4zilch wrote: ↑Fri Oct 27, 2017 10:12 am
dubshow wrote: ↑Fri Oct 27, 2017 9:46 am
Also show me how breaking distance is increased with mud tires
Larger diameter than what the brakes were intended to handle.
It takes more applied force to slow the rotation of a larger diameter tire.
Also available traction
Imagine a disc and axle spinning together the further out you grab the disc, the easier it is to stop.
I'm assuming the mud tars have more traction and are a larger diameter. Therefore applying a much larger moment to the spinning wheel than the brakes are capable of overcoming. If the brakes can lock up the stock wheels/tars but cannot lock up mud wheels/tars then that's it. Increase the braking force until you can lock the wheels up and you've balanced the equation. But until you do that your braking distances will increase substantially with the mud tires on the vehicle.
Ways to increase the moment that the brakes can apply? Moment = Force x Distance
Ways to increase Force:
Pad changes
---Higher friction compound pads
---Larger swept area of pads
Higher hydraulic pressure
---Larger diameter piston in the calipers
---Larger diameter brake booster or master cylinder with more leverage
More efficient power transfer
---Stiffer calipers
---Braided brake lines (mostly a tuner bullshit mod but whatever)
Ways to increase Length:
Rotor changes
---Larger diameter rotors, i.e. moving the calipers farther away from the hub
BBKs address basically all of these at once.
Pads alone will add force.
Larger rotors will increase distance.
If you can increase distance by 12% as this rotor change does, the change in applied moment is EQUAL TO pads with 12% grippier compound.
If you add 12% larger rotors and 12% grippier compound you're increasing the braking moment by 25%. (1.12^2=1.25)