365mm...
Thread Starter
AudiWorld Expert
Joined: Jun 2000
Posts: 29,356
Likes: 1
365mm...
B7 RS4 brakes!
<img src="http://pictureposter.audiworld.com/6607/424.jpg">
8-piston Brembo aluminum calipers!
<img src="http://pictureposter.audiworld.com/6607/425.jpg">
365mm floating rotors on aluminum hats with all stainless hardware!
<img src="http://pictureposter.audiworld.com/6607/426.jpg">
Simply "bolt-on!"
<img src="http://pictureposter.audiworld.com/6607/rs4z.jpg">
1 word to describe their performance...WOW! :O)
<img src="http://pictureposter.audiworld.com/6607/424.jpg">
8-piston Brembo aluminum calipers!
<img src="http://pictureposter.audiworld.com/6607/425.jpg">
365mm floating rotors on aluminum hats with all stainless hardware!
<img src="http://pictureposter.audiworld.com/6607/426.jpg">
Simply "bolt-on!"
<img src="http://pictureposter.audiworld.com/6607/rs4z.jpg">
1 word to describe their performance...WOW! :O)
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Thread Starter
AudiWorld Expert
Joined: Jun 2000
Posts: 29,356
Likes: 1
What allows these large 8-piston calipers to work properly on my A4....
is the 8 small pistons.
While the OEM calipers use 1 large piston, nearly 3 inches in size, these 8-piston Brembo's have pistons smaller than 1 inch in size. They are actually staggered, 1 large, 1 small.
When the brake pedal is pressed, leverage multiplies the force applied from the pedal to a vacuum booster. The booster multiplies the force again and acts upon a piston in the master cylinder. As force is applied to this piston, pressure in the hydraulic system increases, forcing fluid through the lines to the pistons inside the calipers. Depending on the size of the pistons, this force is multiplied again, which inturn press's the pads onto the rotors.
The OEM, 1 large piston calipers, have a single force output, in a small area of the small diameter rotors, in relation to pad size.
The 8-piston calipers have 8 pistons, appling less force than the single piston caliper, however with 4 pads, they cover a much larger area of the larger rotor, which effectively gives you better braking, for less pedal effort. ;O)
While the OEM calipers use 1 large piston, nearly 3 inches in size, these 8-piston Brembo's have pistons smaller than 1 inch in size. They are actually staggered, 1 large, 1 small.
When the brake pedal is pressed, leverage multiplies the force applied from the pedal to a vacuum booster. The booster multiplies the force again and acts upon a piston in the master cylinder. As force is applied to this piston, pressure in the hydraulic system increases, forcing fluid through the lines to the pistons inside the calipers. Depending on the size of the pistons, this force is multiplied again, which inturn press's the pads onto the rotors.
The OEM, 1 large piston calipers, have a single force output, in a small area of the small diameter rotors, in relation to pad size.
The 8-piston calipers have 8 pistons, appling less force than the single piston caliper, however with 4 pads, they cover a much larger area of the larger rotor, which effectively gives you better braking, for less pedal effort. ;O)