Author Topic: How brakes really work on your car. (Read 2753 times)

Industrial Cafe · « **on:** January 10, 2009, 03:59:19 PM »

here's an excerpt from a .....misinformed? person on a pontiac solstice forum about drilled and slotted rotors, coated with some rust prevention coatings.
I thought it was funny.

Quote

Originally Posted by MadMods

Bling? no way. They give you a choice of coatings to keep the rust off. I'm going to pair these rotors with RotorOs new calipers to give me some serious bite. My stockers can't handle the extra power I have.

here's the reply (funny part)

Quote

---------------------------------------------------------------------------------------

Someone should explain to you how brakes work.

Oh and keeping rust off does fall under the Bling category.

No these are not a performance upgrade. Brakes work by transferring movement into heat. Tires stop the car. What determines how well the brakes work is there ability to disipate heat. Cross drilling rotors doesn't help to dissipate heat and this has been proven time and time again. What is does is give you less surface area to get rid of the same amount of heat. In effect you have just done a brake down grade. When the rotors do get over heated they are gonna end up cracking at the drilling points. I'll stick with brembo rotors when it's time to replace mine thanks.

If you have plans of doing any road racing you may want to consider a real brake upgrade. Again it has been proven time and again that a larger rotor doesn't mean you will stop faster(tires stop the car not the brakes). What it does do is prevent brake fade. If you haven't experienced this it's a rather scary LOL.

Brake rotors are heat sinks. Heat sink to the best of my knowledge still work by having surface area to dissipate the heat. Drilling holes and losing this surface area doesn't help improve the rotors ability to do it's job. Which again is to dissipate heat. They do not stop the car, tires friction against the road surface stops the car!!!

Now I know someone is gonna say "well motorcycles and sports cars have there rotors drilled". Yes they do and there is a reason for this and there is a reason they can get away with it.

If you really want to do a brake upgrade the most inexpensive thing oyu can do is run brake ducts. The gxp already has tubes near the fog lights to do this. Not only do this imporve braking there is no rotating weight penalty. 5 extra pounds for big brakes if you don't need them is hurting your performance. But they do look cool

I'd hate to have this guy upgrade my car.

333 · « **Reply #1 on:** January 10, 2009, 04:11:24 PM »

I hope that others on that forum jump down this guys throat and straighten him out. He is, sort of, on the right track about heat dissipation, but the next time someone cuts him off in traffic, I hope, for his sake, that he hits the brakes, and not the tires to stop his car.

Industrial Cafe · « **Reply #2 on:** January 10, 2009, 04:21:54 PM »

hahaa! i know.
I thought it was funny also, because the brembo rotors for his car have a little disclaimer sheet in the box that says. "Not recommended for track use. Do not use with race compound brake pads. Drilled rotors are not warranted against warping or cracking."

bryanj · « **Reply #3 on:** January 11, 2009, 04:33:22 AM »

And the real funny thing is most of these numbnuts happily fit biggere diameter wheels and tyres which increases the turning torque and decreases breke efficiency

Industrial Cafe · « **Reply #4 on:** January 11, 2009, 07:24:23 AM »

haha, yeah... hey!?
http://forums.sohc4.net/index.php?topic=44885.0
i plan on a dual disc setup to go with it.

HavocTurbo · « **Reply #5 on:** January 11, 2009, 11:24:14 AM »

Quote from: Industrial Cafe on January 11, 2009, 07:24:23 AM

haha, yeah... hey!?
http://forums.sohc4.net/index.php?topic=44885.0
i plan on a dual disc setup to go with it.

ROFL he got you!!!!

Industrial Cafe · « **Reply #6 on:** January 11, 2009, 02:05:54 PM »

hahahahaa! I know, right!

eldar · « **Reply #7 on:** January 13, 2009, 07:21:48 AM »

Hey he is partly right! Your tires DO stop you! I mean I have never driven on my rotors but I am pretty sure their stopping power would suck!

Aaron J Williams · « **Reply #8 on:** January 13, 2009, 09:15:59 AM »

Actually Eldy, the brake master cylinder stops you. Try stopping a car that doesn't have one and you'll see my point!

Steve F · « **Reply #9 on:** January 13, 2009, 09:50:15 AM »

What about Fred Flintstone.......he doesn't have rotors, master cylinder, rubber tires, yet he manages to stop somehow!

Artfrombama · « **Reply #10 on:** January 13, 2009, 10:11:33 AM »

Actually bigger brakes WILL stop you faster.

cafe750 · « **Reply #11 on:** January 13, 2009, 02:45:53 PM »

Quote from: Aaron J Williams on January 13, 2009, 09:15:59 AM

Actually Eldy, the brake master cylinder stops you. Try stopping a car that doesn't have one and you'll see my point!

Lets not leave out the hand, or foot...

eldar · « **Reply #12 on:** January 13, 2009, 02:53:04 PM »

Why not just use an anchor! I mean it works for ocean liners!

Markcb750 · « **Reply #13 on:** January 13, 2009, 03:01:11 PM »

Quote from: Artfrombama on January 13, 2009, 10:11:33 AM

Actually bigger brakes WILL stop you faster.

"Yes":

The additional weight generates a higher friction force at the wheel/road interface, you will stop in a shorter distance... but after you subtract the necessary absorption of additional rotary and linear momentum due to the increase in mass to my guess is less then 1/10 of 1% +/-

just saying

Artfrombama · « **Reply #14 on:** January 13, 2009, 03:25:30 PM »

Quote from: Markcb750 on January 13, 2009, 03:01:11 PM

Quote from: Artfrombama on January 13, 2009, 10:11:33 AM
Actually bigger brakes WILL stop you faster.

"Yes":

The additional weight generates a higher friction force at the wheel/road interface, you will stop in a shorter distance... but after you subtract the necessary absorption of additional rotary and linear momentum due to the increase in mass to my guess is less then 1/10 of 1% +/-

just saying

Er, ah.....OK

In my experience in a panic/threshold braking situation, larger brakes allow you to modulate the pedal to maintain braking control.

Markcb750 · « **Reply #15 on:** January 13, 2009, 04:19:26 PM »

Quote

In my experience in a panic/threshold braking situation, larger brakes allow you to modulate the pedal to maintain braking control.

Ah..adding another variable to the equation, an interesting and debatable point...but negating operator, I'll stick with my seat of the pants, napkin scribble, that ultimate stopping distance is limited by traction, at least with modern (or semi-modern as in the case of a 750 K series) brakes...

Industrial Cafe · « **Reply #16 on:** January 13, 2009, 05:25:27 PM »

Look at the big brain on Mark!

I just put my foot on top of the tire to stop, old school bmx style. wassat mean?

HavocTurbo · « **Reply #17 on:** January 13, 2009, 05:44:05 PM »

Quote from: Industrial Cafe on January 13, 2009, 05:25:27 PM

Look at the big brain on Mark!

I just put my foot on top of the tire to stop, old school bmx style. wassat mean?

That means you go through a lot of shoes my friend.

Artfrombama · « **Reply #18 on:** January 13, 2009, 06:20:40 PM »

Quote from: Markcb750 on January 13, 2009, 04:19:26 PM

Quote

In my experience in a panic/threshold braking situation, larger brakes allow you to modulate the pedal to maintain braking control.

Ah..adding another variable to the equation, an interesting and debatable point...but negating operator, I'll stick with my seat of the pants, napkin scribble, that ultimate stopping distance is limited by traction, at least with modern (or semi-modern as in the case of a 750 K series) brakes...

That's cool, we agree to disagree

Although I thought the subject was cars.

Industrial Cafe · « **Reply #19 on:** January 13, 2009, 07:18:25 PM »

my tires are made out of pie

Markcb750 · « **Reply #20 on:** January 13, 2009, 07:29:35 PM »

my tires have fixed relations with pi...

Industrial Cafe · « **Reply #21 on:** January 13, 2009, 08:42:58 PM »

I hope they don't have those relations in public

cafe750 · « **Reply #22 on:** January 13, 2009, 08:55:32 PM »

Quote from: Markcb750 on January 13, 2009, 07:29:35 PM

my tires have fixed relations with pi...

Mine really like Pecan pie...its really sticky, and helps me stop faster...

Markcb750 · « **Reply #23 on:** January 14, 2009, 04:24:03 AM »

The relationship between the circumference of my tires and the diameter of my tires is irrational. This is pi's fault.

Industrial Cafe · « **Reply #24 on:** January 14, 2009, 07:50:42 AM »

well sometimes the love between a circumference and a diameter is just that way.

and two-timing pi never accepts responsibility for anything.

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Author Topic: How brakes really work on your car. (Read 2753 times)

eldar

eldar

Markcb750

Markcb750

Markcb750

Markcb750