nito88stang
Founding Member
sleeper89 said:so let me get this straight (as i'm not an engineer), you're saying that the coefficient of friction between the pad and rotor is equivalent (or very close) to the coefficient of friction between the pad and the (air in the) holes/slots? please do elaborate.
-steve
chaka said:The friction force between the pads and a solid rotor and the pads and a drilled rotor are the same. Put the holes back in and the friction force will be the same. (assuming no temp. increase and the rotors are the same material and the pads are the same material)
astronut1885 said:When I swapped over however, I did notice better braking than last time I did brakes and went with stock. I had less fade and quicker stops overall. Both sides have good arguments, but I think only a road test can settle it. I personally like slotted rotors. They've worked for me, and they look nice in the wheel well too. Just my .02
custom89stang said:THATS IT YOU DUMB$HITS I'M CALLING MY GRANDPA (head of PHYSICS AT THE UW) and asking him. Case settled tonight.
custom89stang said:93tealterror, there is less weight and it will grab the dimples and holes better than an all flat. But as i say next.......we will find out.....
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BlackFox5.0 said:Are you comparing old glazed over brakes to brand new pads and fresh cut rotors?
They only way to compare the difference is to have them both have the same mileage AND abuse put on each brakes. Even though the braking difference between drilled rotors and stock rotors is marginal, the stock brakes are still much better to go with. They are cheaper, save pad life, work more effeciently, and in many cases will not warp, and especially not crack.
The only time you should have drilled rotors is if you Road Race and make frequent high speed to low speed stops very quickly.
93 teal terror said:Again...Slotted,Drilled,Dimpled rotors will NOT increase stopping power better than a solid rotor (assuming there is no build up of gasses).
custom89stang said:Slotted/dimpled rotors are better.
chaka said:well the CF between the air and metal is definitly lower then the CF between the pad and the metal.
But when you say the friction force between the rotor and pad you are saying that. so it does matter about the air. The force between the rotors and pads are the same.
When you take into account the pressure the MC puts out into the brkae lines and how the brake fluid compresses and how the fluid pushes the piston and the size of the piston and then how the friction force relates to heat transfer and blah blah. So there is a lot more to braking then the friction force.
sorry for getting all ansty. just aggravating to here that friction force is affected by area. to think mustang5l5 said that. too haha