Tech Articles

SAFC Boost Mod Convert your Gen II SAFC to adjust fuel by boost rather than throttle position.

By Robert Pina

ST165 VPC Notes Help on installation and wiring of an HKS VPC into an ST165.

By Robert Pina (Helped by Justin Smallen)

Cool Air Temp Mod The latest in our series for you do it yourselfers.  This is mainly for those in a warm climate.  This will make your air temperature gauge inside the AFM (ST165/ST185) always read 68 degrees F.  During the summer if you let your car idle or sit at a red light the Air Flow Meter will heat soak and the temperatures read by the sensor are extremely high.  This causes the computer to retard timing and hinder your performance.  Even once moving and colder air hits the sensor, it takes time for it to read normally again.  This way it reads a colder signal all time time.

By Robert Pina

How to install a manual boost controller (MBC) Here are what you need to know about installing a manual boost controller (MBC) on your alltrac. By Gary

Greddy BCC/HKS FCD/Zenier install notes Some diagrams and pin outs that will help you get that FCD installed easily.
By Robert Pina

Adjustable Fuel Cut Mod Originally created for an MR2 3sgte, will work just as well for All Trac.  An adjustable fuel cut will still allow you to run all the boost  you like, but still have a fuel cut at some point just incase something goes terribly wrong.  This could save your engine!
By Bill Wotschak

Fuel Pressure Up Mod This will raise your fuel pressure without a fuel pressure regulator, give u a little more acceleration off the line, and give you almost 2 more psi.  All you need is a 5-6 feet of high quality vacuum hose.  The link above will give you a poorly drawn diagram.  But enough to give you the idea.
By Robert Pina

Add Intercooler Fan (ST185) An informative how to on getting your i/c cool.
Written by Dennis Heath
Courtesy of Gt4 List

Cold Air Custom Intake (ST185) The steps of a custom intake box and battery relocation to the rear...
Written by Matthew Crawley

Adding a pressure switch to TVIS (ST185) This allows the TVIS butterflies to be opened up at a certain PSI level
Written by Albert Bult

Disable the Turbo VSV This allows you to run an electronic boost controller properly.
Written by Robert Pina

EBC (Electronic Boost Controller) Installation Diagrams These are original documents about how to install an HKS EVC in an All Trac.  It specifies ST165, but ST185 would be a similar install.  The diagrams prove useful for all electronic type Boost Controllers.  Page 1, Page 2, Page 3, Page 4

How to install a Greddy TD06SH Turbo Kit An excellent step by step guide on what the manual doesn't tell you.

Written by Marc Summers

Tips on installing an APEX'i S-AFC Complete wiring diagrams and a few key pointers on Super AFC installation.
Written by Robert Pina

Convert your sealed rear struts to insert type cartridges A simple writeup on the procedures of converting your sealed struts into replaceable cartridge type.  Also there is notes on a coilover spring conversion from Ground Control
Written by Matt Yates

Modify your Bailey BOV to be stronger The Bailey valve comes with only one setting.  If you find this is too loose, here you can modify the tension.

Written by Ivan "Saffo"

A/F Gauge Installation Some wiring diagram and tips on what to use for your a/f gauge voltage/reading.

Written by Robert Pina

Shimless Valve Bucket Conversion How to convert your shim style bucket to a newer lighter design for ultimate revving!

Written by Ross Machine Racing

Do you have a modification you would like to share? Email us a link to your mod page OR send an html file that we can host here. Your write up should include pics and instructions.

General Car Mod Links (Not All Trac Specific)

Make your own A/F Gauge

Make your own Solid Motor Mounts

Make your own hood vent

Make your own Injector Duty Monitor