Q Would the application of a transistori
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zed ignition system to the petrol engine of a delivery van offer advantages in terms of reduced fuel consumption, easier starting and less maintenance?
AA transistorized ignition has no contact
breaker and is capable of operating efficiently at very high engine speeds. It is, therefore, particularly suitable for racing-car engines but currently is very expensive to produce, has poor cold-start characteristics and would probably offer little advantage in the case of a relatively slow-speed engine, apart from the elimination of contact pitting and heel wear.
Developments in transistor-assisted ignition systems give promise, however, of greatly increased contact life and possibly a better spark. It should be remembered that an inefficient combustion system derives more benefit from a "fat" spark than an efficient one, and for this reason, the use of highoutput coils in conjunction with wide sparking plug gaps is now comparatively rare.