Brit01 wrote:Just to confirm this is an electronic magnetic pick up type.
And then connect the green and violet wires to the pick up from the distributor as shown in the MSD schematics.
The small white is not used (well it can be used as an anti-theft device by using a switch which is grounded)..
You agree Perry?
Chris, NO. Your reading to much into the distributor magnetic pickup. Wiring as described previosly.....DO NOT TOUCH YOUR distributor.
Whatever is at the other end of your negative wire is already giving your tacho a signal. The MSD at the other end ( which was your coil negative ) is utilising that signal to fire the MSD.
How does your coil work; as long as your ignition is ON, it energises the coil through the positive terminal. Wherever your engine gets its 'firing signal' from, which is more than likely the distributor, this tells the amplifier to give an earth the the coil which takes power AWAY from it at the precise time it needs to fire and then re-energise. ALL THE MSD DOES IS TAKE THIS PRIVILAGE AWAY FROM YOUR EXISTING IGNITION SYSTEM and does the work itself. Hence nothing apart from the MSD is connected to the coil. Your existing distributor, distributor signal, rpm readings are all doing exactly what they are doing before. Its just the MSD doing the sparking. The MSD generates the energy through a massive capacitor backwards through the coil using the positive connection to interupt/intermit the firing point, thus storing the energy in its own gubbins rather than in the coil. In other words, the MSD has the energy already stored that the coil has lost in its last spark. BUT even better, is that it multi sparks at a much higher energy rate than any coil can achieve.
Think about the high capacity in car audio systems that run 18" subs and 5,000 watt amplifiers............they all run CAPACITORS so that current is available at each point the sub goes 'BOOM'. Very similar but less expensive.
The primary factor of electronics is knowing what a transistor does. The secondary factor of this understanding is knowing the difference between voltage, current and load. Give up trying to understand the MSD if you do not know what a transistor does. Just wire it up and enjoy the easy starting, hot and cold start issues and elimination of missfiring that it provides.
Do not mention again about connecting your distributor to the green and voilet wires. Your car wont start becuase you have taken its ability to give your tach signal to the ignition amplifier which the MSD ie reliant on a signal from.
Perry