xschop

Then they are locating bores.

To keep it simple make sure your adapter interface extends to the flat area and just bolt it down. Otherwise you need to CNC spuds into the adapter itself.

MarkRobinson

I had Brembo help design me a few sets of 355mm rotors using the StopTech rotors and billet hats for the 928 S4's + and 88S-89 951's.

Nice stuff: I have one set left: you use these with either stock S4 calipers or BigReds (either would be spaced with longer bolts & spacers). Notch the pads for full annulus coverage. I race on these, had them for a few years now, both street and track. $1400/set for my last pair, x-drilled stop-tech rings as-pictured.

xschop

Those look nice. I think I have put 6 different brakes swaps on 928s so far.

xschop

Kachunk, here's what I calculated. Round mm's to nearest tenth. Since the adapter will be 2" thick you could start with a 1x2 billet if 1.25" overhangs too far off the caliper base towards engine side. The center slots will clear the 951 spindles with ABS boss castings....

kachunk

Got it. I follow that math. I think that should work! You wouldn't happen to have spare machine time would ya?

xschop

I may have some time next week. I cleared my PM box. I guess my membership expired. Its hard for me to renew when my laptop has had to be cleaned 2x from rennlist malware

968perf

kachunk/xschop, anyone still sourcing these stoptech st-60 adapters? if I had a local machine shop make these is the drawing in xschop's post on 05-19-2015, 08:17 PM are what folks using to make these? On the rotor side, are the 911 355mm rotor ring/hat used off the shelf?

MarkRobinson, on another car planning to do your same setup, 928s4 calipers with stoptech rotors. have adapters to mount the radial calipers to a nonM030 968 but interested in where to source the stoptech rotor rings/hats. was hoping one of the 911 rotor rings/hats will work off the shelf.