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Brakes OEM and upgrades
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My Advice to Dennis for building his beautiful Wilwood Based Brake System
Hi Dennis
Some light reading for you! I agree finding rear calipers with large enough pistons and a built in handbrake is a real challenge. To maximise your choice of calipers with the right size pistons I suggest you fit the Wilwood MC4 Handbrake Caliper alongside you choice of hydraulic rear caliper which will probably be 4 piston. The Willwood Calipers are a good choice being light strong and relatively cheap. The supplier I used for my Hi-Spec mounts no longer makes them. Speedy cables can make you a handbrake cable to the design you request. I run 15 inch Azev A wheels with my R132 -6 Hi Spec front Calipers and B4 Hi Spec rear calipers on Fiat Coupe/Integrale discs. The Wilwood calipers are better quality and very good value.
Feel free to ask when you have read what I have supplied you. NB the 2018…
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Prima Brake Upgrade
Just a few pictures of the Prima brake upgrade from Vick's. Needed a bit of
fettling, but a nice, vented solution that fits in the 13" wheels :-)
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paul.courtenay
Mar 23, 2025
And here are some of the things that needed fettling: a chamfer on the alloy spacer so that it will sit on the hub (which has a radius), and 1mm of material turned from the caliper pin mounting faces to provide a bit more clearance for new pads. This isn't needed on all cars as there is a very wide tolerance in the manufacture of the hubs and bearing carriers that can mean over 1mm difference in geometry from one car to another!
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284x22x44 Fiat Coupe discs is correct. X19 1500 front hubs for the larger bearings which cope better with the load. S2 front hubs bolt together design makes them very difficult to make safe mounts.