ToniH

I am trying to source the caliper to spindle adapters for Brembo 6 piston calipers (to '91 C4). After searching the net I am starting to think they cannot be bought separately. The BBK vendors only offer them in their kits.

So, I need to get them done by a machine shop. Before I start to adapt them to my car and do plywood mock up I thought I ask here if somebody had already done this and made a drawing or maybe even a cad design of the adapters? I would really appreciate any data as it would save a lots of time.

Thank you.

Jussi

Don't install those cayenne calipers....they are utterly worthless...


Give them to ME!

ToniH

Thanks Jussi for your understanding and support.

I do have these little used very nice original base clawtype superformance -calipers I could sell you... I throw in some caliper paint...

kowalski340

ToniH

Thanks, I see he also sells Brembo so he might indeed have something suitable. I'll ask him.

0Vector Vette

Did you already buy the Brembo calipers. If not, I have a AP Racing 6 piston setup for C4 Corvette, including the adapters.

ToniH

Thanks, I do already have the Brembos.

I currently have the C5 brakes in my car but stumbled on the set of Brembos I could not pass.

For comparison, C4 stock, Brembo 4 piston, Brembo 6 piston:


Weight:
- C4 stock without pads 3.75 lbs (1.7kg)
- Brembo 4 pot with pads: 7.7 lbs (3.5kg)
- Brembo 6 pot with pads: 14.10 lbs (6.4kg)

Sidney004

When you get the adapter bracket, please post the source on the forum. Are the mounting holes and dimensions common on all the Brembo's?

ToniH

Yes, I will. Zero answers yet from any of the vendors I emailed to.

No, they are not all same. There is even some variation within 6 pot styles. Not all calipers can be installed to C4 without cutting the spindle. The ones used for example in Porsche Cayenne Turbo S should be a no cut solution to C4's according to one industry source.

Here is a size comparison between Cayenne and 996GT2 (red) calipers:


Cayenne caliber is a bit bigger (more mass), takes 350mmx34mm rotors (probably even larger in diameter can be used, if adapters are matched).

abc 123

Definitely give www.pnwzr1.com a shout. He has done some trick stuff.

ToniH

Yeah, I did - 2 days ago.

ibjamin

The Cayanne calipers are very nice and big but I haven't seen much of a pad selection for them. I think I saw a Pagid Yellow was about it. ECS tuning uses them for their VW and Audi kits.

George

ToniH

OK, I got a reply from Jeff at pnwzr1.com. He is very helpfull and would be willing to fabricate the adapters. But that would obviously be possible only with the calipers at hand which is not really an option as I live in Europe.

So, I am basically interested if there are any existing adapters available before I get them made locally.

ToniH

I guess I need only 1 set and some of these companies who make pads for Cayanne must have something usable: ECB has redstuff and yellowstuff for Cayanne, Centric, Hawk, Ferodo and Axxis also make pads for it. Must be more available but this from google quickly.

Anyway, Cayanne is a 5000 lbs beast which is quite fast even on track so I think its brakes can also stop my tiny Vette even with less than best pads