Ignition · Ignition and Tune-Up
| System | Ignition and Tune-Up |
| Subsystem | Ignition |
| Years | 1978–1983 |
| Vehicles | 911SC |
| Confidence | Factory Verified |
Source: Porsche Technical Specifications, WKD 422 720 (911 SC/Turbo 3.3, 78-81 Models), page 24 - "Electrical system"; and WKD 423110 (911 SC, 911 Turbo, 82-83 Models), page 24 - "Elektrische Anlage" (German edition, translated) - both state "1-6-2-4-3-5" directly, covering 911 SC and 911 Turbo together. Originally sourced to Bentley Publishers, Porsche 911 SC Service Manual 1978-1983, page 280-2 (Ignition System), confirmed against a physical copy 2026-08-07 - kept as a secondary citation, not removed.