More machining fun
Rear brakes needed some changes to accommodate the 5×114 change as well. First, new hat was obviously needed with the new lug pattern. V8Roadster’s front hats for their NC floating BBKs had the bolt pattern I needed, and after much comparing of measurements, the other dimensions were close enough that they’d work on the car with some adjustments to surrounding bits.
Bonus is these are designed to use the same StopTech 8mm floating hardware as the new front brakes, so same hardware all around.
The 5 lug hats have a slightly different offset than the previous NA/NB sport rotor hats, so I made a correction to the brackets to account for that:
The 5 lug hats are also slightly larger in total diameter than 4×100 hats, which caused an interference with the caliper. So rotor friction ring ID and OD were increased slightly to get the clearance needed. Then I fired up the lathe for my first real project with that machine and made small radial spacers to move the caliper for the larger diameter. The finish on them could be better, learning as I go, but paired with longer bolts they’ll work perfectly:
Finally, the 5 lug hats have a center register hole for an NC hub, but my rear 5 lug Miatahubs were made with a center to match NA/NB specs. So project #2 with the lathe was a set of hubcentric adapter rings for the rear rotors.
Started with this:
Progress shot, this is after all the forming operations, just starting to part off the individual pieces:
And individual rings finished and back from anodizing. Two for the car, one for the spares box:
Centering ring mounted up with the new rotor on the 5 lug Miatahub, carnage in the background…
