replacing sparkbox igniter in 1975 ford bronco

REPLACING SPARKBOX IGNITER IN 1975 FORD BRONCO UPGRADE

Re-curving a Duraspark is a way to build additional power and economy. MSD makes a harness that adapts the Duraspark mag pick up right to an aftermarket box such as the 6AL2. Duraspark swaps are easy and can be run by a Duraspark box or an aftermarket box. The system is similar to some aftermarket systems and the control module may be easily swapped. In most cases, the distributor will interchange with the older-style points distributor.

REPLACING SPARKBOX IGNITER IN 1975 FORD BRONCO UPGRADE

The Duraspark II ignition system is a common upgrade for older Ford cars equipped with a points-type ignition. This system is very similar to the systems used at MSD MSD used the Duraspark during R&D. This increased spark capability requires greater separation of adjacent distributor cap electrodes to prevent cross-fire, another reason for its large-diameter distributor cap. All timing is controlled by the engine computer, which is capable of firing the spark plug at any point within a 50-degree range depending on calibration. The distributors in EEC-III (and later) systems eliminate conventional mechanical and vacuum advance mechanisms. A resistance wire is used in the primary circuit. Typically, Duraspark II distributors have both mechanical and vacuum advance mechanisms.Ĭertain 1981–83 models used the EEC-III system, which uses a Dura-Spark III module (brown grommet where wires emerge) and a Dura-Spark II ignition coil. The system consists of a magnetic reluctor and pickup in the distributor, with a separate fender mounted ignition module to trigger the coil. In addition to the color-coding, the modules may have a keyway molded into the electrical connectors to prevent accidental use in the wrong vehicle. They were coded by the color of the plastic wire strain relief, or 'grommet' as it is most often called, in order to make them easy to identify.

Replacing sparkbox igniter in 1975 ford bronco