Hi Peter, There are several reasons why I want to develop my brake conversion, the main one being now is that I want a 1960’s looking aluminium caliper, that doesn’t necessitate having to widen the track too much, that preserves the original pedal feel, and does not alter the front rear brake balance.
At the moment, I have found a production 35 mm opposed pot caliper, A stock disc that I can remachine,to fit the imp hub and that leaves some brackets to get laser cut and zinc plated. This new kit will be photo ready and tested in January. I have a car ready to evaluate it on !
I want to make the Best Imp disc conversion.
The D12R caliper was aluminium, pictured above, was used on imps, with pads available from imp specialists at the time, however with a either a 43mm or a 48mm piston size, this caused a front rear brake inbalance. At the moment my prototype is in 2 halves, whilst I get the shape correct. Once this is achieved, the caliper will be cast in one piece, and manufactured from heat treated aluminium, and be interchangeable with the D12R
Pistons and seals will be from another 1965 rear engined classic, that I might have one or 2 off in the workshop.
Regarding liability sign off, I have tested a large number of brake calipers, for strength and durability, and I will test my caliper, and I still have contacts in component test.
Additionaly the D12R does not have a dust boot on the caliper piston, making it unsuitable for a road car At the moment,
However I have found a production 35 mm opposed pot caliper in cast iron weighing 2.1 kg, the aluminium D12R weighs 1.1 kg A stock disc that I can remachine,to fit the imp hub and that leaves some brackets to get laser cut and zinc plated. This new kit will be photo ready and tested in January. I have a car ready to evaluate it on !
. However roarys done a 1000 miles. He's been behaving himself although I have found some bits that need welding 
on this scuttle edge behind the bonnet so it time for another rebuild, I guess his turn will be behind Rubens and I suppose I could run the 1150 with its twin 40's on a pneumatic throttle. And that will save me a job on Rubén engine.
Someone obviously mixed up the parts once they were dismantled, I always keep stripped assemblies in their own box so there's no chance of mated parts not going back with their matched components, old ice cream tubs are great for this.
