996 Carrera Group 4 Running Gear / PAGE 255
46 Technical data · Designation Notes, dimensions Wear limit
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911 Carrera 4 (996) Brakes -Brake mechanics
46 Technical data
Designation Notes, dimensions Wear limit
Operating brake Hydraulic dual-circuitbrake system with front
(foot brake) axle-rearaxle brake circuit distribution. Vacuum
brake boosterI internallyventilated and perforated
brake discs with four-piston monobloc fixed
caliper at front and rear axles.
PSM* (Eorsche.stabilityManagement)standard.
Brake booster (vacuum) ~ 10 inches
Boost factor 3.85
Brake master cylinder 13 front 23.81 mm
13 rear 23.81 mm
travel 18/18 mm
Brake proportioning control * * EBV.
Brakediscs 0 front 318 mm
0 rear 299 mm
Effectivebrakedisc ~ front 261.8 mm
~ rear 247.4 mm
Piston~ in brakecaliper front 2 x 40 + 2 x 36 mm
rear 2 x 30 + 2 x 28 mm
Brakepad area front 254 cm2
rear 196 cm2
Total brake pad area 450 cm2
Standard Porsche Stability Management(PSM)with ABS, Traction Control (TC),ABD, MSR
(engine drag torque control), FZR(vehicle regulator)and EBV(electronic brake distributor)
functions. Passive switching po~isibilityfor TC, FZRand MSR.
EBV = electronic brake distribu1:or(brake proportioning control). As a result, no screw-in
brake proportioning valves are required.
46 Technical data 46 -101
Printed in Germany -15, 1998 C4_46101
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