Urs4 2.2T litle project

[Dima ABY]

remember that you better not bolt the a8 brake booster flat to the 80's spacer.

Thats true!
Need some mods.And to drill two new holes.

[Majorcina]

I am not sure are you guys talking abouth C4 chassie or B3/4?

[Dima ABY]

Urs4/6 and s2 have same brake servo.

[Majorcina]

I think i read when rs200(forum member) writed that it bolts straith up?I dont think he mentioned drilling holes.But in other hand,i might be wrong(that wouldnt be the first time )

[Dima ABY]

Brake servo studs:

Hidraulic Urs4/6,s2 - O O



Vacuum a8,s8- O

O O

[Dima ABY]

Ahhh.
Wonder to show you the position by "O" marks but was imposible .

[Majorcina]

Well bouth the rears also from cayene turbo s
Will need Thomas's rear adapters also but this one's will need to wait some time to fit

not the best photos but you get the point

[ringbearer]

Great pic for those with the rare foot/caliper fetish

[macspring]

Can I ask what springs and shocks are on the silver UrS6 Avant ?

Also what springs are on your own UrS4 Avant ?

What size tyres are on both cars ?

Thanks for replies.


Avus rims and black coloured callipers.

[Majorcina]

Hahaha i just wanted to show how big they are hehehehe

Abouth silver audi,he has stock shocks,-40mm springs and 235/40r18 tyre
On mine are 2 way bilstein shocks, -50 front and -40 rear h&r springs with 225/40r18 tyre

[Majorcina]

Collecting parts for brake upgrade,till now bought
Front disc zimmerman 360x34
Read disc textar 330x22
Rear pads TRW
Ordered front pads brembo
Ordered Thuppu's front and rear adapters
Also buyed new battery,varta

[priba]

if we're talking about c4 vacuum booster ...

front two bolts holding a master cylinder are horizontal
............
..o.....o..
............

bolts holding a booster on the bracket form a square
..o.....o..
............
..o.....o..


comparing A/S8 booster, it has 2 bolts holding cylinder and booster onto the bracket
positioned like this
..o........
............
........o..

I've talked with rs200 some time ago about this and he told me too, no drilling required
not sure about hydraulic booster but the bracket should be same

I'll go to take booster from my scrap A8 today/tomorrow and make swap in a week so I'll let you know

[domas]

didn't read the whole story, but my point is that when doing vacuum booster conversion, change the whole kit, booster+master cylinder+fluid tank.

I have went with double chamber booster from A8, together with its cylinder and reservoir. There was a gasket that had to be fabricated behind it, but I am not sure which. It was not me who was doing the conversion. Keep in mind that I have done it on my 200 20v, which may be different from urs4

[Majorcina]

Priba,i will wait you to finish it and maybe next week i will start my brake upgrade

[priba]

here you go bro

some pictures from today's work
I forgot that I sell master cylinder few years ago
however, I found out it was A4/A6 m. cylinder since it had tank connections on top not at side, so I would have to buy a new one anyways

bracket




original vacuum brake booster




A8 vacuum booster




I've tried to place them in the position they should sit in the car
as you can see, only diagonal holes should be used to bolt the booster/cylinder
distance fits ... 102mm so does the hole
you can use original A8 bolts (don't forget to take them with you)






there is another issue
lenght of the shaft should be 230 mm for c4 and that you can't get without extending it with some kind of insert
as you see on the pic. I barely made it to 205mm with c4 fork on it







and what domas said, there might be a clearance issue between booster and the bracket
check the pic, see this "gold" bolt?
it is sticking out 2mm so bare in mind that booster won't sit on the bracket
it could get a bit shaky and you could get water inside your car
I'll grind them off and use some sealant over that white gasket





I had to stop for today 'cause of rain
more to come end of week