Rear quattro brake upgrade questions (slightly confused)
 

<center><img src="https://www.audiworld.com/tech/pix/brakefaq4.jpg"></center><p>
so I am debating on doing the rear brake upgrade conversion in the next couple of days. Been reading the FAQ, Tech and search and have some questions.

Seems like we can go two different ways:

S4 rears or A6/A4 rears... here is where it gets confusing. Don't have etka available until next week so there is no way to run numbers right now.

<b>S4 upgrade:</b>
a8 rear vented rotors
a8 rear caliper brackets
b5 s4 calipers

I do have the part numbers for the above but which A8 chassis are we talking about (year range)

<b>A4/A6 rear upgrade (the other one):</b>
modifieda4 posted that he used
B6 A4 rear caliper carriers
A6 3.0L rotors(<b> shoudlnt that be a4 3.0L</b>)

During the search I came up with posts that mentioned B6 a4 3.0L rotors

So which ones are correct?

Chris: If you are reading this and the above mentioning of the a4 b6 versus the a6 rear rotors your post in the faq could use some updating to reflect both options<ul><li><a href="https://forums.audiworld.com/a4/msgs/2097577.phtml">Phils rear break discussion thread</a></li></ul>

Yikes that was over 4 years ago wasn't it.

it shows that my search covered lots of stuff
 

I got part numbers for all the above so if it comes down to running numbers it can be done. But I'd rather check

iirc.
 

4B0-615-601-B rotors
8E0-615-425-A carriers

Correct , I have a word document that I copy the best info to. Here was my entry
 

Quattrofrog(Phil) came up with rear upgrade B6/A4 3.0 caliper carriers,rear
8E0-615-425-A
C5/A6 255MM x 10 mm solid rotors
4B0-615-601-B

I have almost every decent upgrade copy and pasted there . Its a just-in-case some of the info ever gets lost. I frequented some photography sites and one large site stopped hosting a lot of info 5-10 years ago . I wish I'd copied more . Most of what was there isn't anywhere else on the web. Hope it never happens here.

send me that b5 file if you would please

i may be willing to parce and database it. and if someone would host said db I'd be willing to
 

be the dba and perhaps build interfaces... just a thought as the current repository is kinda painful to use. Great tool and great idea but the size of the data has outgrown the usability of that format. Bottom line is we need a normalized relational database if we really want to be effective.

Also, please forgive the noob if this kinda talk is blasphemy...

I didnt know you are working with DB's
 

im struggling with my last college class right now: advanced database management.

anyways: i like the website idea

Kinda weaksauce to go from 245mm solid to 255mm vented... go big boy and get the 300mm...
 

Buy 034's brackets, rebuild a set of B5 S4 rear calipers, and get B7 S4 rear rotors...

Then you'll be ready for 332 or 355mm fronts :-)

Former Oracle now mostly MSSQL. I make no claims but think I could help out with a project like this
 

Also, may I ask what are you struggling with? Feel free to email me...

it will be good enough to hold the car inside the garage and provide
 

fun once there is ice and snow on the road so it can trade places with the moped.

I am not working with any specific database software or program
 

basically we are supposed to design and implement a database from the ground up, I am 6 chapters away from taking the final and still have to write up 3 documents.

We are using a book by Plew who teaches at Indiana Univ or something. The book is one of the worst books for this class. Everything is repetitive with the author and the it doesnt help that the class is online.

from a design, normalization, implementation, etc. standpoint i think I could help you a lot
 

but I can't stand having to adhere to silly books so maybe I might not be of help?

Why?
 

I track my car often and have stock setup.

works great

Agree. Very little gain from a rear brake upgrade.

not worth it...
 

spend the $$$ on the fronts...

unless you're getting a great deal on teh parts and/or you need to replace old stuff. don't bother.

that will be the deciding factor

I went ECS-tuning upgraded S4 rears and think they are well balanced with the Porsche fronts.
 

80% of those saying it's not worth it have no first hand knowledge because they haven't done it. The change from 245 X 10 to 308 X 22 in rears are noticeable.

Just curious, at what stage are people using variable brake bias proportioning valves???
 

They *are* pretty cheap.

a6 rears: 4B0 615 601 B (255x10 (1.5" offset))

S4 rears are balanced well and compliment Porsche fronts for later