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I’m a 944 guy, but I know you guys with 928s are also looking for bigger brakes without taking a second mortgage. For my 944, I made some really simple adapters to run Boxster calipers on the rear with stock NA calipers. The 944 rear mounts are the same bolt spacing as 951s, and I believe some 928s, or at least very close, which means these should be simple brackets to make for you guys. I did everything on my Clausing drill press. But if you can drill and tap straight holes, you could even do it with a hand held drill.
EDIT: Don't mind the upside down caliper and long bolts. Just test fitting everything. And don't mind my short wheel studs... definitely need longer ones.
For all 928 people out there this will work on all 78 to early 86 cars for the rear.
You can bolt Volvo 240 calipers that come from a car with ABS to the front of a 78-81 as a direct bolt on. They fit over the stock rotor with some light grinding.
For all 928 people out there this will work on all 78 to early 86 cars for the rear.
You can bolt Volvo 240 calipers that come from a car with ABS to the front of a 78-81 as a direct bolt on. They fit over the stock rotor with some light grinding.
Is the front on a different bolt spread than a 944? I thought the early ones were the same as the 944 NA
78-81 fronts are the same as a 944 NA. The rears are the same all the way to early 86. After that they got 4 piston calipers front and rear. They're the same as the M030 option in 944s.
78-81 fronts are the same as a 944 NA. The rears are the same all the way to early 86. After that they got 4 piston calipers front and rear. They're the same as the M030 option in 944s.
This is good info. That means running Boxster calipers would be fairly easy for many of the cars that are running floating calipers.
As to why you would do this, party for looks, partly for improved braking performance. Since you are running the same discs, the performance improvement wouldn't be huge. But 4 piston calipers have better heat dissipation, and much more even pad contact. This means while your stopping distance won't be shorter, you will get less brake fade. This is the primary benefit to big brakes. They don't necessarily improve stopping distance if the tire and suspension stays the same. Drum brakes can actually be quite a bit stronger than disc brakes, which is why semi trucks still use them often. They just don't work well in repeated braking.
06-08-2018, 05:42 PM
Boxster Caliper Adapters
