Fueling
Air-Fuel Ratio (AFR) Guide for Honda Tuning
An introduction to Air-Fuel Ratio (AFR) in internal combustion engines, explaining stoichiometric targets, rich vs. lean...
Fuel Injector Offsets Database
A comprehensive database of battery offset (dead time/latency) tables for OEM and aftermarket fuel injectors.
High Impedance Injectors
Technical guide to high-impedance (saturated) fuel injectors on Honda PGM-FI engines, explaining their electrical proper...
Injector Sizing
How to size fuel injectors for your power target.
Introduction to Honda ECU Tuning
An introductory guide to fuel and ignition tuning on Honda ECUs. Learn how to calibrate air-fuel ratios, timing advance,...
Low Impedance Injectors
Technical guide to low-impedance (peak-and-hold) fuel injectors, inline resistor boxes, and converting between injector...
MAP Sensor
The Manifold Absolute Pressure (MAP) sensor measures engine vacuum and boost, acting as the primary load input for Honda...
Oxygen (O2) Sensor
How the stock narrowband oxygen sensor works, troubleshooting O2 sensor CELs, and converting between 1-wire and 4-wire s...
Tuning Honda ECUs for Smog and Emissions Inspections
A comprehensive guide on adjusting fuel and ignition maps in your Honda ECU ROM to pass vehicle tailpipe emissions and s...
Understanding ECU Fuel and Ignition Maps
An introductory guide explaining how fuel and ignition tables (maps) are structured and interpreted inside Honda ECU ROM...
Wide Band O2
How wideband oxygen sensors differ from narrowband sensors, integration with aftermarket controllers, and datalogging se...