Im think of upgrading my brake system but dont realy want to spend the money on a hole conversion kit, i was havin a little fun driving around and stuff this weekend and my brakes got realy spungy and smelled bad after a little while, they were also a purpleish/blueish color when i got home.
Im thinking of getting some drilled and slotted rotors but im just wanna know if it helps or is it a modd people do just for looks.

 

drilled=bad...

 

I noticed a little quicker stopping but i dont realy do much "hard" braking. I would recommend going with just the slotted... dont get the drilled ones, alot of people told me and i have seen that they crack around the hole. and the slotted still look kool through your rims ;-)

 

Ya i have heard some cases were drilled crack, but is this because of cheap brand or does it just happend, i have a friend with a 300zx but he got his from ebay, they didnt even have a name brand. But i think im goina go with just slotted cause i sometimes do some hard braking.

 

i've done some pretty darn hard breaking with mine and I thought of it as night and day. though it has a lot to do with pads as well, they grab harder to begin with and don't fade. i personally have drilled and slotted and mine haven't cracked, but i've heard the same complaint as well. if these things do crack, i'll probably just go slotted.

 

Were the Drilled from Brembo/APR??

 

brembo is a good brand. you can trust them. So they wont crack if they are a good brand.

 

mine are brembo

 

brembo here... Ive heard lesser brands warping under extreme use so i paid a little more for the brembos.

 

i have drilled and slotted rotors, check out irotors.com, they sell them cheap as hell and they are good quality, check my homepage for pics

 

are cross drilled also lighter than the stock rotors ? this would be more weight reduction off the wheels im thinking ... not sure !

 

Spongey brakes = boiling brake fluid.

Drilled and slotted rotors are worthless for street driven cars. Racecars have enormous drilled and slotted rotors because they do most of thier stopping from 150+ to 70mph, not 70mph to 0mph. Racecars have horrible braking performance from 70-0mph because their setups can't warm up quick enough. Drilled and slotted rotors are just another "racing image" product that's made it's way into the street aftermarket scene. It's all about the looks and nothing about the performance.

If want a good street setup, get some quality rotors (Brembo blanks $50 each), quality street pads ($60), Goodridge brake lines ($120), quality brake fluid ($8), and possibly 300ZX calipers ($150?).


Dave

 

i wouldn't just say they are worthless. in braking, more friction mean better braking. why do people get bigger calipers and rotors, so that more pad is touching the rotor and boom, more friction. so we kept all our other stuff and went with crossed drilled and slotted, or just slotted. what does that create.... more friction.

 

From what I read x-drilled rotors are bad because they do what they are supposed to do. The holes are supposed to release gasses from the inside of the rotor and they do except that those gasses actually attach to the brake pad and the outside of the rotor and decrease life and stopping power. Something among those lines.

BlueBOB, I know you're probably right but how can rotors with less contact area(drilled) have more friction than normal rotors with more contact area???

 

I second that, actually its not about friction in essence since the disc area is reduced. but its the fact that the rotor now has directional slots in it, that help to "release trapped gasses" (thats what i've been told) but i do understand that the cross drilled rotors, and then the idea of the slots, is used to help dissipate heat, just like how a radiator works, imagine if your radiator was a big "rectangular box of coolant flowing thru" it would do its job at circulating the coolant, and letting cool air blow on(not thru anymore). but by breaking up the surface area of the actual surface, you are able to actively reduce the amount of heat by a great amount. In automobiles heat is our number one enemy in many instances , i.e. amps, brakes, engine temp, tranny, wires. and one last thought. do you remember when your mom used to cut up ur food into smaller squares for it to cool down quicker, same concept.


forgive me if i am wrong... :-)

 

You are pretty much correct. There are no "trapped gasses" though...the slots just provide a path for air to flow and cool the rotors. Crossdrilled and slotted rotors have reduced surface area and on normal street cars, the trade off between heat dissipation and surface area is not worth it unlike in high speed race cars.

 

OK OK OK........whats supposed to be better....Drilled or Slotted ???

I was thinking about getting the Slotted rotors that customMaxima has...

Would there be much of a diffrence other than lookin all pretty ???

 

If you want a good street setup, get some quality rotors (Brembo blanks $50 each), quality street pads ($60), Goodridge brake lines ($120), quality brake fluid ($8), and possibly 300ZX calipers ($150?).


Dave[/QUOTE]



Where could I get the Brembro Blanks???

 

Where could I get the Brembro Blanks???[/QUOTE]

www.tirerack.com

You can get everything from them except the 300ZX calipers



Dave

 

Like i said my rotors tuned a purple color, kinda anadized or something, that should tell i wasn't doing 30-0 braking, but im gona do everything u listed for a street setup exept the 300zx calipers cause i looked around and they cost to much money and there is some fitment issues.

Also what pads do you guys recomend? O tire rack i see the hawk street and the EBC one? any other good ones ?

 

i don't mean to keep pushing this issue but I thought i'd add that according to a buddy of mine, who's also an org member, the cross drilled holes USED to be used to dissipate gasses created by the pads and the rotors. The material used to make the pads would create these gasses under pressure (ie braking) and would lower braking response and capability (forgot excatly how).

I work with quite a few machinists that also work on cars for fun. their thoughts, it's less metal so it'll cool faster, but cross drilled kinda pointless. as stated above, it's just somewhere for the rotor to crack. i've put mine under quite a lot of pressure and they have yet to crack (crossing fingers).

go slotted.. you won't be dissappointed.

 

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