RX Reven' wrote:
nderwater wrote:
RX Reven' wrote:
FanBoi.....Yo, I’m upgrading my brakes
So /DRIVE just published a 50-0 mph brake test using a late model BMW 328i. Wheels/tires were the same on every run; pads/rotors/calipers were the variables. Their results?
Stock brakes, first run stopping distance - 86' 5"
Hawk pads, first run stopping distance - 75' 3"
AP Racing big brake kit, first run stopping distance - 71' 5"
Maybe Fanboi was on to something?
Hi nderwater,
Admittedly, my post was overly simplistic…I was trying to be funny and direct attention towards the most important factor.
Getting more technical, I would expect that a pad / rotor system that’s operating near its limit would have more variability than one that has significant reserve capacity. This variability needs to be accounted for by operating at a reduced average braking force level so that the peaks in braking force don’t exceed the tires gripping limits resulting in a skid.
So yes, I do believe upgrading the brakes will reduce stopping distance even if the existing brakes are capable of locking the tires. However, assuming we’re talking about an upgrade that includes larger rotors, both rotational mass and un-sprung weight will be increased which is bad M-Kay.
Not necessarily, there are many BBKs that drop weight from the car.
For instance the AP Racing Spring kit for BRZ/FR-S drops 10lbs a corner up front, there is a Wilwood kit taht drops something like 35lbs combined from the front brakes.
z31maniac wrote:
RX Reven' wrote:
nderwater wrote:
RX Reven' wrote:
FanBoi.....Yo, I’m upgrading my brakes
So /DRIVE just published a 50-0 mph brake test using a late model BMW 328i. Wheels/tires were the same on every run; pads/rotors/calipers were the variables. Their results?
Stock brakes, first run stopping distance - 86' 5"
Hawk pads, first run stopping distance - 75' 3"
AP Racing big brake kit, first run stopping distance - 71' 5"
Maybe Fanboi was on to something?
Hi nderwater,
Admittedly, my post was overly simplistic…I was trying to be funny and direct attention towards the most important factor.
Getting more technical, I would expect that a pad / rotor system that’s operating near its limit would have more variability than one that has significant reserve capacity. This variability needs to be accounted for by operating at a reduced average braking force level so that the peaks in braking force don’t exceed the tires gripping limits resulting in a skid.
So yes, I do believe upgrading the brakes will reduce stopping distance even if the existing brakes are capable of locking the tires. However, assuming we’re talking about an upgrade that includes larger rotors, both rotational mass and un-sprung weight will be increased which is bad M-Kay.
Not necessarily, there are many BBKs that drop weight from the car.
For instance the AP Racing Spring kit for BRZ/FR-S drops 10lbs a corner up front, there is a Wilwood kit taht drops something like 35lbs combined from the front brakes.
Nice...I’ve never owned a high torque car so I’m thoroughly fixated on weight reduction.
Old joke: Honey, I wasn’t able to fix your brakes so I made your horn louder.
