So, You want Boxster Calipers, under 15" wheels..., and you say you have 3" M struts eh? Options

[Aaron Cox]

hmm... lots of people in that boat.

going to later 3.5" struts means, you A ) have to pony up for them (IMG:style_emoticons/default/tongue.gif) B ) use inserts for a heavier 911, or have your 911 units revalved for 914 weight characteristics.

So myself and craig downs sat down and did some thinking.
We wanted to achieve the sleeper look of 15" wheels, but something more modern than M calipers, A calipers, and less expensive than S calipers, AND something you can get parts for (tried getting 951/944 turbo caliper parts lately????)

so we came up with boxsters.... (NON S)
*Fairly Cost effective
*light weight
*pads are double the size
*use readily available 911 carrera rotors
*parts are cheap and available.
*the calipers can be as new as 2003....

So how do you achieve this?

pretty simple. Several mockup sessions behind our favorite mexican food place on lunch breaks.... having the parts... and having a mill.

unlike 3.5" struts, a bolt on solution could not be made to fit under 15" wheels. The 3" ears interfere with the brake pads on the calipers, and spacing them out to clear would require a bigger rotor (951?) and makes 16" wheels mandatory.

Here is what we came up with


The unsuspecting victims.... (fronts and rears.... (rears are going on soon))
Cheap. Light. Newer. Gooder



one of the jigs, ready to put a step into the strut.


making a level 'step' for the adapter to lock into and a nice level/true support.


The finished products, after removing a certain amount of material. Nice and flat and true, lots of surface area (IMG:style_emoticons/default/smile.gif)


The corresponding step about to be cut into the adapter blocks. 6061 T6 Aluminum.




fast forward a few to the final products

[john rogers]

Would it be possible to not mill the strut mount where you do to get the edge to locate the adapter block and instead use the edge where you cut off the extra material as a locator? I would be interested to try this setup on the vintage 2.0L race car as I have a set of the 4 bolt hubs with vented rotors and a bit of additional brake ability is always nice. This would be a good real racing stress test I would think.