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ke4pym
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join:2004-07-24
Charlotte, NC
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reply to Tig

Re: Stock vs Cross Drilled or Slotted Brake Rotors

said by Tig:

Slotting and drilling is all about shedding heat to avoid the fade and warping you mentioned.

Common misconception. Slotting/drilling isn't for cooling. It is to remove the gas buildup between the brake pad and the rotor. Thereby providing better grip between the two.

Here's a quick write up on it:
»www.brakeworld.com/slotted-rotors.asp


Juggernaut
Irreverent or irrelevant?
Premium
join:2006-09-05
Kelowna, BC
kudos:2

And, in the case of drilled rotors, it reduces unsprung weight.



Steve
I know your IP address
Consultant
join:2001-03-10
Yorba Linda, CA
kudos:5

said by Juggernaut:

And, in the case of drilled rotors, it reduces unsprung weight.

Isn't this just a couple of ounces? Is this difference even noticeable?


Juggernaut
Irreverent or irrelevant?
Premium
join:2006-09-05
Kelowna, BC
kudos:2

If I recall correctly, mild steel weighs .2833 pounds per cubic inch... so, depending on the drill pattern and size, it could reduce weight by a fair amount. When you apply that to the physics of the response time, it indeed makes a big difference.
--
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots." ~ Albert Einstein



Crash Gordon
Drive It Like You Stole It

join:2004-06-08
Smyrna, GA

1 edit
reply to Steve

said by Steve:

said by Juggernaut:

And, in the case of drilled rotors, it reduces unsprung weight.

Isn't this just a couple of ounces? Is this difference even noticeable?

In racing, every ounce makes a difference.
Save a couple ounces here, a few there, it'll add up.

Even if you add the same weight back with ballast, you can place that weight where you want.