And tonight I measured the Mitsi brake calipers that I scored for ultra cheap a while back.
https://twitter.com/FredCookeNZ/status/ ... 5953029121
https://twitter.com/FredCookeNZ/status/ ... 5948028928
I put a couple of squares across the curved outer parts such that they intersected with each other and the distance from the outer curve to the intersection point was 168mm. Thus the minimum inner diameter under which they can fit with the correct sized rotor is 336mm, or 13.228 inches.
The thickness of that outer piece is about 25mm, and a further 4mm to the edge of the pad, which we'll split in 2 for clearance, and call 27mm, implying a correct rotor diameter of 282mm. Obviously it'd be OK to go a bit bigger or a bit smaller than these figures, and my measurements could be a little out anyway, but looking at the wheels I have on hand:
https://twitter.com/FredCookeNZ/status/ ... 7748806656
This implies optimally using a 15 inch wheel on the car, but possibly using a 14" wheel on the car. Many claim 14 is the better looking choice. I've not really decided yet, we'll see what happens.
I'd probably be happy with a 22x260 rotor, or similar to that, which could bring the wheel inner diameter requirement down to 314mm or 12.362 inches. There was a kit on trademe around that size IIRC. It's not on there now, but they relist periodically so I will edit here when I next see it. You could almost get 260mm rotors with these calipers under the 13" wheels, however it drives like shit on the 13" wheels, really. Needs more width and less sidewall to perform adequately for the current performance level, let alone with the blacktop.
Anyway, I guess the order of events is this:
1) Figure out the optimal wheel choice
2) Measure the wheel
3) Calculate the rotor size
4) Find suitable rotors (probably from some Honda)
5) Machine existing hubs to accept a rotor over the top
6) Make adaptor bracket to hold these or other calipers to suit
Fred.