Just a small update. I haven't made much progress on anything for a while. I've had some health issues. I'm better now so getting back into the shed.
Here's another brake conversion. This time it's Modena's rear brakes.
Ben's CR uses VE Commodore rear uprights. We've adapted Ford territory rotors from DBA which are 328mm in diameter which is a good fit inside a 17" wheel. Converting the rotors just meant re drilling the bolt pattern and machining a small spacer ring. The ring is to make sure the rotor's larger center bore is centered over the slightly smaller Holden hub spigot.
Ben sourced some very nice AP calipers to match his front ones however adapting them to the Holden hub proved tricky. The location of the mounting lugs on the hub means that a conventional dog bone mount wasn't going to work. Dave W had done the same conversion and hit the same issue. I ended up machining some L shaped brackets similar to Dave's to get around the clearance issues.
These started as a block of 38mm square 1020 cold rolled steel bar stock. The normal hot rolled bar stock you buy from the steel merchant is the same 1020 steel but the cold rolled version is a significantly stronger material. I had to make them from steel since they wouldn't have been strong enough in aluminium. Just not enough material there.
To get around the clearance issues the brackets use countersunk head cap screws to attach the caliper. I'm a bit of a fan of countersunk bolts as I like how they spread the load over a larger area and self center. It's just more work to machine parts to suit.
You can see from these pics why it was tricky to mount the calipers to the existing lugs.
Still got to trim the bolts to the right length.
Despite being made from steel the brackets turned out to be surprisingly light weight. There's a huge pile of swarf on the mill though as probably about 70% of the original block has been milled away to reveal them.
Now to get stuck back into my own projects.
Cheers
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