Porsche 914 Technical Information
Brake System Data
| Description | Sizes and Settings | Wear Limits |
| Tandem Brake Master Cylinder | ||
| Bore | 17.46 mm dia. | |
| Stroke | 18/13 mm | |
| Ratio at foot pedal | 5.4:1 | |
| Play: operating rod/piston | 1 mm | |
| Front Wheel Brakes | ||
| Brake disc diameter | 281 mm | |
| Thickness, new | 11+0.05 mm, -0.15mm | |
| Min. thickness after machining* | 10.0mm | 9.5 mm |
| Thickness tolerance | Max. 0.02 mm | |
| Lateral run-out, installed | 0.2 mm | |
| Caliper piston dia. | 42 mm | |
| Pad thickness | 10 mm (14 mm from 1973 models) | 2.0 mm |
| Clearance | 0.05-0.2 mm | |
| Surface of four pads | 100 cm2 | |
| Rear Wheel Brakes | ||
| Brake disc diameter | 282 mm | |
| Thickness, new | 9.5-0.2 mm | 8.5 mm |
| Min. thickness after machining* | 8.9 mm | |
| Thickness tolerance | Max 0.02 mm | |
| Lateral run-out, installed | 0.2 mm | |
| Caliper piston dia. | 33 mm | 2 mm |
| Pad thickness | 10mm | |
| Clearance | 0.2 mm | |
| Surface of four pads | 80 cm2 | |
*Machine brake discs uniformly on both sides.
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