Shift time
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Shift time refers to the time interval between gear changes in a transmission during which power delivery is interrupted. This is usually in reference to motor vehicles but can apply to any gearbox. Reducing shift time is important in performance vehicles or race cars because it means the vehicle is rolling without power to the wheels. Shift time in a manual gearbox is dependent on the driver but in automatic or semi-automatic cars the electronic mechanism must be tuned to minimize the time between gears. One method of drastically reducing shift time is to use a Direct-Shift Gearbox which has two independent clutches that predict the next gear change making the shift time very small.
[edit] Shift Times
- A long shift time is considered anything over 625 ms [1]
- The average manual car driver: 500 ms - 1 s
- Aston Martin Vanquish: 250 ms [2]
- Ferrari 575M: 220 ms
- BMW M3: 220 ms
- Audi TT Quattro 3.2 (Direct Shift): 200 ms[3]
- Ferrari 360: 150 ms
- Enzo Ferrari: 150 ms
- Ferrari FXX: Under 100 ms [4]
- Bugatti Veyron (Direct-Shift): 8 ms
- Volkswagen Golf GTI (Direct-Shift): 8 ms
[edit] See also
[edit] References
- ^ Tech Tips: Understanding TAP. Automotive Service Association. Retrieved on 2006-07-29.
- ^ Volkswagen makes way for DSG. Paul Tan. Retrieved on 2006-08-11.
- ^ Audi TT Review. Evo Car Reviews. Retrieved on 2006-07-29.
- ^ Ferrari FXX Breaks Cover. Piston Heads. Retrieved on 2006-09-23.
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