Hi I was thinking about getting some drilled slot rotors. I want to see what they would look like so if everybody could post some pics that would be awesome and if the up grade is worth it . THanks
They don't upgrade your braking power, they let you brake harder-longer. Most people will never see any many benefits (those who basically abuse them will).
This is the only pic I have...
Stock size CD/S Rotors.
As CTS mentioned, they don't increase braking power at all. However, the only gain I have noticed is a reduction in brake fade when driving in the rain (and with me living in Washington, I know all about rain)
i have the baer rotors on our site for i think something around $160 shipped, great rotor esp when matched with a decent ceramic pad! i would say go for them and one other benifit they look better then stock
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How are drilled/slotted for warping? My OEM rotors in the front are warped right now and I need something that will hold up for a while atleast. I only feel the shaking in the brake pedal when slowing down from highway speed. In the city you dont knotice it b/c you dont get going that fast.
Regards,
Overheat + Not Moving = Warped. Since drilled/slotted/etc dissipate heat faster they're harder to warp. They're also ususaly made of sligtly superior materials so that helps a bit too. They can still warp though. Especially doing several panic stops then stopping the car will warp any rotor.
We have the Baer rotors and Hawk pads as a every day low price of $169.98 and have many in stock. Shipping is very cheap too.
-Aaron
www.TurboTechRacing.com
Performance Parts For Cavalier, Sunfire, Cobalts and More!!!
^im not sure if thats true or not but does make alil sense but i prefer the slotted and drilled rotors they look better!
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www.sinisterimages.com
Slotted and Drilled have up to 10% less surface area. That does not reduce braking ability. But pads do wear slightly faster.
Read the brake Sticky.......rotors don't warp, the rotors might resist high heat material transfer better, thus keeping the friction coefficient constant rather than change around the rotor.
Once you get the ceramic or other brake material ttransferredinto the rotor the thickness changes in that place. Then when you brake again you get that pulsed braking feeling. Then when the driver makes a turn and the wheels turn at different speeds thus making the higher and lower thickness surfaces happen at different time relative to the caliper which is fixed on both sides you get the steering wheel pull to one side then the other.........this is NOT caused by rotor warp.....never will be.....not gonna happen. NEVER. Read the brake sticky. it talks all about this.
As for the drilling reducing bbrakingability, it does. Pressure mmultipliedby the surface area in contact with the rotor is turned into a "Normal force" (meaning a force that is 90 degrees off of the rotor in both the X and Y coordinate) onto the rotor via the brake pads. Then this force multiplied by the friction coefficient of the rotors gives the slowing force, or drag force applied at the rotor. Pressure = Force per Area -or- P=F/A(psi) --> F=P*A
As the Area decreases as with drilled rotors, and as the pressure is held constant (the same pedal pressure is applied by the driver) the force is decreased.
Lets say:
P = 1000psi
A = 2in x 5in = 10in^2 -non drilled rotor
F = ?
F = P*A --> F = 1000lbs/in^2 * 10in^2 = 10000lbs is applied as the normal force.
Once the area is reduced by drilling or slotting lets say from 10 to 9 or so:
F = P*A --> F = 1000lbs/in^2 * 9in^2 = 9000lbs is applied as the normal force.
This shows if you have drilled or slotted rotors you WILL need to press harder to achieve the same normal force as with stock, non-drilled or slotted rotors.
Let find the required pressure of the drilled and slotted rotors to get the same normal force as the stock rotors:
P = ?
A = 9in^2
F = 10000lbs
P = F/A --> P = 10000lbs/9in^2 = 1111.11lbs/in^2
Therefore with the drilled and slotted rotors in this example, the driver will need to press roughly 11% harder than you would on otherwise on your stock rotors.
Now, this 11% higher force then creates more heat, however like CTS said they do dissipate heat faster thus making up for this 11% harder force.
I hope this clears some thing up.
Turbo Tech Racing wrote:We have the Baer rotors and Hawk pads as a every day low price of $169.98 and have many in stock. Shipping is very cheap too.
Get these, i did. mine was more than that though.i beat the hell outa my brakes and these are still full of life.
Plus aaron is a great guy to deal with through turbo tech.
