DBA 2-piece + Carbotech pads, but problem

mwhit02 · 06-13-2014, 10:34 AM

Last night I installed the DBA-5000 series front rotors and Carbotech 1521's. When I got home and looked at the rotor, it looked like the pad was not making full contact with the whole surface of the rotor. Should it be, or is this normal?

DEpointfive0 · 06-13-2014, 10:39 AM

Normal. Be ready for a ring if rust in the no contact area. Try Z1's next time.

/thread

mwhit02 · 06-16-2014, 12:51 PM

and here's how they look about 1 week after being installed. I wish someone would have said this is what to expect:

mwhit02 · 06-16-2014, 12:52 PM

very disappointed...I was under the impression DBA made some of the best brake rotors on the market.

DavidZ370 · 06-16-2014, 02:06 PM

Just by the tiny slots you can tell they're not so great

Rusty · 06-16-2014, 05:31 PM

What's wrong with them?

BGTV8 · 06-16-2014, 06:26 PM

I agree, what is wrong ??

Zauskycop · 06-17-2014, 12:38 PM

Please, enlighten us on this fine observation and engineering knowhow!!!

Tracy Ramsey

Quote:

Originally Posted by DavidZ370

Just by the tiny slots you can tell they're not so great

mwhit02 · 06-17-2014, 03:46 PM

I just wanna know why these rotors arent cut down more where the pads don't make contact or at the least zinc coated

DavidZ370 · 06-17-2014, 05:44 PM

Quote:

Originally Posted by Zauskycop

Please, enlighten us on this fine observation and engineering knowhow!!!

Tracy Ramsey

Sorry, there is no engineering to it at all. Personally i have never seen slots that small on a rotors ever, so just from the looks of the DBAs it looked sorta fishy ya know.

Zauskycop · 06-17-2014, 05:51 PM

it isn't the fault of the rotors that the pads aren't big enough to cover the entire rotor, and I suspect that these rotors are appropriate for more that just the Z. The pad contact area appears to me to be very similar, if not the same, as the stock rotor contact area.

Tracy Ramsey

Quote:

Originally Posted by mwhit02

I just wanna know why these rotors arent cut down more where the pads don't make contact or at the least zinc coated

BGTV8 · 06-17-2014, 06:02 PM

I use these rotors on an 1100kg 540 hp modified production sports car and they work just fine. Rotors are cold-fired before use and I get a full season out of each set which is less than half the price of AP Racing rotors.

If you are concerned at the aesthetics then learn to live with it, or go back to OEM rotors.

The slots are engineered to provide the minimum space for gases released from the pads during hi-speed stops

In terms of rotor ring design, DBA makes a number of rings from one source casting and these rings are then machined for 332 OD all the way up to 356mm OD.

These rings need to accommodate centre bores from 190 to 200mm and most of these sizes have a common rotor mount PCD of 215.9mm and need to accomodate both 10 and 12 bolt mountings.

The inner face ID varies between 225mm to 231 mm

A common base ring reduces the cost for a number of fitments.

I can tell you that one design objective was to provide the minimum material removal to provide sufficient slot-space to accommodate gas released during repeated high speed stops when rotor temps are likely to reach 900 DegC.

As for a comment about zinc-plating to avoid rust in an earlier thread .... pulleeeez .... zinc coating has absolutely no role in this place

It has all been designed ... if you don't care for the aesthetic, choose another product, but these rotors "work".

DEpointfive0 · 06-17-2014, 10:03 PM

You must work for DBA

Quote:

Originally Posted by BGTV8

I use these rotors on an 1100kg 540 hp modified production sports car and they work just fine. Rotors are cold-fired before use and I get a full season out of each set which is less than half the price of AP Racing rotors.

If you are concerned at the aesthetics then learn to live with it, or go back to OEM rotors.

The slots are engineered to provide the minimum space for gases released from the pads during hi-speed stops
This is old, outdated info. Only crap, REALLY crap pads need slots

In terms of rotor ring design, DBA makes a number of rings from one source casting and these rings are then machined for 332 OD all the way up to 356mm OD.

These rings need to accommodate centre bores from 190 to 200mm and most of these sizes have a common rotor mount PCD of 215.9mm and need to accomodate both 10 and 12 bolt mountings.

The inner face ID varies between 225mm to 231 mm

A common base ring reduces the cost for a number of fitments.
100% correct; DBA did this to limit their internal SKUs to increase profit. By any chance, did you or the OP weigh them before installing them?

I can tell you that one design objective was to provide the minimum material removal to provide sufficient slot-space to accommodate gas released during repeated high speed stops when rotor temps are likely to reach 900 DegC.

As for a comment about zinc-plating to avoid rust in an earlier thread .... pulleeeez .... zinc coating has absolutely no role in this place

It has all been designed ... if you don't care for the aesthetic, choose another product, but these rotors "work".

BGTV8 · 06-17-2014, 10:11 PM

Quote:

Originally Posted by DEpointfive0

You must work for DBA

Nope ... no affiliation ..... just lots of experience going back 20+ years

As for slots no longer being necessary and/or only required with really really crap pads, lets just agree to differ

bleunetizen · 06-18-2014, 01:13 AM

wonder if there's an option to use taller pads?

06-13-2014, 10:34 AM	#1 (permalink)
mwhit02 Enthusiast Member Join Date: Sep 2012 Location: St. Louis Posts: 358 Drives: '15 Audi Allroad Rep Power: 13	DBA 2-piece + Carbotech pads, but problem Last night I installed the DBA-5000 series front rotors and Carbotech 1521's. When I got home and looked at the rotor, it looked like the pad was not making full contact with the whole surface of the rotor. Should it be, or is this normal?

06-13-2014, 10:39 AM	#2 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	Normal. Be ready for a ring if rust in the no contact area. Try Z1's next time. /thread fuct likes this. __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

06-16-2014, 05:31 PM	#6 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,185 Drives: 2011 Nismo GM 6M Rep Power: 2684437	What's wrong with them? __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

06-17-2014, 06:02 PM	#12 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,514 Drives: 09 Nissan 370Z M6 Rep Power: 39973	I use these rotors on an 1100kg 540 hp modified production sports car and they work just fine. Rotors are cold-fired before use and I get a full season out of each set which is less than half the price of AP Racing rotors. If you are concerned at the aesthetics then learn to live with it, or go back to OEM rotors. The slots are engineered to provide the minimum space for gases released from the pads during hi-speed stops In terms of rotor ring design, DBA makes a number of rings from one source casting and these rings are then machined for 332 OD all the way up to 356mm OD. These rings need to accommodate centre bores from 190 to 200mm and most of these sizes have a common rotor mount PCD of 215.9mm and need to accomodate both 10 and 12 bolt mountings. The inner face ID varies between 225mm to 231 mm A common base ring reduces the cost for a number of fitments. I can tell you that one design objective was to provide the minimum material removal to provide sufficient slot-space to accommodate gas released during repeated high speed stops when rotor temps are likely to reach 900 DegC. As for a comment about zinc-plating to avoid rust in an earlier thread .... pulleeeez .... zinc coating has absolutely no role in this place It has all been designed ... if you don't care for the aesthetic, choose another product, but these rotors "work". PEPI likes this.

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06-16-2014, 12:51 PM	#3 (permalink)
mwhit02 Enthusiast Member Join Date: Sep 2012 Location: St. Louis Posts: 358 Drives: '15 Audi Allroad Rep Power: 13	and here's how they look about 1 week after being installed. I wish someone would have said this is what to expect:

06-16-2014, 12:52 PM	#4 (permalink)
mwhit02 Enthusiast Member Join Date: Sep 2012 Location: St. Louis Posts: 358 Drives: '15 Audi Allroad Rep Power: 13	very disappointed...I was under the impression DBA made some of the best brake rotors on the market.

06-16-2014, 02:06 PM	#5 (permalink)
DavidZ370 A True Z Fanatic Join Date: Oct 2013 Location: [= Posts: 1,065 Drives: 17' CWP STI Rep Power: 23	Just by the tiny slots you can tell they're not so great

06-16-2014, 06:26 PM	#7 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,514 Drives: 09 Nissan 370Z M6 Rep Power: 39973	I agree, what is wrong ??

06-17-2014, 03:46 PM	#9 (permalink)
mwhit02 Enthusiast Member Join Date: Sep 2012 Location: St. Louis Posts: 358 Drives: '15 Audi Allroad Rep Power: 13	I just wanna know why these rotors arent cut down more where the pads don't make contact or at the least zinc coated

06-18-2014, 01:13 AM	#15 (permalink)
bleunetizen Base Member Join Date: Jan 2014 Location: NZ Posts: 138 Drives: BMW M6, 530i, 370z Rep Power: 11	wonder if there's an option to use taller pads?