The CDI-AC (Capacitor Discharge Ignition – Alternating Current) system in the 139QMB engine is crucial for generating the electrical spark needed to ignite the fuel-air mixture within the engine.

In the 1890s, Tesla filed a patent for his ignition system design, complete with a description of the box and a mechanical drawing of the device. The first vehicle with a CDI box was the Ford Model K ...

Utilizing a CDI box, this system can support mild builds all the way up to ultra-competitive (think 1,000+ hp) monsters. It’s another very popular direction I see people taking, and for good reason.

AEM Introduces the First Dual Capacitor CDI Ignition Module! AEM announced the release of its new Multi-Channel C2DI Twin-Capacitive Ignition Module, affirming the company's commitment to ...