4.2 rotor options

rhino4.2 · 10-08-2003, 09:09 AM

Last month I had a brake job done by a indie shop. They replaced all the pads and turned the rotors up front. it wasnt cheap. About a week ago my car developed a nasty vibration during braking. I'm assuming they may have turned them too far which ultimately led to warping (but i could be wrong). Either way, in light of what i just spent on the brake job, a Brembo big brake kit is out of the question for now, though I'll still probably end up having to replace the rotors (BTW, how big are they). So, what I am wondering is if anyone has replaced their 4.2s discs with a cross drilled or slotted peice, and if so what make and how much did they cost?

Muhammad · 10-08-2003, 09:18 AM

Link to AWE

screwynewy · 10-08-2003, 09:32 AM

GermanAutoParts.com for $270. If you don't care about the manufacturer I found some aftermarket rotors by NeoTech??? from BrakeWorld.com - Solid for $170, crossdrilled for $230. I didn't want to take a chance on the aftermarket so I went with the OEM.

rhino4.2 · 10-08-2003, 09:38 AM

Pardon my ignorance, but what is the significance of the HP-2 brakes and how do I know if my vehicle is eqquipped?

screwynewy · 10-08-2003, 09:49 AM

Lucas calipers with 4 pads per disc on the front. I think they are 322mm in diameter?

meq123 · 10-08-2003, 10:06 AM

The above is a picture of my HP-2 calipers (before I painted them red!) from the tech section writeup I did on changing the pads. Note: this is incredibly easy on the HP-2's - much easier than other Audi brake systems (see URL below).

HP-2's are 4 pad, 2 piston calipers, with 12.6 in. (321 mm) ventilated disc rotors, supplied on the Audi "performance" models - S4, S6, A6 2.7t, (for a while) A6 4.2 etc.

The Audi HP-2 rotors have a reputation and tendency to warp (many have had theirs replaced many times) which is a good reason to go with aftermarket ones after your warranty is up.

The Audi pads are tremendously expensive and very "dusty" which is a good reason to go with aftermarket ones. I recommend Mintex Redbox (approx $80-$90 for a set), others have liked other aftermarket brands too (do a search).

http://www.audiworld.com/tech/wheel24.shtml

fl2.7T · 10-08-2003, 11:31 AM

JAA 4.2 · 10-08-2003, 12:09 PM

Get a die grinder with a metal polishing wheel and surface the disks. What you are looking for is the kind that resembles a bunch of little strings all jumbled together with some glue on them. I don't know a better way to describe it. It will knock off the uneven layer of pad depsosit, but not scratch the disk. Make sure you wear a dust mask, or get good at holding your breath. After this, drive the next three hundred miles of stop and go driving easy. Should solve your problem.

Stoney · 10-09-2003, 01:02 AM

http://sonolithics.com/files/a6_links.html#brakes

2.7t john · 10-09-2003, 09:53 AM

10-08-2003, 09:09 AM	#1
rhino4.2 New Member Account #: 58793 Join Date: Jul 2003 Posts: 27	4.2 rotor options Last month I had a brake job done by a indie shop. They replaced all the pads and turned the rotors up front. it wasnt cheap. About a week ago my car developed a nasty vibration during braking. I'm assuming they may have turned them too far which ultimately led to warping (but i could be wrong). Either way, in light of what i just spent on the brake job, a Brembo big brake kit is out of the question for now, though I'll still probably end up having to replace the rotors (BTW, how big are they). So, what I am wondering is if anyone has replaced their 4.2s discs with a cross drilled or slotted peice, and if so what make and how much did they cost?

10-08-2003, 09:18 AM	#2
Muhammad AudiWorld Super User Account #: 153 Join Date: Mar 2000 Posts: 7,472	DBA discs seem to be the best bet. $320/set from AWE Link to AWE __________________ Muhammad '06 A4 3.2Q Brilliant Black/Ebony Premium, Sunroof, Shades, Sport

10-08-2003, 09:32 AM	#3
screwynewy Junior Member Account #: 11499 Join Date: Oct 2000 Posts: 784	For my '00 4.2 I just bought a pair of OEM front rotors from....... GermanAutoParts.com for $270. If you don't care about the manufacturer I found some aftermarket rotors by NeoTech??? from BrakeWorld.com - Solid for $170, crossdrilled for $230. I didn't want to take a chance on the aftermarket so I went with the OEM. __________________ (Sold) 2000 A6 4.2 - Upgrades: H-Sport Sways, GIAC TIP Chip, MagnaFlow SS exhaust w/ 3.5" tips, OEM sport suspension upgrade, 18" RS4 wheels w/ 255/35/18 Pirelli Pzero Nero's, M5 spoiler lip, Audi Sport badge. Previous Cars: 97 BMW M3 98 A4 qms 98, 91, & 89 Acura Legend 00 Toyota Tundra P/U 91 Infiniti Q45 85, 89, 96, 98 Honda Accords 89 & 92 Taurus SHO 92 Mazda MX6 88 Volvo 240 Wagon 77 Monte Carlo (first car)

10-08-2003, 09:38 AM	#4
rhino4.2 New Member Account #: 58793 Join Date: Jul 2003 Posts: 27	HP-2? Pardon my ignorance, but what is the significance of the HP-2 brakes and how do I know if my vehicle is eqquipped?

10-08-2003, 09:49 AM	#5
screwynewy Junior Member Account #: 11499 Join Date: Oct 2000 Posts: 784	Not sure about the HP-2 designation but I know that my car has the ........ Lucas calipers with 4 pads per disc on the front. I think they are 322mm in diameter? __________________ (Sold) 2000 A6 4.2 - Upgrades: H-Sport Sways, GIAC TIP Chip, MagnaFlow SS exhaust w/ 3.5" tips, OEM sport suspension upgrade, 18" RS4 wheels w/ 255/35/18 Pirelli Pzero Nero's, M5 spoiler lip, Audi Sport badge. Previous Cars: 97 BMW M3 98 A4 qms 98, 91, & 89 Acura Legend 00 Toyota Tundra P/U 91 Infiniti Q45 85, 89, 96, 98 Honda Accords 89 & 92 Taurus SHO 92 Mazda MX6 88 Volvo 240 Wagon 77 Monte Carlo (first car)

10-08-2003, 10:06 AM	#6
meq123 AudiWorld Senior Member Account #: 47880 Join Date: Dec 2002 Posts: 1,352	HP-2 info (all HP-2 Audi owners need to know this) The above is a picture of my HP-2 calipers (before I painted them red!) from the tech section writeup I did on changing the pads. Note: this is incredibly easy on the HP-2's - much easier than other Audi brake systems (see URL below). HP-2's are 4 pad, 2 piston calipers, with 12.6 in. (321 mm) ventilated disc rotors, supplied on the Audi "performance" models - S4, S6, A6 2.7t, (for a while) A6 4.2 etc. The Audi HP-2 rotors have a reputation and tendency to warp (many have had theirs replaced many times) which is a good reason to go with aftermarket ones after your warranty is up. The Audi pads are tremendously expensive and very "dusty" which is a good reason to go with aftermarket ones. I recommend Mintex Redbox (approx $80-$90 for a set), others have liked other aftermarket brands too (do a search). http://www.audiworld.com/tech/wheel24.shtml __________________ Somewhere in Maryland: 2001 A6 2.7t 6spd - now sold :-(

10-08-2003, 11:31 AM	#7
fl2.7T Junior Member Account #: 33138 Join Date: Feb 2002 Posts: 1,130	Best bet in what respect. Longevity, less prone to warpage, both ?

10-08-2003, 12:09 PM	#8
JAA 4.2 Junior Member Account #: 55990 Join Date: May 2003 Posts: 1,018	you have pad deposits... Get a die grinder with a metal polishing wheel and surface the disks. What you are looking for is the kind that resembles a bunch of little strings all jumbled together with some glue on them. I don't know a better way to describe it. It will knock off the uneven layer of pad depsosit, but not scratch the disk. Make sure you wear a dust mask, or get good at holding your breath. After this, drive the next three hundred miles of stop and go driving easy. Should solve your problem.

10-09-2003, 01:02 AM	#9
Stoney AudiWorld Super User Account #: 230 Join Date: Mar 2000 Posts: 5,270	Read these messages.... http://sonolithics.com/files/a6_links.html#brakes __________________ A6 (C5 platform) FAQ Stoney's Picture Library Email: jds@sonolithics.RemoveThisPart.com 2001 A6 4.2L, Sport, Premium, Nemo Blue, Melange Interior

10-09-2003, 09:53 AM	#10
2.7t john New Member Account #: 15640 Join Date: Feb 2001 Posts: 401	DBA = excellent oem replacements........ that is all __________________ ---2000 A6 2.7T racing green 6-speed awe- dts apr snubmount apr chipped forge diverter valves uuc short shifter, RS4 shift knob RS4 pre-cat gutted downpipes Supersprint cat/back exhaust thru valance S4 wheel well liner vents darintake/Z-flow -airbox mod ITG air filter DBA long life gold front rotors porterfield R4S brake pads s.s. brake lines eibach pro-kit springs/sport shocks Oettinger 18" RE's, Falken ST-115 235-40-18 H sport sway bars

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