After using Photo mode and watching my re-plays I noticed that the brakes didn't glow as in GT4 Prologue and all my pictures don't show the brakes glowing very odd.
There is most definately the brake disc glow in GT4. As stated before, it doesn't show by just tapping the brakes (as it shouldn't) but it will show under heaving braking (as it should).
Dont think so, I have been to Le Mans a few times and the 900, 675 and GT cars all light up the disks even in the daylight and watch them brake at night, say 3am it makes your eyes hurt due to the brightness and its not the weight of the cars its the speed they try and scrub off before the corner .....nice carbon brakes glow big orange doughnuts ................mmm need coffee by!
Stock cars/brakes may be different though but I would say they take long to slow down and heat up more?