z20 soarer brake upgrade qn (fitting jza80 disks)

[CrUZida]

There is a pad from another caliper I've heard fits better, covers more of the discs.

Maserati, or Aston Martin, can't remember though.

[Looonie]

The problem is that the R32 GTS-t/Z32 4 pot Sumitomo caliper is designed for a 280mm-297mm brake rotor. The design is such that to correctly place this size rotor full depth inside the centre of the caliper, the leading and trailing edges sit just above the edge of the rotor.

So when you go to a bigger diameter rotor, the curvature of the rotor prevents it seating completely within the caliper.

I can't think of the completely proper technical terms right now...

Basically, it works good as a cheap upgrade to stocker setup, and while it doesn't "look right" it works and works pretty good. Next step up is to use a completely different caliper designed for the larger disc, with appropriate mounting brackets to properly place it over a specific size rotor.

[Looonie]

Oh and CrUZida... I want to see your MA70 build thread!!! But I'm not a paying member (in NZ, so no point)...

[CrUZida]

The problem is that the R32 GTS-t/Z32 4 pot Sumitomo caliper is designed for a 280mm-297mm brake rotor. The design is such that to correctly place this size rotor full depth inside the centre of the caliper, the leading and trailing edges sit just above the edge of the rotor.

So when you go to a bigger diameter rotor, the curvature of the rotor prevents it seating completely within the caliper.

It is possible to have the pad fully mate with the disc, but I think the a70/z20 hub is preventing this. Its either that or a poor design on Nightpagers behalf.

I'm running R32 calipers and 324mm GTR discs on my Z10, and my pads do not overhang the disc at all.

[The Real Roadrunner]

i think its a combo of both the hub and the "kit", ive got some of the nightpager brackets here and as soon as i get a hub/upright ill be fitting them to see if it can be improved.