New Rotors

[nismo_pilot]

hawk makes some good pads for the spec v, hp autoworks.com sells them i think, green stuff makes pads too but they are noisy, they stop your ass though

[Rowen'sSpec-V]

Any of you guys have any sites on some price efficient examples?

[slideways...]

heres the scoop on drilled rotors.

at the shop i work at, we service some state trooper squad cars. one comes in that has drilled rotors. i asked the cop about it, and she said she put em on because she warps stock rotors within 500 miles. i then asked how long she had the drilled ones on, and she said she had this set put on 1500 miles ago...i looked and there were already severe cracks starting to form all around the rotor. but they werent warped at all. for a sentra with less than 250whp, the only reason you would even need anything better than stock rotors is if you actually track raced it. even then, i would only get slotted rotors at the MOST. rotor size is MUCH MUCH MUCH more crucial than whether it has slots or dimples or holes or orifices or w/e. i said it before and ill keep saying it until people listen: pads, SS lines, and high temp fluid is all you need to stop fast. if you have that setup, only upgrade to larger calipers and rotors if you still get fade, which you wont unless you have huge hp and race your car. on a track. not a dragstrip or street.

[slideways...]

as a matter of fact, tires will help braking performance more than all the slots and holes in the world.

despite that, heres what you need:
stoptech SS lines, 79$ front, 79$ rear
ferodo DS2500 pads, 129$ front set
motul RBF600 fluid, 14.50$ bottle

matter of fact, stoptech sells a stage 1 upgrade kit for 340$ with all you need
Stage 1 Brake UpgradesStainless Steel Lines, High Performance Brake Fluid and Street Performance Pads Part NumberOptionsPriceOnHandQty 86.648.02220STANDARD339.00

[Rowen'sSpec-V]

Thats pretty helpful, but i'm gonna say my rotors now are gone. Where should i get some replacements, other than the ream you in the rear dealer? I can stick with standard. I was iffy about slots or drilled, but divoted ones might not have too many cons. Thats fine with me. Know where to get a good deal on standard rotors?

[slideways...]

i dont know where you are, but i would do some looking and try and source some OEM blanks made by brembo.

[Rowen'sSpec-V]

I'm in Ohio. Where might i look for such a thing? Are they fairly cheap?

[slideways...]

id start looking for larger brake supply places that supply retail stores and repair shops. you can usually talk them into selling to anyone. i dont know ohio so i dont know any stores around you. usually the big cities have many stores with connections you can at least special order from.

otherwise, contact brembo and ask where the nearest dealer is located

Brembo North America
Original Equipment
27280 Haggerty Road, Suite C-20
Farmington Hills, MI 48331
Phone: (248) 489-9197

[Rowen'sSpec-V]

That will be my little monday job.

Thanks

[kris]

I have seen too many people get hurt by negatively affecting their vehicles via modification and I feel braking is a VERY important system for this.

The reason for the creation of cross drilled rotors initially was to remove the "gasses" from the brake pads. HOWEVER, most of your modern brake pads (Axxis metal, AEM semi-ceramic) do NOT produce gasses when heating. This was on bad brake pads used in the 1950s and 1960s. Back then, asbestos was also used, and we dont use that either.

The other reason is so called heat dissapation. I don't have my old physics and thermo books with me, but the logic is that the holes in the rotor are suppose to allow the brake pad to cool. So...air gets into the rotor from the inside of the vents. If you have a back rotor which is solid, air gets into these holes how? If your stopped, you are leaving air inside these holes sandwiched between the pads, thus creating air with a rising temperature. Its increasing in pressure from the heat, which I guess you "could" call a gas that would affect braking. So the cross drilled rotors do not remove any gasses formed by brake pads (because there are none created anymore) but could possibly inhibit the creation of "hot spots".

Cross drilled rotors have LESS contact area because of the holes.
But if the rotor is cooler, its better, right? Well no, because these rotors are not cooler. THe heat is generated from the pad/rotor contact. What removes heat the most effectively? When stopped or moving, the pad transfers heat into the rotor because its made of cast iron. the rotor has a lot of surface area and even vanes in it. But the little holes allow air in this surface contact, and you can transfer more heat into a solid big *** chunk of cast iron more than you can into the air. Don't believe me? Touch some steam at 150 degrees, then touch a piece of hot metal which is at 150 degrees. Which burns your hand? the metal. So let the heat transfer into the metal, because since it has so much more surface area, dissapates better.

Safety!!
Cross drilled rotors can crack! I have seen them!!


Even racing teams will reccomend AGAINST cross drilled rotors:
http://www.livermoreperformanc....html


Companies that sell cross drilled rotors that are redrilled may not be structurally sound. I have actually seen pictures of rear Integra rotors that have had hairline cracks turn into the rotor actually breaking apart!

Do your homework. Even Porsche and Ferrari will admit that the cross drilled rotors they use are for looks. So if you are one of those people who thinks the little holes look cool, get a name brand drilled rotor like Ferrari does. The REASON Ferrari's 'holed' rotors are alright to use is because they are CAST with the holes in them, so they are not actually drilled into cast iron rotors. Cheap drilled rotors are not safe, and even the good ones are not necessary. Why do Ferrari do it? People THINK they want it, and it sells. If you don't believe me, go into the business world. You will learn that pretty soon, you can sell utter **** if people THINK its better.

Information I gathered from http://www.pdm-racing.com/prod....html
says:


"KVR Crossdrilled Rotors

Why should you upgrade to cross drilled rotors?

Simply stated, the function of any vehicles brake system is to stop the vehicle. This is accomplished by absorbing the kinetic energy stored in the moving vehicle, and converting it into heat. The friction caused by the brake pad rubbing on the rotor is the source of this heat. The more quickly and efficiently that heat can be absorbed and dissipated, the more quickly and efficiently the car will stop.

There are several contributing factors to this heat reduction. One of the most common sources of heat is from the gases produced by the bonding agents of the brake pad burning off. Under severe braking, this can actually produce a boundary layer of gas that pushes the pad away from the rotor, which can lead to excessive brake fade. The cross-drilled holes or slots in a rotor provide an escape path for these gasses (de-gassing or out-gassing are common terms), and allow the pad to stay in contact with the rotor. As well as de-gassing, cross drilling or slotting will provide better wet weather braking as water is swept through the holes, or down the slots.

A vented rotor can be viewed as an air fan. When in motion, the vents draw air from the center of the rotor outward. This air flow, over an increased internal surface area, effectively dissipates rotor heat. Cross drilling adds to this air flow, as well as providing additional rotor surface cooling. "

This company is just telling you that the rotors may be cooler, however they fail to mention that the holes really do create a more than substantial decrease in surface area, thus less braking, thus less heat created, thus the less heat CREATED will leave the rotors cooler, the holes barely do anything! Its the less braking lowering the temperature!

Slotted rotors-
Find me a company that uses stock slotted rotors. They remove brake dust, but if you study braking systems, you find that with modern cars, flat blank rotors and semi-ceramic pads, the brake dust causing the rotor to slip on it is almost non-existent. But the brake dust doesnt need all those lines. Notice how most front brake pads (and most back) have that line down the middle to give essentially two bite points. If OEM or racing companies found it to be a benefit, they would do it.

PROOF OF IT ALL:

Find me an F1 car as of now that uses cross drilled or slotted rotors. They all use full ceramic rotors and ceramic pads. Are they drilled or slotted? No.

If they helped the fastest cars in the world, wouldn't they use them? Its basic calculations that show the lack in surface area does not make up for the possible loss in temperarure. They use brake cooling air ducts insted.

BIG BRAKE KITS:
Some have asked if the big brake kits are worth it. This is sort of a relative question, but the simple answer is no. Regarding the big ones with drilled rotors, if you know that they are cast that way, at least they wont crack. I would still advise against them.

IN CONCLUSION:
Don't buy slotted or cross drilled rotors, blank are better, and stop better. Physics people, get me my formulas and help me out here.

If you must get rotors with designs on them, get the slotted ones by a good company, and DON'T get blank rotors redrilled with little holes all over them. IF you absolutly must have the rotors with holes cause you like em, get them from a company that casts the rotors like that. I have seen rotors break and this is for your safety!

REMEMBER......
Like what has been mentioned above, your car will only stop as fast as your tires will allow. All the braking in the world wont work if your tires are bald and on ice!!

[slideways...]

drilled/slotted rotors were created to address durability(warping) issues, not stopping distances. they do their intended job just fine. the only thing is somewhere along the line, a riceboi said to another riceboi that they help stopping distances, and a false myth was born

[ProZach626]

I WANT SLOTTED ROTORS FOR COSMETIC PURPOSES!!!!!!
Stop the freaking controversy... it's worthless and it's a waste of time.

Someone please close this damn thread, as well, as I can see the Spec V vs. SRT4 thread all over again. God...