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g60 Brake Conversion

Question:	"Even though 4000 quattro brakes are perfectly fine for everyday usage, I want something marginally better. I have lots of money and time, how can I spend it?"
Answer:	"With a g60 brake conversion."

Level of Difficulty:

Advanced difficulty

Time:

Long, if you're clumsy

I have only fixed the spelling and grammar of this document. The validity and accuracy are questionable.

Date: Wed, 5 Nov 1997 23:24:28 -0700
From: Ben Howell
To: Todd Phenneger , John Karasaki
Subject: 4KCSQ G60 Conversion

I could have sworn that I posted this before, but I will again.......... Yes,
it CAN be done and pretty simply and with parts from your local junk yard.

A) the G60's will NOT bolt onto the 4k strut without a custom braket.

B) Get the following parts: A pair of G60 calipers (the dual piston calipers
that appeared on 5ktq, 200Q's etc....), get a pair of strut housing from a 1988
or 1989 80/90 (quattro or not, it doesn't really matter), get a pair of rotors
from a 1990 or 1991 20v 90Q (part # 893 615 301A dealer list AT
$155.60....also available from KVR in cross drilled form for $100/each KVR part
# AU-250) NOTE: DO NOT get the rotors from a 1989-1991 CQ, they are the right
size and bolt patteren, but they will NOT work. Also get some brake pads while
you are at it. (personally, I recommend Ferodo's for street use)

C) Swap the wheels bearing and hub (now is a good time to do new wheel bearings)
from your 4k into your newly acquired 80/90 struts. also swap your springs and
strut inserts onto the 80/90 housings.

D) Bolt it all to your 4kcsq!

NOTE #2: I do not recommend that you get strut housings form a later 80 or 90
(90, 91 or 92). They used the "cast" style a-arms and had completely different
set-ups for the sway bar. If you do get that strut housing, you will need the
entire front suspension (except the sub-frame). I have never used this style
suspension, so I can not add any more details than that.

Hope that helps! BTW, the G60's on the smaller cars is down right awesome!

Ben
Thornton, CO
'83 urQ #346 PT2B
'87 4KCSQ
'89 200Q 1.8bar "Programmed" ECU :)

And yet other posts on the subject:

Here are some thoughts on the G60 conversion from Todd Candey of Vortrag Motorsports.

Date: Thu, 11 Jun 1998 16:21:39 -0700
From: Todd Candey
Organization: Vortrag Motorsports

>
> I hear you have some brackets for G60 calipers to mount on 4k/C-GT strut
> housings? What can you tell me about them? Are they cast, machined,
> etc.? Cost?

I did have, and they were ok, but here's the run down...
They were a simple steel plate the was drilled and tapped for the g60
caliper and then cut and shaped to fit on the 4k strut housing. Problem is,
there isn't much room to get hardware in both the bolt locations for the
carrier and the upright. Turns out the most effective way to do that was to
weld the bracket to the upright. Kind of a problem considering that the
bracket is steel and the upright is cast iron.

After actually doing a few sets and running the cars at track events, I
found the performance of the g60 to be not _that_ much better than the
stock caliper. Yes, it did stop shorter. But, pedal travel is a touch
longer and the pedal feel is a little bit softer. Biggest dissapointment is
that they still fade just like the smaller g54. This I can only attribute
to the fact that the g60 is a big heavy piece of iron that can't disapate
heat.

I've instead decided to use some more effective solutions and am now
offering big brakes upgrades for all of the audi models. Kits range from
wilwood dynalites and 11" OE rotors for the 4k.cgt to Alcon 4pots on 14"
rotors for all audis. Also, we have Porsche big-reds on 13" rotors for all
of the models as a step down from the Alcon packages.

Sorry if I got carried away with the answer, nut thanks for asking about
the brackets.

Todd Candey

Date: Sat, 26 Aug 2000 02:25:02 -0700 (PDT)
From: Todd Phenneger 
Subject: Re: G60 Conversion on `89 90 Quattro

I might be wrong,  But I dont think you can.  I think only the 20v cars can accept 
the G-60 calipers.  Also, the Coupe's never had the G-60's to my Knowledge.  
They just accept them right.  ....Uhhh....Oops, the ur-q didnt' have them but I 
dont know about the CQ.   Maybe it did.  

  But, I think the 89 90q's had the same brakes as the 4kq with the smaller bolt 
spacing for Caliper Mounting.  So, if you want big brakes, I THINK you need either

And Adapter for the G-60's, CQ Struts,  5kt front struts from your parts car and 
willing ness to modify thier lower end or get ur-q ball joints.  (you can drill out to 
accept 90q Ball Joints).  

l8r

  TOdd

  jim green wrote: 
Here's the project. I need to replace my brake lines
vacuum booster, and front pads. I figure while I'm
tearing apart the brake system I might as well do a
G60 upgrade on the front. My question is does it
really matter if you get the calipers from a Coupe, or
a 5000 turbo? I'm planning to buy a 5000 for the
turbo conversion. The 20v.org site said there might
be some issues with the large and small piston
orientation (reversed). Also, I'm a little confused
on which rotors to use. They are supposed to be from
the 90 quattro 20v sport, part number 893 615 301. 
Has anyone done this, and am I on the right track?

Todd Phenneger
83' ur-q (awaiting a 20vt)
84' 4ktq fun but I'm sick of CIS.

From: JShadzi@aol.com
Date: Sat, 26 Aug 2000 12:06:07 EDT
Subject: Re: G60 Conversion on `89 90 Quattro

    G-60s do fit the 80/90Q, the two piece struts have the larger bolt 
spacing for the G-60, not as in the earlier 4kq single piece struts.  I think 
everything you need to know is on 20v.org, they even say which G60 you need 
to find and the correct part number for the rotors.  You will be adding 
approximately 7 lbs of unsprung weight to each wheel if you go to G60s.  I 
believe that asside from the weight increase, which is quite substantial, if 
is a good upgrade for 15" wheels.
Javad

Date: Sat, 26 Aug 2000 14:24:14 -0700 (PDT)
From: "Mark L. Chang"
Subject: Re: G60 Conversion on `89 90 Quattro

Jim/Todd:

You can use the G60s on the '89 90q. I helped a buddy do this to his '88
90q. You just need the carriers and the calipers from either a 5k or
CQ. (Todd, yes, the CQ had G60s standard.)

WRT to leading vs. trailing edge and smaller piston vs. bigger piston,
well, I dunno about that one.

On Sat, 26 Aug 2000, Todd Phenneger wrote:

> I might be wrong, But I dont think you can.  I think only the 20v cars
> can accept the G-60 calipers.  Also, the Coupe's never had the G-60's
> to my Knowledge.  They just accept them right.  ....Uhhh....Oops, the
> ur-q didnt' have them but I dont know about the CQ.  Maybe it did.
> 
>   But, I think the 89 90q's had the same brakes as the 4kq with the
> smaller bolt spacing for Caliper Mounting.  So, if you want big
> brakes, I THINK you need either
> 
> And Adapter for the G-60's, CQ Struts, 5kt front struts from your
> parts car and willing ness to modify thier lower end or get ur-q ball
> joints.  (you can drill out to accept 90q Ball Joints).

--
You are in a maze of little twisting passages, all different.
   - Zork I

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Page last updated: April 28, 2003