Ignition condenser specifications

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By Friartuck June 29, in Technical. Does anyone know what the capacatance value in micro farads of a condensor for a four cylinder 6 volt ignition system? This is for an eight cylinder engine that uses dual ignition; two seperate sets of points, coils and condensors. The originals are shorted out background in photo and their packaging requires a replacement that has a mounting flange with wire to the points candidate in foreground , all intenal to the distributor. My 34 Packard uses what appears to be a similar system to the one you're inquring about; 6-volt, dual coil, dual point, dual condensor, with a double-ended rotor for two 4-cylinder systems. A good condenser, more correctly a capacitor, for a GM 6 volt ignition system has a capacitance of. I think the 12 volt system would be about the same.

Ignition condenser specifications

Basically the function of a condenser in a coil ignition circuit is to reduce the spark at the contact points as they open in the distributor and thus minimise burning and pitting of the points. Arcing is caused by the effect of self induction in the coil as the points interrupt the flow of current. The resultant collapse of the magnetic field produces a high voltage to be generated in the primary winding which then tends to flow across the points, thus causing burning or pitting. This current flows into the condenser and charges it as the points open the rapid collapse of the magnetic field produces this high voltage in the primary windings, which can be as high as volts. This further charges the condenser and the consequent collapse of the field causes a high voltage to be induced in every turn of both primary and secondary windings. As the secondary winding has about times the number of turns of the primary, the voltage can reach as high as volts. Normally this voltage is not reached as it is limited by various factors such as point gap, compression, engine revs. As the spark is produced at the plug gap the energy in the coil, stored in the form of magnetic flux, begins to drain from the coil through the secondary circuit thus sustaining the spark for a fraction of a second or several degrees of crankshaft revolution. During this interval the condenser discharges back through the primary winding producing an oscillation of the current flow in the primary circuit for the brief interval that is required for the primary circuit to return to a state of equilibrium. Burning of points results from high voltage, presence of oil or other material at the points, defective condenser or too small a gap in the points. High voltage can be caused from high voltage setting of the regulator or high resistance in the charging circuit or the third brush set too high. On third brush generators too small a gap at the points allows the points to stay closed longer resulting in the average current being high enough to allow the points to burn rapidly. Contact pitting results from an out of balance condition in the system which causes the transfer of tungsten from one point to the other so that a tip builds up on one point and a pit on the other. The direction in which the tungsten is transferred gives an indication for correcting the situation.

Usually I use 0.

The Magneto Guys. Condensers - theory. Before considering the function of the condenser in a magneto ignition circuit, it may be worthwhile to outline the basic operation of the magneto ignition circuit as a whole. The secondary winding is wound directly over the primary winding and so this winding magnetic field is also linked to the secondary windings. When the points open, the current flowing in the primary is interrupted and the winding magnetic field collapses, thereby passing lines of magnetic flux through both the primary and secondary windings. This results in a high voltage — several hundred volts - to be induced in the primary winding and a considerably higher voltage — thousands of volts - to be induced in the secondary winding. Without a condense r fitted when the points open, the self induced voltage in the primary coil allows current to continue to flow for a time in the form of an arc between the contacts.

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Ignition condenser specifications

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How interchangeable are they? Tonneau Covers. Dee Zee. Wonder why we call them condensers instead of capacitors? This is with a stockish coil. It may not display this or other websites correctly. It peaks at around V, and that's probably limited by sparks in the switch used to switch it off - a small capacitor could probably have bumped that up even higher. What's new. Anyways, a quote from my oldest Motors manual, "If the mound is on the positive point, install a condenser of greater capacity; if the mound is on the negative point, install a condenser of lesser capacity". Still have flywheels off. In design, we utilize high quality, Mylar insulating materials to withstand electrostatic stresses and prevent damage to the internal metal foil windings. Replies 17 Views 1,

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Current flow being minimum is where the points will have the longest life. This further charges the condenser and the consequent collapse of the field causes a high voltage to be induced in every turn of both primary and secondary windings. A good condenser, more correctly a capacitor, for a GM 6 volt ignition system has a capacitance of. If don't know what MFD value to use can trial and error it if you have several caps, Just look for least points arc and best spark. I think the 12 volt system would be about the same. Max Gearhead and Dave Downs like this. Dave G in Gansevoort , Aug 8, Briggs letter series ignition condenser hack. It seems like the condenser used across the ignition points needs to be VDC or higher. Yes, my password is: Forgot your password? Though it could apply to any set with a condenser in the points circuit. Selecting a replacement condenser. This information was taken from a Delco Remy electrical equipment book. I think he means that one of the factors the determine the desired capacitance is engine speed; the faster you run the engine, the more capacitance is appropriate; this is why the old Mallory "trash cans" and the currently available Vertex magneto condensers are rated at.