Dimpled/Drilled Rotors Difference??

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Dec 13, 2004 | 09:11 AM

Vettesic

Thread Starter

Drifting

Joined: May 2000

Posts: 1,478

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From: Long Island NY

Dimpled/Drilled Rotors Difference??

I am about to purchase a 4 set of Sportbrake Brembo, slotted/crossdrilled rotors at thier ebay store. $295.00 s&h included. I read that the more holes drilled the weaker it make the rotors. Would the dimpled version be a better choice? Here is the link.
http://cgi.ebay.com/ebaymotors/ws/eB...940919053&rd=1

Dec 13, 2004 | 10:45 AM

AU N EGL

Team Owner

Joined: Sep 2003

Posts: 43,084

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From: Raleigh / Rolesville NC

WOOOOOAAAHHHHHHH Big guy

did you read this:

Quote:

Rotors made in US/CANADA by BPC. Cross-drilled/slotted in USA

YOU ARE BIDDING ON 2 FRONT AND 2 REAR BRAND NEW BREMBO DRILLED/SLOTTED OE BRAKE ROTORS

1: the rotors are made by BPC which is Brake Parts Company. i.e. Raybestos NOT Brembo. BPC casts thier rotors in Canada and McHenery ILL. They may be repackaged as big red, but dont pay the big price.

2: When you go to the Brembo brake web pages you see Brembo makes drilled OR slotted, not the combination.

3: You can get Raybestos D/S rotors from NAPA $50 each. So that is $200 no shipping for the same rotors at NAPA or from rockauto.com for a bit less.

Overall D&S rotors are NOT for track use. Slotted are OK and so are dimpled. The slots or dimpels remove brake dust, but are still stress points which may start cracks.

Still the best rotor is the Raybestos rotor from NAPA $25 each no shipping or Rockauto.com about $22 each plus shipping.

Good Luck

Last edited by AU N EGL; Dec 13, 2004 at 11:35 AM.

Dec 13, 2004 | 11:43 AM

IFLUBYU

Drifting

Joined: May 2003

Posts: 1,715

Likes: 1

From: cAshburn VA

I have the slotted/dimpled set from these guys, great deal.

I went with the slotted/dimpled instead of the cross drilled as I want to auto-X or road race at some point. The drilled ones create weak points where the rotors can crack/break under severe de-acceleration. They seem to work ok for street use, but then again, one persons street driving... you get the point!

I put these on with a set of Hawk HPS (not the HPS plus just yet) and the set up works quite well.

Dec 13, 2004 | 11:49 AM

Vettesic

Thread Starter

Drifting

Joined: May 2000

Posts: 1,478

Likes: 38

From: Long Island NY

Quote:

Originally Posted by AU N EGL

They may be repackaged as big red, but dont pay the big price.

Gottcha.
Do you know if the Rays are zinc coated?

Dec 13, 2004 | 12:16 PM

AU N EGL

Team Owner

Joined: Sep 2003

Posts: 43,084

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From: Raleigh / Rolesville NC

I do not know if they come zinc coated or not. I do not think soo.

becarful with zinc coating as it MAY decrease stopping distances until the zinc is warn off. Rember to propely BED the rotors in too.

http://www.raybestos.com then go to rotors

http://www.napaonline.com

part numbers $26 each

86700 right f
86701 left f
86702 right r
86703 left r

d&s $61.50 each.
86700R right f
86701R left f
86702R right r
86703R left r

Dec 13, 2004 | 12:45 PM

Vettesic

Thread Starter

Drifting

Joined: May 2000

Posts: 1,478

Likes: 38

From: Long Island NY

Quote:

Originally Posted by AU N EGL

Rember to propely BED the rotors in too.

OK, here comes a jacka** question....What does that mean? And thanks for all of your good info!

Dec 13, 2004 | 12:56 PM

AU N EGL

Team Owner

Joined: Sep 2003

Posts: 43,084

Likes: 33

From: Raleigh / Rolesville NC

Bed the rotors or pads is necessary for properd brake function.

To "Bed" or 'season' the rotor is to transerfer some of the brake pad material to the rotor. This can only be accomplished with heat.

Process of 'bed" or 'seanson'

after putting on new pads or rotors, best not to do at same time

take car out to a nice quite straight road. ALL BRAKING MUST BE DONE IN A STRAIGHT LINE.

speed up to 40 mph then STOMP on the brakes. step on the brake peddle hard enough to ALMOST activate the ABS.

do these 40 to 5 mph stops 3 to 5 times

then do 80 to 5 mph stops the same way. 3 to 5 times

then drive around to 30 to 40 min to cool ther rotors and brake pads

put car away over for 24 hours ( not over night) to continue the cooling process.

The KEY factor is HEAT. So this process above should be done in a short period of time. ie. one right after the other.

Zinc coating MAY delay this process as it will need to be done after all the zinc is warn away.

This process is soo much fun I like doing it for the heck of it. It is like doing a 'stoppy" on a motorcycle - putting the nose on the ground and the rear wheels come ( almost in the vete ) come off the ground. Yes it also helps you learn hard controled braking as well.