RydeOn said:Didnt waste my time reading all the bickering but... Those that say slotted or cross drilled rotors dont work better on the street obviously havent driven that many cars. All the ones Ive used I noticed an IMMEDIATE difference. They are not cosmetic upgrades, they actually do work, quite well.
Not true. I have done this back to back alot of times. No flames but u cant really say they dont offer a performance advatage unless youve driven something that has them. Anything performance oriented has them; Porsche, Mercedes, crotch rockets (u name it) hell even my quad sitting in my garage has them. Any vehicle with these on, has better breaking than the same vehicle that dont have them on. I think maybe you all are trying to rationalize not putting an upgrade on your car. But your missing out, seriously.Mustang5L5 said:If you put ANY new rotor on a car, you will notice a difference. Over time, people tend to glaze the rotors and performance decreases. Slap a brand new set of rotors and pads on your car and what a difference.
93 teal terror said:Ok, I have a question....I ran the calculations and IF the pads redistribute load due to less surface contact, in theory your frictional force would be greater. This is assuming that when you decrease the surface area your normal force on the rotor increases. But if the brake pad does not redistribute the load it wont matter. So my question is do brake pads redistribute loading???
Mustang5L5 said:You also gotta remember that you are also decreasing the surface area of the pad appying the force. You are taking area away from both the rotor and the pad since no force can be applied by either body in the areas that are dimpled and slotted. The applied force is the same.
I don't think you can look at this static like a tire resting on the ground. You need to take into account the coefficient of friction which would increase with the larger surface area. Is it enough to equal more stopping power? Eh, i don't feel like getting out my engineering textbooks and figuring it out right now.
Let's just the dumbed down approach. Take a brick. Pit the point of your finger on the top and push down and attempt to drag it. Now do the same with the palm of your hand. It's easier to drag the brick with your palm with even less force.
Too much engineering thinking tonight..i'm going to bed
RydeOn said:Anything performance oriented has them; Porsche, Mercedes, crotch rockets (u name it) hell even my quad sitting in my garage has them. .
93 teal terror said:Yeah this is really bothering me, ive already had the statics and dynamics books out. Im a Civil Engineer and I think your a Mechanical? If so, you guys deal more with things like this where us civil guys mostly deal with static structures and such.
93 teal terror said:If the coeff. of friction increases with surface area, then the slotted/drilled rotors are a mute point. However if the coeff. is constant and the Normal force is constant then yes cross drilling would stop faster. If your sayin that the coeff. of friction increases with surface area, then that makes me feel better and i can go to bed.
Mustang5L5 said:haha...i don't know. I am confusing myself. Now I want to say that the coeff of fric. will remain constant and the are of contact will be the variable. However i am starting to second guess myself and want to run and check out my book. Engineering is all looking stuff up anyway. I'd rather get some numbers or equations or something hard before i get too involved with this if you know what i mean
I'm gonna hold off on an answer til i've had a while to dwell on this for the night. Gonna go whip my dynamics book out and see what i can find out
latham83 said:no one answered my quesiton! what mc do i need with the 73mm calipers...what brand and where can i get it?? how much are they>
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