Dual rear calipers? I’m a moron

[Ande]

Yes only with PP as the rear brembos have no built in park brake hardware as most cars with rear disc brakes do.

You sure about that? I think all cars with Brembo brakes have the dedicated parking brake. My car with Brembo brakes, no PP, has the separate parking brake.

Sponsored

 

[LouG]

Yep, the brembos are dedicated to stopping the car!

Yep. I admire their dedication.

 

[Sofa King]

No, the drift brake is separate from the Bembos.

I did say I could be wrong... but I have never thought there was too much rubber on my tires, so never tried it. Going by the electrical schematics the brake handle has a proportional signal, so should act like a cable brake lever, pull more for more brake. But the park brake motors have only a lock or unlock input. If the system just locks up the brakes, there is no need for a variable signal, a switch would do the same at less cost. I guess I will have to try when it's new tire time...

 

[davidkwpg]

I did say I could be wrong... but I have never thought there was too much rubber on my tires, so never tried it. Going by the electrical schematics the brake handle has a proportional signal, so should act like a cable brake lever, pull more for more brake. But the park brake motors have only a lock or unlock input. If the system just locks up the brakes, there is no need for a variable signal, a switch would do the same at less cost. I guess I will have to try when it's new tire time...

Just a guess…could be 100% wrong…..sounds like it’s activating a wet contact to lock and power the rear caliper in normal use Because it’s not a part of the main brake system and master cylinder ?

 

[davidkwpg]

Just saw a schematic online….the parking brake is electronic and the motor near it is energized to either be in closed or open mode….so we have a normally closed or open scenario

 

[LouG]

I did say I could be wrong... but I have never thought there was too much rubber on my tires, so never tried it. Going by the electrical schematics the brake handle has a proportional signal, so should act like a cable brake lever, pull more for more brake. But the park brake motors have only a lock or unlock input. If the system just locks up the brakes, there is no need for a variable signal, a switch would do the same at less cost. I guess I will have to try when it's new tire time...

They call it a drift brake now, but back in the early rallying days it was a fly off handbrake. Instead off pressing the button to release the locking pawl, pressing it activated the pawl to lock the handbrake on.
So you could just yank on the lever and lock the rears without the lever locking on.
Then they went to hydraulics.

 

[davidkwpg]

They call it a drift brake now, but back in the early rallying days it was a fly off handbrake. Instead off pressing the button to release the locking pawl, pressing it activated the pawl to lock the handbrake on.
So you could just yank on the lever and lock the rears without the lever locking on.
Then they went to hydraulics.

Very interesting….never heard that fly off handbrake term before….cool

 

[davidkwpg]

From ford

The electronic drift brake present in the 2024 Ford Mustang is part of the Performance Electronic Parking Brake feature, which is available in both EcoBoost and V8-powered models equipped with the optional Performance Pack. While it utilizes a traditional-looking hand brake, this feature unlocks the Mustang’s drifting capabilities by emulating the hydraulic drift brake found in the RTR racing variant, yet provides three times the braking force of a conventional mechanical parking brake system.

like a said, that 2nd callper is pretty beefy

 

[LouG]

Very interesting….never heard that fly off handbrake term before….cool

I modified the handbrake on my 1960 Morris Minor ute to flyoff style. It didn't turn it into a rally car though.

 

[davidkwpg]

I modified the handbrake on my 1960 Morris Minor ute to flyoff style. It didn't turn it into a rally car though.

Had to google that car brand…..we don’t get too much stuff in Canada or the forbidden European fruit

 

[roket]

the reason why the parking brake is in the mini caliper, from what i can tell, is because parking brake calipers are restricted to being sliding calipers instead of fixed ones. this started on Fords with the 2017 Ford GT and spread to the 2020 GT500, both vehicles with 4 piston rear brakes but electronic parking brakes. as for why most electronic parking brakes are sliding calipers, i have no idea, but my best guess is the potential issue with driving multiple pistons with one motor plus the fact that you would need a motor on each side of the caliper to apply both brake pads on a fixed caliper. exotics do some trickery where they hide the parking brake caliper in the main caliper body, but it's still technically it's own thing. example picture from a Ferrari F8 Spider, ~$450k vehicle

and also, from my understanding, the drift brake actually uses the main rear caliper via telling the ABS module to apply the rear calipers in varying pressures, hence why it requires the vehicle being in track mode where traction control is off and stability control is very passive

 

[Farmer Fran]

My non PP has it also.

 

[Sofa King]

My non PP has it also.

Optional brembos?

 

[davidkwpg]

the reason why the parking brake is in the mini caliper, from what i can tell, is because parking brake calipers are restricted to being sliding calipers instead of fixed ones. this started on Fords with the 2017 Ford GT and spread to the 2020 GT500, both vehicles with 4 piston rear brakes but electronic parking brakes. as for why most electronic parking brakes are sliding calipers, i have no idea, but my best guess is the potential issue with driving multiple pistons with one motor plus the fact that you would need a motor on each side of the caliper to apply both brake pads on a fixed caliper. exotics do some trickery where they hide the parking brake caliper in the main caliper body, but it's still technically it's own thing. example picture from a Ferrari F8 Spider, ~$450k vehicle

and also, from my understanding, the drift brake actually uses the main rear caliper via telling the ABS module to apply the rear calipers in varying pressures, hence why it requires the vehicle being in track mode where traction control is off and stability control is very passive

Very interesting

 

[Sofa King]

the reason why the parking brake is in the mini caliper, from what i can tell, is because parking brake calipers are restricted to being sliding calipers instead of fixed ones. this started on Fords with the 2017 Ford GT and spread to the 2020 GT500, both vehicles with 4 piston rear brakes but electronic parking brakes. as for why most electronic parking brakes are sliding calipers, i have no idea, but my best guess is the potential issue with driving multiple pistons with one motor plus the fact that you would need a motor on each side of the caliper to apply both brake pads on a fixed caliper. exotics do some trickery where they hide the parking brake caliper in the main caliper body, but it's still technically it's own thing. example picture from a Ferrari F8 Spider, ~$450k vehicle

and also, from my understanding, the drift brake actually uses the main rear caliper via telling the ABS module to apply the rear calipers in varying pressures, hence why it requires the vehicle being in track mode where traction control is off and stability control is very passive

I was trying to say the same thing... that was how I thought they work.

Sponsored