Thread: Delios discs

Originally Posted by martnH

Hahaha
This is not a text book promotion hahaha

Don't be salty. But I honestly don't think you know much about brake Rangieman.


I am not a mechanic. I don't even work in the field of automotive. But what I do have is solid basic knowledge of physics. (Yes I am armed with high school physics only)

My educated guess is slotted rotors will produce a worse braking performance and higher pad wear, given the brake pads is clean and doesn't require self cleaning often.

This is simply due to a reduced contact surface for the pad.

Say the friction coefficient of the brake pad remain the same, and of course, the size of the pad the same, then the slotted rotors will have a reduced pad contact surface compared to a plain rotors.

Braking is from friction. So slotted rotors will have a worse braking performance, holding all other variables the same.

As with that "braking gas" thing you talk about, I am gonna laugh at your out-of-date knowledge. Many many many years ago, the bonding in the brake pad is not good and will disintegrate during high temperature, producing gas
But Nowadays, it not a problem.

Secondly the slot/groove will produce a "cutting effect". Mind you this is not the braking friction we desire. And this is also why you may have so-called "brake.dust" in the groove. I think those are graded pad material rather than dust. Yes the slot clean the pads but remember you only need to clean the pad if contaminated.

slotted brake is really a trade off.
Worse braking vs. pad cleaning (plus high pad.wear). If you want better braking go plain. But if you worry pad contamination, go slotted.

If you look at the rally cars, you will see some run plain rotors some run slotted rotors.

Go talk to an expert and get your facts right before promoting your products.

I don't think you know enough to inform what rotor is good.

Have a nice day
Martin

You got the cheek to say i don`t know much about brakes Ha Ha Ha well thank you Sumner Miller

Originally Posted by rangieman

You got the cheek to say i don`t know much about brakes Ha Ha Ha well thank you Sumner Miller

Originally Posted by Roverlord off road spares

This is more appropriate
Julius Sumner Miller - Physics - Bernoulli pt. 1 - YouTube

Originally Posted by rangieman

This is more appropriate
Julius Sumner Miller - Physics - Bernoulli pt. 1 - YouTube

love the Failure!!!

The Prof was always great TV,,,

Originally Posted by Roverlord off road spares

No prob`s Elmer
Elmer Fudd - Be very, very quiet - YouTube

I personally like slotted rotors for a few reasons.
1. If a stone tries to embed in your pads and grind away your rotor the slots just break it up and eject it = no disc or pad damage.
2. If you come out of a mud bath or water crossing they clear off almost instantly on the first brake application = full braking, even cold and wet.
3. They do help with fade = more braking reserve if pushed hard.
4. The pads and discs wear evenly.
All of the above is from my experience of both slotted and plain discs on cars and 4x4s over decades. Not buying or selling here, just sharing my experience... Racing, too.
Negatives are they are more expensive, some can generate a light whirring noise under brakes, are harder to machine if required and may cause a slightly reduced pad life.
My two bobs... Either you see the benefit in them or you don't.

Originally Posted by rangieman

You got the cheek to say i don`t know much about brakes Ha Ha Ha well thank you Sumner Miller

Let me know if I am wrong.
I will appreciate that.

Mv=ft. So higher stopping force will give you shorter brake time to reduce the Velocity to zero. If you can ignore the reduced mass from the slot on the rotors.

I don't get what you saying.

T=MV/F. So higher friction shorter time to reduce the momentum.......


Will slotted rotors give better cooling? I don't know.if you consoder it has less mass, but more surface area. Maybe maybe not.

Also if you really consider the mass difference, then the slotted rotors will absorb less energy to reach certain temperature. Meaning it will run probably hotter compared to plain rotors. Given the unclear benefit of cooling from the sloot.