Those Brembos, fixed caliper? Or not? [Patent inside!] - Page 6 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Marrk · 10-17-2011, 08:08 PM

Quote:

Originally Posted by Type[R]+

well then mr brake expert, answer my question about supercars using drilled rotors over plain or slotted....

They could use anything they like....

Jeez, Louise. He's saying that it is a con, a bit of fluff to sell to suckers who don't know any better.

Hard to believe that you can still con people with such an "old news" item, but maybe you still can.

LionZoo · 10-17-2011, 08:13 PM

Quote:

Originally Posted by Type[R]+

well then mr brake expert, answer my question about supercars using drilled rotors over plain or slotted....

They could use anything they like....

Marketing. Why do Ferraris have the LED strip on the 458s? it's not because the LEDs help light the road better. It's because in the end, image sells. Especially for supercars as most people buy Ferraris for cruising down Sunset.

Type[R]+ · 10-17-2011, 08:53 PM

Quote:

Originally Posted by LionZoo

Marketing. Why do Ferraris have the LED strip on the 458s? it's not because the LEDs help light the road better. It's because in the end, image sells. Especially for supercars as most people buy Ferraris for cruising down Sunset.

Safety.

Dimman · 10-17-2011, 08:56 PM

Doesn't the 'racy' image of drilled brakes go back to the days when the old pad compounds (ie not used anymore) on race-cars would create a lot gases when hot?

Type[R]+ · 10-17-2011, 08:56 PM

Quote:

Originally Posted by Marrk

Jeez, Louise. He's saying that it is a con, a bit of fluff to sell to suckers who don't know any better.

Hard to believe that you can still con people with such an "old news" item, but maybe you still can.

Yeah, because supercars jeopardise saftey and braking performance for cool looks.

chulooz · 10-17-2011, 09:29 PM

street cars/

Matador · 10-17-2011, 09:43 PM

Quote:

Originally Posted by Dave-ROR

Carbon brakes see some race car use, but it's limited due to the insanely expensive costs associated with them. Even Porsche themselves don't want to pay the price of admission on that one.

Cost limitation yes, but not by the racers. Many racing series prohibit the use of carbon brakes.

Marrk · 10-17-2011, 09:52 PM

Quote:

Originally Posted by Type[R]+

Yeah, because supercars jeopardise saftey and braking performance for cool looks.

Sorry I bothered.

Good luck.

CyberFormula · 10-17-2011, 10:08 PM

I already said I vote for blanks...

but the new question is....

Why do Motor bikes have Drilled.

LionZoo · 10-17-2011, 10:36 PM

Quote:

Originally Posted by CyberFormula

I already said I vote for blanks...

but the new question is....

Why do Motor bikes have Drilled.

Bikes are extremely light and are generally equipped with about three rotors. Therefore, the rotors don't need nearly as much heat capacity as cars and generally won't get as hot. However, what the bikes do need is a rotor with a large enough diameter to provide the needed braking force. As the rotor outer diameter gets larger, the force exerted also gets larger. (For a demonstration of this concept, spin a CD and try to stop it by putting a finger near the center of the CD. Then do it again, but this time put your finger at the very outer edge of the CD. You should notice a dramatic difference in the force needed to stop the CD.)

Therefore, the bikes want a large outer diameter, but since they're so light, they don't need the thermal capacity that comes from a full solid hunk of metal. Thus, here drilling for weight savings is more acceptable.

Also, note that bike rotors are not vented. Since there are no internal vanes, that means that the percentage weight savings gain from drilling is increased. Bikes rotors generally have a much larger portion of their rotors drilled out than car rotors.

Finally, when the stresses get really high, bikes revert back to solid rotors. See e.g. MotoGP rotors.

Dave-ROR · 10-17-2011, 10:39 PM

Quote:

Originally Posted by MatadorRacing_F1

Cost limitation yes, but not by the racers. Many racing series prohibit the use of carbon brakes.

Thanks for the info. I really have no idea on who allows (or doesn't allow) carbon brakes. I know I'll never dump 5 figures on replacement pads and rotors so I'll never have to worry about it :P

Dave-ROR · 10-17-2011, 10:41 PM

Quote:

Originally Posted by Marrk

Sorry I bothered.

Good luck.

I've given up. He can believe whatever he wants. Everyone else who wondered why they used blanks understand the reasons now I believe. That whole "you can lead a horse to water..." thing holds true.

Cyber: Lion answered that correctly

LionZoo · 10-17-2011, 10:41 PM

Disclaimer: My explanations are simplified, so for the other engineers out there, yes I know I sometimes leave out details. However, I feel smaller details are beyond the scope of the message board environment.

NESW20 · 10-17-2011, 11:30 PM

stupid troll is stupid. is there some way i can block his posts from ever showing up?

10-17-2011, 10:08 PM	#79
CyberFormula Senior Member Join Date: Dec 2009 Drives: gti, nsx, integra type r,porsche911 Location: garage Posts: 536 Thanks: 1 Thanked 17 Times in 15 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I already said I vote for blanks... but the new question is.... Why do Motor bikes have Drilled. __________________

10-17-2011, 11:30 PM	#84
NESW20 2.1L 3SGTE Join Date: Oct 2009 Drives: MR2 Turbo & Tacoma Location: Columbus, IN Posts: 1,248 Thanks: 29 Thanked 24 Times in 22 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	stupid troll is stupid. is there some way i can block his posts from ever showing up? __________________ 1991 MR2 Turbo - 2.1L high compression stroker 3SGTE 2006 Tacoma 4x4 TRD Off Road - All-Pro front bumper, Old Man Emu shocks, Old Man Emu HD front coils, All-Pro leafs 1990 240SX Coupe - sold 2008 Civic Si Sedan

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10-17-2011, 09:29 PM	#76
chulooz Registered you sir Join Date: Feb 2010 Drives: 99 impreza coupe Location: DC / CT Posts: 1,666 Thanks: 259 Thanked 380 Times in 207 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	street cars/

10-17-2011, 10:41 PM	#83
LionZoo Member Join Date: May 2011 Drives: 2006 Mazda RX-8 Location: Los Angeles, CA Posts: 63 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Disclaimer: My explanations are simplified, so for the other engineers out there, yes I know I sometimes leave out details. However, I feel smaller details are beyond the scope of the message board environment.

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