Revision as of 08:58, 12 December 2011

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.

1 Benefits
2 A-series EI Distributors
3 EI Distributor Conversions
4 Points Replacement Units
5 Crank Trigger
6 Also See
7 Performance
8 Identification

Benefits

Advantages of electronic ignition include:

No points to wear out, no dwell to adjust. Otherwise you are supposed to change the points & condensor to NEW every 12 months. 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-series EI Distributors

USA: B310 Electronic Distributor Swap
USA: B-210 Electronic Distributor Swap
Japan: Sunny Truck Electronic Distributor
Japan: A15 Vanette Distributor
Japan: FLTR Full TR (Full Transistor)

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 using a hacksaw and an early dizzy hold-down plate.

EI Distributor Conversions

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

Australia: E15 Electronic Distributor Swap conversion for A-series
- For early A12, easy to convert
- For late A12 and A14/A15, moderate conversion mods

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 Electronic Ignition points replacement
USA: Hot-Spark Ignition points replacement

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

Also See

Also see:

GM HEI Ultra-high energy module conversion
- Useful if you already have an EI distributor, but don't have a control box

Performance

When using an EI coil, regap the spark plugs to 0.44 inches for maximum spark performance.

Has anyone dynoed the different configurations?

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.

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. Start with Timing.

Identification

Nissan distributors usually have two OEM suppliers:

Hitachi: 日立 or ヒタチ
Mitsubishi: 三菱　or 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:

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: