CSL Redo for Vintage Racing

[frogisland]

Best to have a look at the homologation papers, assuming Group 2 - 1648

One option - AP Racing historic calipers

Front - depends on how much you want to spend, size of disc you intend to use. 2270's are typically £600+vat each, 2279's £1200+vat each, can be bought marginally cheaper if you shop around. I have 2279 on my e9 with 315/28 discs (1974 spec)
https://www.apracing.com/product_de...2279-closed_backed_caliper-ø44.5mm_bores.aspx
https://www.apracing.com/product_de...cp2270-closed_back_caliper-ø41.3mm_bores.aspx

Rear
https://www.apracing.com/product_de...rlo_caliper-ø38.1mm_bores-ø302x28mm_disc.aspx

 

[wsk]

On the Martini CSL we followed FIA 1648. In the front are period AP CP2270 front calipers (see photo 2), 4 pistons, 41.3 mm piston dia. At the rear we used Ate “late” Porsche 911s calipers, 2 pistons, 48 mm piston dia.. The APs were used in the '70s on Formula 1 cars and you can sometimes find them used as I did. The Ates are easy to find. We had custom rotors made up at Coleman- again, that was easy.

 

[wsk]

BTW there are more photos of the Martini here, which may be useful:
https://williamianson.com/car/martini-bmw-3-0-csl-batmobile-group-2-for-sale/