Magnetic Trigger Upgrades For Delco Breaker Point Ignitions

The Delco Remy Breaker point type distributor used by GM for several years, and used by AMC for a few years, and is the subject of this article.
This distributor will fit most applications if you don't intend on operating over 3,500 RPM for long periods of time, or intend to exceed 7,500 for short periods of time (like drag racing).

THE PLAN:
1. To upgrade the Delco breaker point type distributor to electronic trigger.
2. To upgrade the distributor cap and rotor so the ignition system can handle todays High Energy Ignition system voltage.
3. To correct the sloppy factory timing and deliver the spark energy to the correct plug wire at the correct time.

GOOD POINTS:
1. The Small Diameter of the Delco distributor is a big plus in vehicles that have fire wall clearance problems.
2. It makes a good intermediate performance distributor.
3. It is easier to upgrade than the GM style HEI, and can be made to out preform all GM HEI's and all but top of the line aftermarket distributors for less than a quarter of the cost.
4. Easy to rebuild, and parts are very plentiful.
5. Discount parts store rebuilds (ready to upgrade) still run around $40.00.

BAD POINTS:
1. While easy to upgrade, not all upgrade parts are available at discount auto parts stores.
2. You have to be pretty handy with a Dremel Tool or hand files.(but only once, you are modifying a permanent part)

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Start with one Delco breaker point ignition is relatively good shape,...

Add in one Magnetic Pickup and Reluctor From a '76 Chrysler New Yorker...


Attach the Chrysler Magnetic Pickup to the Delco Breaker Points Plate...


Grind or File out the reluctor to fit over the Delco Breaker points cam lobes...
The reluctors from a '76 Chrysler New Yorker are about $5 each, so you can afford to make mistakes.
You are looking for an interference fit, meaning you want the reluctor to fit very tightly.
Most reluctors are compressed powered metal, so you can crack them pretty easily. Take your time and use a rat tail file, and get the fit good and tight...
If you are a little oversized, scratch up the points lobes, clean everything with alcohol or MEK, and use J.B. Weld to hold the reluctor in place.
Remember, you are looking to keep the reluctor as centered as possible, so keep your walls the same thickness.

Don't forget the 'LockTite Red' when you install the new reluctor over the cam lobes for the last time.
J.B. Weld works good, and so does silver bearing solder.
If you don't use something, you will find the reluctor slipped down and messing things up...

This is what the whole mess looks like when it's done...