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Brake upgrade problem?

Posted: Mon Apr 18, 2005 11:13 pm
by matt
Hi guys new to this great forum an need help with a recent budget brake up grade i ve done. Background as follows: stock '83 gtv 2.0 with worn rotors needing attn, decided to base upgrade on gtv6 stock rotors and volvo girling 4 pot calipers.
So i got new brembo gtv6 vented rotors (I re drilled 4 stud pattern), new brake lines, 2 to 1 "T" and adapters and a pair of girling calipers off a volvo 244 wagon with vented discs.
Everything went well, bolted up fine until i fitted the pads, they sit 4 or 5mm above the disc. So my question is are the gtv6 and gtv 4 spindle the same or have i got my hands on the wrong type of girling caliper? The car brakes well but this can't be right can it? I weighed original vs new parts too wrote down somewhere for general info will post
Thanks MattImage
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This is what the end result i wanted (old forum S/A gtv6? with stock rotors?????)Image
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Posted: Mon Apr 18, 2005 11:28 pm
by Dennis
Hey Matt,

You need the discs from an ES30 (the SZ). These are 184mm x 24mm and will fit correctly with your girling calipers. Get ready, because those disks are expensive.........

Posted: Mon Apr 18, 2005 11:47 pm
by Jose_76
Those SZ discs are expensive, that's right, and have 5 stud holes on them. You can try cheaper 284x22mm ones with 4x98mm holes from an Alfa 145 or 146 2.0 Twin Spark. You would need to do some adaptation, just check it out this diagrams:

SZ discs:
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145/146 2.0 TS discs:
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Posted: Tue Apr 19, 2005 1:36 am
by matt
thanks guys
ok this will hurt....... how much is an SZ disc? I don't know if you can get the 145/146 discs in aus as that model was n't sold here (147 yes, same disc?) plus machining the disc centre to suit gtv hub bit too difficult for me
I m confused as i'm thought volvo girling caliper was bolt on upgrade for gtv6 with no disc mods

Posted: Tue Apr 19, 2005 2:01 am
by Jose_76
The 147 2.0 TS and 1.9 JTD front discs are also 284x22mm, but they have 5 stud holes. :(

Posted: Tue Apr 19, 2005 3:04 am
by enzo
on the brembo page you can search discs by dimensions...

Posted: Tue Apr 19, 2005 3:55 am
by Dennis
You have to consider the overall height. That's what makes it hard to fine the correct disc. The dimension of the SZ disc is 284x24x51,5. I had to use a 1mm spacer for the caliper to get the caliper to center on the disc, so have a look at discs with an overall height between 50,5mm and 52,5mm. Happy hunting!

Posted: Tue Apr 19, 2005 8:24 am
by Zamani
How tall is the hat of the 147 selespeed?