Electronic Distributor Upgrades are considered the BEST upgrade you can make to your A-series engine — it increases reliability considerably. A Datsun EI dizzy replacement is highly recommended for enhanced reliability + better performance, but a points conversion system may also give better reliability than stock.

Overview

There are many type of Electronic Ignition (EI), but the most common choices seem to be:

$75: #Points Replacement Units that use the original Datsun distributor. Pertronix Ignitor is the most famous

$125+ stock-type high-energy #A-series EI Distributors. Commonly available in USA and in Japan

$50 used Nissan #EI Distributor Conversions (uses simple modifications to fit A-series engine). Commonly available in Australia

$300+ fully #programmable ignition (spark curve and timing)

Benefits

Advantages of electronic ignition include:

Reduced maintenance. No points to wear out, no dwell to adjust. Otherwise for top performance you are supposed to adjust the points every three months/3000 miles

Relibility: Nissan EI is nearly foolproof as failures are extrememly rare. Points will always end up giving you trouble eventually.

High-energy spark -- uses full 12V coil (no ballast resistor), and can drive large gapped spark plugs for better firing

Additionally, Nissan EI distributors have this advantage of using a Larger Cap -- less chance to crossfire (important in humid or dusty climates)

A low-energy EI system won't increase HP over a correctly adjusted points system. However, high-energy systems can better fire lean mixtures (by using larger gap spark plugs) and more easily fire dense charges (think turbo or supercharged engines).

Even a low-enery EI system is better than points, which for top performance requires regapping every 3 months/3000 miles and replacement every year -- See Periodical Maintenance and Lubrication Schedule.

1972 USA Owners manual (Page 32 ... 32):

[[1972#toc|]]

Check or replace breaker points & condensor

Counterpoint

Why go to all the trouble upgrading to electronic ignition?

Points distributors make the same HP as long as you adjust the points every months/3000 mi (5000km)

Points are reliable as long as you replace the points & condenser every 12 months/12000 mi (20,000 km), and keep the cap clean & dry

Point sets are inexpensive. No need to buy a different distributor, just $25 every year or so

Performance

Use an EI coil (designed for electronic ignition) and wire it correctly. See EI Wiring.

When using an EI coil, regap the spark plugs to 0.044 inches for maximum spark performance.

For best performance, get your dizzy recurved. This applies to stock dizzies or EI dizzies. You can do this yourself if you are patient and methodical. Or you can pay a distributor shop to recurve it. In any case, start with Timing.

Question: Is it reasonable to expect a (slight) increase in power?

Answer: No. Just expect top spark performance, but no horsepower increase -- unless you had a spark problem with the old ignition system.

Electronic Ignition will make your engine run at peak spark month after month with none of the losses that points have as they wear. Thus you should get performance equivalent to a newly installed and correctly adjusted set of points. Add to that differing vacuum and mechanical advance curves and the difference is probably a wash. However if your tune was marginal before it may pick up a few HP -- but so would new points and properly adjusted fuel mixture w/o Electronic Ignition.

A-series EI Distributors

USA: B310 Electronic Distributor Swap

USA: B-210 Electronic Distributor Swap

Japan: Sunny Truck Electronic Distributor

Japan: A15 Vanette Distributor

All these are drop-in plug and play distributors for 1974-up A-series engines. Minor wiring changes and matching coil are required, but are very simple to install. Will also fit A10 and early A12s by simple modification of an early dizzy hold-down plate.

EI Distributor Conversions

For converting your A12 to electronic ignition, with some modifications see:

1982 Honda Accord uses Hitachi D4K Distributor, same as A-series, just swap in the longer 1974-up Datsun shaft. See ^POST Thanks

Hall-effect distributor conversion

Australia: E15 Electronic Distributor Swap conversion for A-series

- For early A12, easy to convert

- For late A12 and A14/A15, moderate conversion mods

- FJ distributor is same kind and even closer to A-series

Australia Bosch Bluebird EI

- advanced mods needed

VW Electronic Ignition Conversion

Points Replacement Units

The following are "points replacment" using your existing A-series distributor. You don't get the benefit of the crossfire-free larger caps, and they cost as much as a good used EI distributor. They are often easy to install, but sometimes not if you have an odd factory distributor.

all countries: #Pertronix Ignitor points replacement

Japan: FLTR Full TR (Full Transistor)

USA & EUR: Hot-Spark Ignition points replacement

Crane Cams Crane Ignition points replacments for use with external ignition module

#Lumenition optical trigger conversion for Hitnachi distributors

Pertronix Ignitor

The Ignitor series is a a standard energy module (not a high-energy system) but is well reported on.

Main: Pertronix Electronic Ignition

Hot-Spark

Hot-spark is a standard energy module (not a high-energy system) but seeems to work well.

Main: Hot-Spark Ignition

Crane Ignition

Crane's points replacments for use with external ignition module

Main: Crane Ignition

Lumenition

http://autocar-electrical.co.uk/lumenition

Lumenition optical trigger conversion for Hitachi D4n & D4A distributors

Autocar Lumenition points-replacement

Album 26857 Album 26858

Lucas

Lucas sold aftermarket kits that replaced the points in a standard Datsun distributor.

Album 4233 Album 4235 Album 4234

Programmable

Use a factory distributor with a programmable ignition controller box.

MSD 6AL-2 Programmable about $400 USD

Black Box

Crank Trigger

The following is a premier system, cost around $300 but eliminates all moving parts, and is optionally programmable to custom match a spark curve for the highest performance.

EDIS Coil Pack setup crank trigger system * works with MegaSquirt or MegaJolt controllers

Nissan optical CAS/CPS unit. See D4P

Nissan optical CAS can be used to trigger MegaSquirt ECU for electronic spark control of coil packs. CA18DET and E15ET use similar CAS units.

HEI Modules

An HEI high energy module conversion is useful if you already have an EI distributor, but don't have a control box.

See main articles: * GM HEI * Bosch 021

Mitsubishi J121 "Power Unit" will also work.

Ultra

Keep the points distributor, but use it to trigger a high-performance transistor ignition or even better a CDI ignitor.

Ultra Transistor

Album 16769

http://datsun1200.com/uploads/newbb/174_6908391e70123.jpgPost 499109

ULTRA CDI

Works with standard points distributor.

Model 9150 by Nagai Electronic Instru. Co.

Album 26424 https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/NO9150b.jpg https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/NO9150a.jpg

Ultra CDI 9100 and distributor

Album 25530 Album 25529

ULTRA MDI

Ultra 9702/9702 is a multiple-spark discharge ignition. Works with a standard points distributor to control the coils. Similar to MSD units?

Ultra 9905 M.D.I.-Dual is distributor-less version of MDI.

Identification

Nissan distributors usually have two OEM suppliers:

Hitachi: 日立 (ヒタチ)

Mitsubishi: 三菱　 (ミツビシ)

Use the google Fast Search box on the left side of this page to search for the distributor number. Or use the photos below to identify the generic type.

On the body of the distributor should be the part number. Clean the grease off the side of the body and read the numbers:

Album 4533

Top line: Distributor Model Number (e.g. D4R). This will tell you the kind of EI it is so you can identify the cap & rotor parts.

Lower line: Nissan Part Number. You can look up the exact part number (e.g. "22100-P4000", most are in the club wiki. If not, post your number and we can help identify the exact model.

The same types of EI systems used in Nissan distributors are also used in Honda and Mazda engines. After removing the cap, look at the type of Ignitor used to identify the technology: