Why is there so much area left?

[mgcook]

I'm replacing my front brakes. Everything is the right part #'s. But after looking, why are my pads so much smaller than the actual rotor...it looks like the pads would cover alot more area on the rotor than they actually do...i see no point in a 13" rotor if the pad can't cover every bit of it

pics:

 

[95BlueStallion]

That pad doesnt look right... I dont have 13" rotors, but I agree that the pad should cover more surface area. I would talk to whoever you ordered them from...

 

[mgcook]

the pads came from summit. they are the correct pads. and the rotors are the correct ones as well

 

[The Green GT]

They are going to be a little small, but I think that looks a little too small.

 

[bimmertech]

and that is why i don't like cobra brakes----thats the way its supposed to be.

might wanna spray some paint around the inside to keep the rotor from rusting and looking like ****.

 

[mgcook]

and that is why i don't like cobra brakes----thats the way its supposed to be.

might wanna spray some paint around the inside to keep the rotor from rusting and looking like ****.

i guess i'll see once i get the stock ones off...but the rotors are covered up so they won't rust.

 

[trav_19]

your rotors are covered up....how does that work?? what did you use to cover them? or are you talking there covered before they go on??... i never understood what good a larger rotor will do for you when your braking contact patch is the same size.....

 

[The Green GT]

your rotors are covered up....how does that work?? what did you use to cover them? or are you talking there covered before they go on??... i never understood what good a larger rotor will do for you when your braking contact patch is the same size.....

I think that if the area of contact is further from the center of the rotating mass then it will stop better. Next time you have your front jacked up get the wheel spinning and try to stop it with your hand on the tread, then try again with your hand somewhere closer to the lugs.

 

[Black95GTS]

I think that if the area of contact is further from the center of the rotating mass then it will stop better. Next time you have your front jacked up get the wheel spinning and try to stop it with your hand on the tread, then try again with your hand somewhere closer to the lugs.

This is absolutely correct. You can apply exponentially more force on a rotating object by increasing the tangential distance of the force applied to that object. It's called increasing the moment arm of the system.

The other way you can make your brakes work harder to is install calipers with more clamping force (your brembo's, etc with 4-6 pistons). This will increase the coefficient of friction that the rotor's experience.

Adam

 

[1TallMF]

Wow, I had no idea Cobra pads were that small...

 

[ProKiller]

This is absolutely correct. You can apply exponentially more force on a rotating object by increasing the tangential distance of the force applied to that object. It's called increasing the moment arm of the system.

The other way you can make your brakes work harder to is install calipers with more clamping force (your brembo's, etc with 4-6 pistons). This will increase the coefficient of friction that the rotor's experience.

Adam

huh?

haha, some really engineering explinations. top quality

 

[trav_19]

oh well my stock ones stop the car....this cars not a nascar or nothing stockers work just fine for me

 

['94ChickStang]

That's how my bullitt brakes are and that's how it's supposed to be, just paint the rotor with clear high temp paint so the inside ring that the pads miss don't rust....