Technical articles




Technical Articles
These collection of articles are all written in house unless otherwise noted. They have been written to be the most unbiased and accurate as possible. Mistakes and mis-information are inevitable so if anything incorrect is found then please send a message.  Contributions are welcome as are suggestions for further articles. Click on the contact tab to do so. Click on each icon to read the individual articles.

Note: Many articles are still being written/edited/uploaded. It takes an obscene amount of work to put together a site like this one so it will take time.





Revised cooling guide Complete 20V RWD Cooling Guide:

A massive guide covering multiple options in the cooling system conversion on a 4age 20V engine. Has extensive details on the merits and downsides of multiple options of every component design in a revised cooling system.
Revised cooling guide Coilpack Info Guide:

The connection, fitment and use of Toyota's plug on coils.
R31 diff conversions Skyline R31 diff conversions:

Tips and tricks in fitting a Skyline solid diff to other cars.
Working with VVT Working with VVT:

All about the Variable valve timing that comes with the 4age 20V engine. Covers use with an aftermarket ECU, tuning, removal, etc..
Spigot bearings Spigot Bearings:

Working with Spigot bearings on Toyota AE and KE models. A simple article about what type, the install, removal, etc..
20v rwd conversion 20V RWD conversion:

From the basics to the finer details; a guide on the various changes that need to be made to a 20V engine to convert it into rear wheel drive form. 
4age flywheels Toyota A series flywheels:

A chart of flywheel specifications for 4A and 7A engines.
Part numbers Aftermarket Part Numbers:

A list of part numbers to suit AE's and KE's for available aftermarket service parts as an alternative to a genuine option.

Intake Tuning guide Intake tuning for multiple throttles:

A broad article from theoretical principals to filtrations and much in between.
20v differences 20v differences:

An article showing  the main changes between the earlier 4AGE 20v Silvertop and the later Blacktop engine.
Multi-link tuning Multi-link Rear Suspension Tuning:

Theory and practice of adjusting the multi-link rear suspension arms and mounting points. Also covers aftermarket parts available for the purpose.
Wheel studs Interchangeable Wheel studs:

Wheel studs available aftermarket or from other models that can be interchanged with the original Toyotas studs to change their length.
Relay upgrade for a starter Relay Upgrade for a Starter Motor:

If your car has a good battery but still makes a clicking sound instead of starting then chances are you need to do this simple upgrade.
Resultant Compression Ratios Compression ratio chart:

A chart of the resulting static compression ratios with various 4A and 7A engine piston/head/crank combinations.
Working out compression ratios Calculating Compression Ratios:

How to work out various changes to the static compression ratio with alternations like different head combinations, longer stroke, larger stroke, etc..
Hyundai radiator install Hyundai Radiator Install:

A pictorial guide on how a Hyundai Excel radiator can be installed into an AE86 with a 4ac engine. It can however be applied to other models directly like a KE70 or AE71.
20v camshaft choice Selecting 20V cam-shafts:

Examining the various cam-shaft choices available for a 20V engine and what is best for the engine builder.
Aftermarket ECUs Running a 20V with an aftermarket ECU:

Brief information on running a 20V 4age with an aftermarket ECU.
AE101 Silvertop diagram AE101 4age wiring diagram:

Official wiring diagram for a Silvertop sourced from Toyota and translated by an unknown individual. 


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