An article this month in Euro Car got my mind wondering a little bit, 
no one is going to argue I'm sure that late Bus and Vanagon brakes 
could not use a little upgrading, well the article details a cheap 
upgrade to Porsche 914 brakes instead.  The 914 uses an ATE caliper 
very much similar to the Vanagon, the primary difference with the Bus 
being the inlet of the hydraulic pipe.  Now the upgrade is the fact 
that early BMW 3 series calipers are a direct bolt on replacement for 
earlier 914's and fit with slight machining for offset on late 914's. 
The interesting thing is that even though the caliper is much larger 
physically with a larger piston for greater hydraulic advantage and 
larger pads, the mounting holes line up, so why not maybe the same 
mounting on Buses and Vanagons I wonder.  Anyway the '85 needs new 
calipers anyway, the 914 and 3 series used 14"? or 15"? wheels so the disc 
size may have been similar as may be the mounting pattern and offset, 
as the 914 seemed to use the hub integral in disc system like a bus, 
hence again maybe offset OK as well and slight machining or spacers 
not much of a problem anyway.  Anyone with a 914 want to help or 
conjecture?  I think I'm going to go looking for a junkyard 3 series 
caliper to find out anyway.  A little more clamping force and fade 
resistance would be real nice for a Van particularly, now the Bus 
install would require a bit of piping changes.  Anyway may not even 
be worth it, I'm going to look tomorrow at the size of the pistons in 
the Bus/Van calipers as the "upgrade" size was listed in the article 
but slips my mind here.

John
vwbus@netbiz.net