Ads
related to: hei distributor pickup coil- All Categories
Visit all Our Categories
CASE Construction parts
- All Equipment
View Model Assemblies
CASE Construction Models
- All Categories
holley.com has been visited by 10K+ users in the past month
ebay.com has been visited by 1M+ users in the past month
summitracing.com has been visited by 100K+ users in the past month
Search results
Results from the WOW.Com Content Network
A predecessor system called "Unitized Ignition" was optional on 1972 and 1973 Pontiacs. [citation needed] Most—but not all—HEI systems have the ignition coil mounted in the distributor cap. A control module and magnetic pickup are mounted in the distributor, in place of a conventional ignition system's breaker points and condenser.
The system consists of a magnetic reluctor and pickup in the distributor, with a separate fender mounted ignition module to trigger the coil. Typically, Duraspark II distributors have both mechanical and vacuum advance mechanisms. Certain 1981–83 models used the EEC-III system, which uses a Dura-Spark III module (brown grommet where wires ...
The 1975 high energy ignition (HEI) provided spark to the spark plugs with minimal maintenance and increased power. The larger distributor cap also provided better high-RPM performance by decreasing the likelihood of the spark conducting to the wrong terminal. The 250-cubic-inch in-line six of 105 hp (78 kW) was offered as the base engine.
Since the early 2000s, many cars have used a 'coil-on-plug' direct ignition system, whereby a small ignition coil is located directly above the spark plug for each cylinder. This design means that high-voltage electricity is only present in the small distance between each coil and the spark plug.
The ignition coils for these can be combined into a single casing (a coil pack) and located away from the spark plugs; however it is increasingly common for coil-on-plug systems to be used, whereby the individual ignition coils are small units attached directly to the top of each spark plug. An advantage of coil-on-plug systems is that in the ...
The coil-in-cap HEI distributor was retired, and an all-new electronic distributor design was used. The intake manifold to head bolt pattern was redesigned to improve gasket integrity—four of the center intake manifold bolts were drilled at 72° instead of 90° for the cast iron cylinder heads. Changes to the valve covers were also made.
Ads
related to: hei distributor pickup coilholley.com has been visited by 10K+ users in the past month
ebay.com has been visited by 1M+ users in the past month
summitracing.com has been visited by 100K+ users in the past month