdas247.com/forum/showthread.php?t=123650347

 

[Shadow102]

http://www.stoptech.com/tech_info/faqs.shtml

Here is another thing to check out straight from the people who base their business on brakes. Cross drilled rotors are a waste of time for high performance applications...the only performance upgrade you gain from cross drilling is weight advantage and even then you are losing stopping surface. If you do anything get slotted.

 

[grey]

Thanks

Thank you for everyone's responses.

One thing is that they look cool.

 

[Shadow102]

Thank you for everyone's responses.

One thing is that they look cool.

yeah no doubt they came on my car when i bought it and it just adds that something extra i would still rather have slotted though

 

[Gaboost]

Yeah I agree with Luke. I have no experience with drilled/slotted rotors personally but I've heard they eat the pads up faster also. I would go with the brembo blanks, good price and they work.

 

[Hughes412]

Yeah I agree with Luke. I have no experience with drilled/slotted rotors personally but I've heard they eat the pads up faster also. I would go with the brembo blanks, good price and they work.

But that's why you here stuff like that. People that do not own them keep spreading the romors that they don't work or eat pads. Yet if you ask the people that have them most (there is always that one or two that have problems) will tell you they saw a nice improvment in brakeing. As I've stated I've had mine for 30+k miles and I have 50k on the car and stock pads. The only way they will eat pads is if you race every day or get a bad set that are not debured. And that is an easy fix.

 

[BigB]

Well... I guess when Matt from Carbotech Engineering told they are not really needed and suggested Brembo/Chinese cheapo blanks I should tell him he has no idea what he's talking about right?

 

[Hughes412]

Well... I guess when Matt from Carbotech Engineering told they are not really needed and suggested Brembo/Chinese cheapo blanks I should tell him he has no idea what he's talking about right?

Look I don't want to get into another debate on these. I do not see Matt saying that these rotors are no good and give no gains in braking.
But if you look at what YOU said HE said (it's in red) I believe you'll see that it's almost just like what I said! (In the other thread)

Everyone knows that in the old days the D/S rotors were what you needed if you wanted to stop. Then the pads changed. But that does not make the rotors less effective.
1 good rotor + reg pad = +1 brake
1 good pad + reg rotor = +1 brake
1 good rotor + 1 good pad = +2 brake!
See it's easy math!(first)

 

[thewrench]

I did have slotted rotors, and I saw no gain in performance or increased wear. I'm running Brembo blanks now because they are much cheaper.

 

[aMaff]

1 good rotor + reg pad = +1 brake
1 good pad + reg rotor = +1 brake
1 good rotor + 1 good pad = +2 brake!
See it's easy math!(first)

1 + 2 = chair....