Mark,

Did you ever get workable adaptors to complete the brake upgrade?

Paul

1980 Euro S Red/Blk Lea

 

If his indicated status is current, you may want to try calling him.

 

He did finish them up and would love to share the details.

 

Kibort! Kibort! Kibort! Kibort! Kibort! Kibort! Kibort!

 

The powers at be do not seem to be listening. I've tried.

 

MK does have this just about DONE....the 1st test car is Scotts gold racer...and the next will be mine......

 

Hey!!! whoever, get Mark back here interesting guy let go WT? Ray

 

we are very close .

the prototypes look great, but the final brackets are going on to see if all the demensions are correct.

we have the new Cayanne rotors and are ready to complete the installation.

Here we go, 13" rotors for the S brakes!

 

Do the new adapters work without grinding the caliper Mark? Will this combination fit underneath 17" Cup II's?

 

the new adapters, work without grinding on the main clamping portion. if you notice, even the stock rotors were rubbing slightly on the caliper. BUT, for sure , the ends need to be grinded, but the good news is, that portion of the calpers is ony a guide for the pad to fit in, not partof the clamping portion.

I dont know if 17" cup rims will work. I think it might. i think we have a set of 17s we could check out . they are BBS, but i bet the clearance might be similar.

worst case, when we got to the next laguna event, maybe we could pull a rim off Steves car, and check it out.

Mk

 

I need the centering rings! anyone got any ideas about how to get those made up?
i drilled the holes as precise as I could, they fit perfect, but the rotors wobble. no way that will work.
so, centering rings are the only way this is going to work!

 

what would be the dimensions of the centering ring for the 84US hubs working to center the Cayanne rotors?

can you make them for Scot??


thanks

Mk


[QUOTE=xschop;8256088]I'll be mocking up the Early 928 spindle/hubs next....944 prototype is done. The 928 may not need a rotated bracket at 104mm spreadwidth (I hope)
The 7mm thick centering rings are perfect.....0.000" runout
little revision, I'm making them 7.00mm thick, 84.95mm O.D, and 71.60mm I.D.

 

can anyone make these centering rings for me (scot)?????? I want to finish the project, but the centering issue is a BIG one. didnt think it would be that bad, if i could get the rotor attachment screw holes to line up. even with that done, they are not centered. the ring is the way to go.

we have a big Labor day SCCA race with the V8 supercar series in two weeks. can anyone give us a hand with making these centering rings???

the rings need to be 85mm OD , and thickness of about 7-7.25mm. i have to check the '84 spindle bearing diameter.

Thanks!!

Mark

 

Those ring dims I posted for the 944 Wilwood caliper/Cayenne rotor kit are SPOT-ON for the 928 hub as well. You have to start with a 3.5" diameter billet round and waste alot of the center. But once you've got a set, they are re-usable. Unless you have accurate mills, drilling the 136mm PCD set screw holes in the Cayenne rotors is very difficult.

I don't mind sharing my design/knowledge either. I made the revision to accomodate the fact that all rotor manufacturers do not machine the rotors to exacting tolerances, hence the 84.95mm dim. I have a second set of Slotted Cayenne rotors from the same manufacturer and machining and/or chroming was too tight for 85mm....That 0.0625 chamfer has to be there and has to face the 928 hub or it will not seat because of the hub curvature. Also to ensure the wheel face compresses the rotor face first, a 7.00mm thickness to the ring ensures this because the Cayenne rotors that Ive measured vary in thickness there as well....



And I have not abandoned the 928 Wilwood-Cayenne adapter kit either, just on the backburner. The CNC'd 944 Wilwood-Cayenne kit is complete and am doing the centering rings for them, then I'll be back on the 928 project....

 

cool! thanks Rob. Yes, i was unable to get the attachement holes to center the rotor. i thought if i could get them both to thread that the rotor would be centered. i guess 1-2mm off is a huge deal.

anyway, ill see if scot wants to buy a set from you to complete the project in time for Sears point Labor day race!