I understand circuit racers wanting rear disc brakes as they cool faster than drums.
Oh absolutely, and this is a perfect demonstration of what I'm on about. Circuit racing is completely unlike any form of road driving, even that of the most 'spirited' nature. The idea that a road car needs brakes that react like a race car's is frankly dangerous.
Simple example: How many race cars need to be able to do a crash stop with cold brakes? They have plenty of time to get pads and discs up to proper operating temperature. What racer cares if the brakes are a bit dodgy when cold? In a road car it's an absolute must.
All of the race cars that dont use the tyre heating technology of F1, and that is most race cars. But then thats an issue largely limited to CCM brakes anyway. Ordinary cast iron brakes have the reverse issue. Its excessive heat that stops them working.
The Trad has an advantage in its limted weight. At any given speed it has about half the energy of my F type to dissipate as heat when braking. But the brakes are sized accordingly or should be.
The issue with drums is that they are worse at dissipating the heat and worse still the hydraulics that suffer from excessive heat are internal to the brakes and outside the cooling air flow. So on first stop they will work as well as discs, and indeed will likely work better than a CCM brake, but if you are driving fast down a steel hill ( Porlock for example) there is a much greater risk of losing brake power with drums. And I suspect that the front discs will be affected by boiling brake fluid in the drums as well.
Trads are wonderful pieces of nostalgia but to kid yourself that we havent made great strides since they were first designed is wrong.
