Reply To: Distributor cap ID

[Gregory Long]

Both Delco and DeJon were suppliers to Pierce Arrow in the ’20’s

The base of the earlier magnetos, then the Dual Delco, and this DeJon distributor use the same bolt and base pattern for mounting to an engine. Sometimes there was a spacker to adjust the height of the drive shafts.

This single distributor, designed to fire two spark plugs per cylinder was the last design used to supply spark to the Dual Valve engines, which had two spark plugs per cylinder.

The common mounting bolt pattern allows for a dual Delco distributor to be mounted on an engine originally equipped with a Magneto, or a combination Magneto/distributor. A dual coil, dual points setup runs quite a bit better than a magneto on the early engines.

Greg