Reducing Brake Drag
I thought I had read, I believe here, a tip for getting better fuel economy was to reduce brake drag. Well that makes perfect sense to me, but in a disc brake or even drum brakes, how do you do this?
I was looking at the brakes on my Grand Prix yesterday and I just dont see how you would go about doing this. The piston in the caliper is designed to push on one pad which brings that pad in contact with the rotor and pushing that all into the opposite side pad and clamping the two together to low things down. When the brake pedal is released, the piston retracts and releases the pressure. However I can see where it would perhaps not pull it back enough to stop brake drag on the rotor.
But I just dont see how it can be made to pull back any further than it would on its own. Furthermore, what effect will this have on braking performance? Thanks in advance for any assistance.