Mallory Ignition Parts

[mockingbird812]

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<span style="font-style: italic">...the dual point ignitions had point sets that are are offset a few degrees on the point plate... one set opens the circuit and the other set closes the circuit therefore giving the coil more saturation time (dwell) in the same 30 degrees of crank rotation as single points. I had a Mallory Rev-Pol distributor in my '56 Chevy which worked very well with 11:1 compression ratio and at 6500 RPM. Pontiac introduced the transistorized ignition system in 1963 and that system was far better than any of the dual point systems.The Mallory Rev-Pol distributor had dual coils and dual external capacitors. The Rev-Pol dual points were operated by a 4-lobe distributor cam which increased coil saturation time and reduced point bounce at high RPM. With a point type ignition, coil output voltage is reduced because coil saturation time decreases as the RPM increases and that is when dual points will help maintain coil saturation time at high RPM. Today, one of the best replacements for a point type ignition is a Pertronix electronic coversion kit. The Pertronix kit provides the same amount of coil saturation time at infinite RPM as it does at idle RPM. However, that kit is not as good as a stock GM high energy ignition found on cars today. The HEI systems on GM vehicles is not necessary for high compression ratios or high RPM but it is required to fire the lean fuel-air mixtures that were mandated by the EPA to reduce emmissions.

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