DIY S13 240sx Ignition Coil Mod Hotwire Tutorial
DIY tutorial for your S13 240sx
How to hotwire or boost the voltage on the ignition coil to provide for smoother operation, especially noticeable on boosted applications, and an overall snappier feel.
[ TECHINICAL NOTES ]
The ignition coil is engineered for 12 volts in order to produce the maximum spark. Increasing the input voltage does NOT increase the output voltage. BUT... The ECU voltage output can sometimes drop below 12 volts (11.6v etc.) and this drop BELOW 12 volts will actually decrease the output voltage.
Providing a constant higher-than-needed voltage on the input will guarantee that the voltage will not drop below the voltage the coil was designed for (unless your charging system goes bad). The benefit is that throughout the entire RPM range and under almost any load conditions, you will be sure that you are getting the amount of spark you need.