Downloads

List of Downloadable Files:

Product Documents

VSSReverseLockoutUnitInstallGuideR1-1 (pdf) shows how to install the VSS/OSS Reverse Lockout Unit in Tremec T56 or T6060 equipped vehicles.
ClockGaugeInstallGuideR1-6 (pdf) shows how to install the ClockGauge and the optional Fuel Pressure Sensor Relocation Kit.
ClockGaugeUserManualR2.1 (pdf) shows how to use the ClockGauge.
SunAMP-45/75AmmeterShuntInstallGuideR1-0 (pdf) shows how to install the Replacement Shunt for a Sun AMP-45/AMP-45B ammeter or Sun AMP-75 ammeter gauge into your vehicle.
T56 Reverse Lockout Timer Installation Guide (pdf) shows how to install the Accutach Co. Reverse Lockout Timer for Tremec T56 and T6060 transmissions.
AirCoreOPGaugeUpgrade0-100InstallGuide shows how to install the Accutach Co. 99-04 Ford 0-100PSI Oil Pressure Gauge Upgrade Unit.
AirCoreOPGaugeUpgrade0-80InstallGuide shows how to install the Accutach Co. 99-04 Ford 0-80PSI Oil Pressure Gauge Upgrade Unit.
AirCoreTempGaugeUpgradeInstallGuide shows how to install the Accutach Co. 99-04 Ford Temperature Gauge Upgrade Unit.
1987-2004 Mustang, and Other Ford Cruise Button Box Install Guide shows how to install a Cruise Button Box in a 1994-2004 Mustang or any Ford vehicle with 1st Gen cruise control button circuit.
1997-03 F150, and Other Ford Cruise Button Box Install Guide shows how to install a Cruise Button Box in a 1997-2003 F150 or any Ford vehicle with 2nd Gen cruise control button circuit.
2005-2014 MustangCruiseButtonBoxInstallGuideR2-1 (pdf) shows how to repurpose the cruise control buttons in your 2005-2014 Ford Mustang.
2010-2014 Mustang Cruise Audio Button Box Install Guide (pdf) shows how to repurpose the cruise and audio control buttons in your 2010-2014 Ford Mustang.
Infiniti350ZRadioButtonBoxGeneralInstallGuideR1-8 (pdf) shows how to repurpose the steering wheel buttons in your 2003-2006 G35 Sedan, 2003-2006 G35 Coupe, 2003-2006 350Z.
GMSteeringWheelRadioButtonBoxInstallGuideR1-2 (pdf) shows how to repurpose the steering wheel buttons in many 1992-2015 GM vehicles.
GMResistorBoxInstallGuideR1-0 (pdf) shows how to re-repurpose some of the steering wheel buttons in many 1992-2015 GM vehicles back to their original OEM Audio functions.
WRX-ImprezaSteeringWheelRadioButtonBoxInstallGuideR1-1 (pdf) shows how to repurpose the steering wheel buttons in 2008-2018 Subaru WRX & Impreza vehicles (and possibly more Subaru models).
ToggleAuxiliarySwitchUnitInstallGuideR1-1 (pdf) shows how to add toggle switch functionality to your steering wheel button box system.
OnOffAuxiliarySwitchUnitInstallGuideR1-1 (pdf) shows how to add on-off switch functionality to your steering wheel button box system
Stewart Warner 760 Series Tachometer Transmitter Installation Guide R1-5(pdf) shows how to use the SW760 Tach Transmitter to make a 1950s vintage Stewart Warner 760 Series tachometer work in a modern hot rod.
LamboTachSignalInverter explains how to use the Lambo Tach Signal Inverter to adapt a positive voltage tachometer signal from a modern ignition system to drive a tachometer from a car with an OEM ignition system that generates a negative voltage tachometer signal.

Steering Wheel Button Box Application Notes

Mustang Rostra Cruise Control System shows how to connect an AccuTach Co. Cruise Button Box to a Rostra universal cruise control system.
Freddy Brown Racing 4STB-E shows how to connect an AccuTach Co. Steering Wheel Button Box to a Freddy Brown Racing 4STB-E AUTO RESET Unit.
87-14 Mustang or 97-03 F150 Coyote/6R80 Swap App Note shows how to use an AccuTach Co. Cruise Button Box and and Auxiliary Toggle Box to control the transbrake and bump functions of a 6RStager box.
How to Control Quick Time Performance Cutouts shows how to use your AccuTach Co.. Steering Wheel Button Box to switch between your muffler and open headers.
Leash Boost/Leash Pulse App Note shows how to use an AccuTach Co. Steering Wheel Button Box to control a Leash Electronics transbrake, bump, scramble boost system plus a line lock system.

General Automotive Information

CamChart App zip file contains a javascript program that will create a traditional cam chart from any set of cam specs. Simply unzip the program files all into the same directory and point your browser at one of the HTML files.
CompRat Compression Ratio Calculator contains a javascript program that will estimate the compression ratio of an engine. Simply unzip the program files all into the same directory and point your browser at one of the HTML files.

Smiths Tachometers

A Gentleman's Guide to Smiths Tachometers V4.1 contains an amazing amount of information about Smiths tachometers. Written by Alex Miller, it is a must read for anyone interested in vintage Smiths tachometers.
Alex Miller's Gen. 4 Smiths Tachometer Document, which does a deep dive into the IC-based designs with a thick film PCB.
Mark Olson and Alex Miller's Gen 0.5 Smiths Tachometer Module Analysis , which does a deep dive into Electronics module in Volvo P1800 Jensens of the early 1960s.

Sun Tachometers

Sun ST-601 Tachometer Reverse Engineering Report contains an analysis of the Sun Model ST-601 Tachometer.
Sun SST-802 Tachometer Reverse Engineering Report contains an analysis of the Sun Model SST-802 Tachometer.
Sun SST-801 Tachometer Reverse Engineering Report contains an analysis of the Sun Model SST-801 Tachometer.
Sun SST-306 Tachometer Reverse Engineering Report contains an analysis of the Sun Model SST-306 Tachometer.
Sun SST-802-2 Tachometer Reverse Engineering Report contains an analysis of the Sun Model SST-802-2 Tachometer.

Stewart Warner Tachometers

289CobraTachReverseEngR5 contains an analysis of the Stewart Warner tachometer used in later 289 Shelby Cobra sports cars.
Model970TechReverseEngR1 contains an analysis of the Stewart Warner Model 970 tachometer and its associated 990B Ignition Monitor.

Dixco Tachometers

DixcoTachWriteUpV1-5 contains an analysis of some vintage Dixco Model 47, Model 97 and Model 797 tachometers.

European Tachometers

LamboTachAnalysis contains an analysis of the Veglia-Borletti tachometer out of a 1987 Lamborghini Jalpa car.

Mustang, F150 and General Ford

94-94ClusterPM shows how to prevent a catastrophic failure of your isntrument cluster.
94-98ClusterPinouts shows the differences between instrument clusters from 1994-1998. This information can be used to do instrument cluster swaps between years. Rev 2.1 includes wire colors and pin swap maps.
HowToDepinAndRepinClusterConnectors shows how to adapt your car's wiring harness to accept an instrument cluster from another year donor car.
99-04ClusterPinouts shows the differences between instrument clusters from 1999-2004.
03MustangDefrosterSwitchHack shows how to swap a 99-00 cluster into an 01-04 car.
MeterMatchMustangHowTo shows how to upgrade your 79-98 Ford oil pressure gauge to be a real oil pressure gauge rather than an idiot light in gauge form.
TestingTachSpeedoR1 explains how to use simple, low cost tools to check the calibration of your Speedometer and tachometer.
OdometerSwapHowTo shows how to swap odometers between 94-98 Mustang clusters.
V8TachInV6Car shows how to convert Mustang instrument clusters so a V8 tachometer can be used in a V6 car.
Convert a 94/95 V6 Instrument Cluster PCB for use in a V8 Car tells you how to modify the flexible cluster PCB if you need to replace the PCB and can't find one from a V8 car.
99-04ClusterCalibration shows how to calibrate the needles on 99-04 Mustang instrument clusters.
VSSCharacterization details how a VSS sensor works
TransmissionSwaps-HowToHandleVSSvsOSSSignals details the differences between OSSs & VSSs and how to handle swaps
03/04 Mustang Cobra Vacuum System documents the Terminator vacuum system
96-97 Ford Mustang Interior Fuse Box Anatomy explains the fusebox and shows how to add one more circuit
IMRCAnatomyR1-2 explains how late 1990s Ford Intake Manifold Runner Control actuators work and how to test and repair them
IMRCDeleteRelayCircuitR1-0 explains how to make a simple relay circuit that will fool the PCM into thinking you still have IMRCs if you have deleted them.
96Mk8IMRCDeleteAnalysisR1-2 explains how to use a standard automotive relay to fool the 96 Lincoln Mark 8 PCM into thinking you still have IMRCs if you have deleted them.
Anatomy of a 96 Mustang CCRM explains what circuitry is in the CCRM and gives hints on how to test and fix them.
Coil Drivers of a 98 Mustang PCM explores the drive capacity of the coil driver transistors.
03/04 Cobra Engine Harness Swap explains how to swap a Terminator motor harness into a 96-98 Mustang.
How to Wire a Dallas Mustang Speedcal into a 94-98 Mustang
Diagnosing a 94-98 Mustang Instrument Cluster before sending it in for service

88-91 Honda CRX/Civic

88-91 Honda CRX/Civic Interior Fuse Box Anatomy Document is a detailed analysis of an 88 Honda CRX interior fuse box in pdf format. It should also apply to all 88-91 Honda CRXs and Civics.
88-91 Honda CRX/Civic Quaife Quick Ratio Steering Rack Upgrade is a How-to document that shows how to rebuild an 88-91 Honda CRX-DX steering rack with a Quaife quick ratio rack and pinion.
How to Mount a Comp Cams Degree Wheel to a Honda B-series Crankshaft (pdf)
How to Wire up Honda CRX Power Door Functions (pdf)
Test 88-91 CRX Tachometers (pdf)

Vintage Jaguar

Analysis of a 1974 Smiths Seat Belt Module (pdf) In 1974, the US federal government mandated that cars' starters be disabled if the driver or a passenger in the car are not belted in. The unpopular mandate was dropped by 1975, so only 1974 model tear cars came with such equipment. Smiths designed a seat belt module that was used in the 1974 Series-3 E-type V12 "Jaguars as well as Triumphs, and some other British cars.
1974 Jaguar Oil Pressure Gauge Circuit Analysis (pdf) Explains how the oil pressure sensor and gauge work in vintage Jaguars.

Chevy C10

73 Chevy C10 Fleetside Fuel Filler Neck Mod. (pdf) We fabricated a new fuel filler neck for a 1973 Chevy C10 fleetside pickup in order to fix the problem where modern gas pump nozzles make it impossible to quickly fill the tank without spilling a lot of fuel in the process.

Obsolete Products

(Obsolete Product) Accutach94-98ClusterCalibratorKit (zip) User Manual
(Obsolete Product) Serial port-based Smiths (Jaeger) Tachometer Calibrator (pdf)
(Obsolete Product) Original version of the OSS/VSS Reverse Lockout Unit (pdf) Install Guide