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2. High energy ignition - Wikipedia

   en.wikipedia.org/wiki/High_energy_ignition

   A predecessor system called "Unitized Ignition" was optional on 1972 and 1973 Pontiacs. [citation needed] Most—but not all—HEI systems have the ignition coil mounted in the distributor cap. A control module and magnetic pickup are mounted in the distributor, in place of a conventional ignition system's breaker points and condenser.

3. Duraspark - Wikipedia

   en.wikipedia.org/wiki/Duraspark

   The Duraspark II ignition system is a common upgrade [1] for older Ford cars equipped with a points-type ignition. In most cases, the distributor will interchange with the older-style points distributor. The system is similar to some aftermarket systems [2] and the control module may be easily swapped. Duraspark swaps are easy and can be run by ...

4. Distributor - Wikipedia

   en.wikipedia.org/wiki/Distributor

   In older distributors, adjusting the ignition timing is usually achieved through both mechanical advance and vacuum advance. Mechanical advance adjusts the timing based on the engine speed (rpm), using a set of hinged weights attached to the distributor shaft. These weights cause the breaker points mounting plate to slightly rotate, thereby ...

5. Ignition system - Wikipedia

   en.wikipedia.org/wiki/Ignition_system

   As batteries became more common in cars (due to the increased usage of electric starter motors), magneto systems were replaced by systems using an induction coil.The 1886 Benz Patent-Motorwagen and the 1908 Ford Model T used a trembler coil ignition system, whereby the trembler interrupted the current through the coil and caused a rapid series of sparks during each firing.

6. Chevrolet small-block engine (first- and second-generation)

   en.wikipedia.org/wiki/Chevrolet_small-block...

   In the ignition system, CCC was fully responsible for the timing curve; mechanical and vacuum advances were eliminated from the distributor. The more precise spark timing provided by the CCC made possible a series of increases in compression ratio from a pre-CCC 8.4:1, to 8.6:1, to a knock-sensor–assisted 9.5:1, all while still only requiring ...

7. AMC straight-4 engine - Wikipedia

   en.wikipedia.org/wiki/AMC_straight-4_engine

   The initial versions included a distributor with conventional mechanical and vacuum advance featuring a computer, and individual cylinder knock sensors that can advance up to 6 degrees when the engine is running knock-free or compensate for low-quality fuel in two-degree steps for up to 12 degrees of spark retard. [2]