Join Date: Jan 2018
Location: Coopersville, MI
The first question is the intended use of the brakes.
For just street cruising a lot of people have good luck with some of the bargain kits available and while yes we all hate the cheap Chinese rotors and parts they tend to work. My biggest issue with the Chinese rotors is I have had to have most turned out of the box or I get that shake when I apply the brakes.
For Road course racing/driving your going to want big brake rotors. This gives them more surface area and that translates into better heat dissipation. When driving a road course or twisty road aggressively you tend to have your foot on the brake hard and frequently. You have to get rid of as much heat as possible between applications of the brake pedal. A lot of road course cars will also have special ducts to direct fresh air to the rotors. In my opinion Baer makes some good big rotor disc brake kits. Also be careful not to get really heavy rotors and calipers as this will affect the cars handling due to having more un-sprung mass. I am sure if your interested in the topic of un-sprung mass and a cars handling Big Dave can supply a lot of the science of it for automobiles. FYI this is why on independent rear ends a lot of manufacturers are moving the brake disks up next to the rear pumpkin and not out in the wheel.
For drag racing you want something light. Every pound you can remove means you can accelerate faster. The simple formula Force = Mass X Acceleration or Acceleration = Force/Mass tells me that the more mass I have the more force I will need to accelerate at a given rate. For all out drag cars the brakes only have to operate hard 2 times in a run. Once during burn out and once at the end of the track. They make special drag racing brake kits that have rotors turned to their minimum diameter, light weight calipers, and brake pads that only last for a night or two worth of passes. Those of us building Pro Street cars though have to come to a happy medium though as these cars are used on the street just as much if not more so than they are on the track.
1963 Impala Convertible (Frame off resto-mod in progress)
1963 Impala 2 door hardtop (Pro Street build in progress)
1963 Impala 4 door hardtop (Parts car)