Rear Disc Conversion

[opelman]

Hi,

I am running a GTE hatch thats only realy used on the track and I'm about to embark on the rear disc conversion using the Girling 38 calipers and Audi 80 245 discs, has anyone else done this conversion and were there any problems with brake bias and if so how was this overcome, cheers Jason

[monzta]

Hi,

I am running a GTE hatch thats only realy used on the track and I'm about to embark on the rear disc conversion using the Girling 38 calipers and Audi 80 245 discs, has anyone else done this conversion and were there any problems with brake bias and if so how was this overcome, cheers Jason

Hi Jason.

I have this on my A series project car as well. A very nice and easy mod.

First of all i would check out German parts trader EPYTEC.DE and purchase this set of adapters http://cgi.ebay.de/O...8#ht_3600wt_883

They are bolt on, and extremly easy to fit. They are made for VAG components so it is plug´n play. (Dont worry, they do speak English )

What i have discovered is that you need some sort of valve to shut off brake pressure to the rear end. Originally the front brakes get 33% each and the rear brakes share the remaining 33% (11,5% pr rear wheel). This is okay, but the vag disc brakes are alot better than the original drums, so you will have overbraking on the rear axle.

What you need is this item, it is easy to fit, and can be fitted in the cockpit if you wish (this give you the posibillity to adjust brake bias when driving, wich can be a advantage in a race), others has been seen mounted in the engine bay.

http://cgi.ebay.co.u...d5#ht_921wt_698

Hope this helps you out a bit

Edited May 30, 2011 by monzta

[opelman]

Hi Jason.

I have this on my A series project car as well. A very nice and easy mod.

First of all i would check out German parts trader EPYTEC.DE and purchase this set of adapters http://cgi.ebay.de/O...8#ht_3600wt_883

They are bolt on, and extremly easy to fit. They are made for VAG components so it is plug´n play. (Dont worry, they do speak English )

What i have discovered is that you need some sort of valve to shut off brake pressure to the rear end. Originally the front brakes get 33% each and the rear brakes share the remaining 33% (11,5% pr rear wheel). This is okay, but the vag disc brakes are alot better than the original drums, so you will have overbraking on the rear axle.

What you need is this item, it is easy to fit, and can be fitted in the cockpit if you wish (this give you the posibillity to adjust brake bias when driving, wich can be a advantage in a race), others has been seen mounted in the engine bay.

http://cgi.ebay.co.u...d5#ht_921wt_698

Hope this helps you out a bit

Hi Jason.

I have this on my A series project car as well. A very nice and easy mod.

First of all i would check out German parts trader EPYTEC.DE and purchase this set of adapters http://cgi.ebay.de/O...8#ht_3600wt_883

They are bolt on, and extremly easy to fit. They are made for VAG components so it is plug´n play. (Dont worry, they do speak English )

What i have discovered is that you need some sort of valve to shut off brake pressure to the rear end. Originally the front brakes get 33% each and the rear brakes share the remaining 33% (11,5% pr rear wheel). This is okay, but the vag disc brakes are alot better than the original drums, so you will have overbraking on the rear axle.

What you need is this item, it is easy to fit, and can be fitted in the cockpit if you wish (this give you the posibillity to adjust brake bias when driving, wich can be a advantage in a race), others has been seen mounted in the engine bay.

http://cgi.ebay.co.u...d5#ht_921wt_698

Hope this helps you out a bit

Many thanks for your reply,

Did you also have a centering ring made up for the disc and I was also wondering about the plumbing, does the line that originally went into the wheel cylinder screw straight into the caliper or does one need to have new brake lines made up ?

[monzta]

Many thanks for your reply,

Did you also have a centering ring made up for the disc and I was also wondering about the plumbing, does the line that originally went into the wheel cylinder screw straight into the caliper or does one need to have new brake lines made up ?

No prob

I don´t know if the plumbing is different on the VAG cars, my calipers is from a Corrado and theese needed to be changed, this was easy however as i just bought a set of brake line tools and accesories for 10£ and fitted a set of mounting screws that fit in the new caliper. Easy peasy

And yes i just bought a set of centering rings in plastic that make the discs fit at a rims&tyre shop no biggy.

Really it is a simple operation, and you won´t regret it. Only tricky bit is the handbrake cable, this wont fit, and i had to make a fusion between the original VW one and the one from my Manta. That wasn´t too hard either though.