ECUHost & Teensy June 23, 2019 | 3 Comments ECUHost OS Some people have been asking what is ECUHost? The simple answer is ECUHost OS is an automotive DIY operating system targeted at ARM Cortex-M micros, and the ECUHost V1.4 PCB is an example hardware module for the OS to run on. The heart of the ECUHost V1.4 PCB is the NXP MK60 micro… Read More
DIY ECU Reprogramming by CAN June 2, 2019 | Leave a comment Background Modern cars contain many electronic control units (ECUs) and they are usually connected via CAN bus. Updating the ECU firmware by CAN has been typical since the 2000’s and the CAN protocol used is generally Unified Diagnostic Services (UDS) as defined in ISO14229-1. UDS Programming The protocol defines many services that are… Read More
Rabbit ECU Turbo Project April 30, 2019 | Leave a comment GM Family 2 Engine Turbo Project The Family II is a straight-4 piston engine that was originally developed by Opel in the 1970s, debuting in 1979. The project engine is a Holden built C18LE, a variant with 8-valves driven by an over-head cam, with a cast-iron block and alloy head. The C18LE has a compression ratio… Read More
MAP or MAF with Rabbit ECU April 4, 2019 | Leave a comment It’s all about the airflow! Rabbit ECU controls the fuel flow into your engine by way of first calculating the air mass flow through the intake ports. Dividing this air mass flow rate by the target AFR gives the desired fuel flow rate. This is in turn divided by engine speed and injector flow… Read More
Beating The OBD Using Rabbit ECU May 20, 2018 | Leave a comment Piggy-back Install This post is about the Rabbit ECU piggy-back install for the Commodore/Chev SS L98 engine with CAN bus. The Rabbit ECU takes full control of fuel and timing by way of a separate injector and igniter wiring harness. The OEM connectors and removed and cable-tied back to the OEM harness. There are a… Read More
Sequential Injection & Ignition Using ECUHost & Rabbit ECU April 18, 2018 | Leave a comment Crank Triggers This post is about how sequenced outputs for injection and ignition are set up in the Rabbit ECU. For a basic install, it is very likely that the Rabbit ECU can use the stock crank trigger whether it is variable reluctance, Hall Effect or optical. A crank trigger alone can get you up… Read More
Classic Car EFI Tuning With The GP-meter 6.0 February 26, 2018 | Leave a comment Bosch Jetronic Classic car EFI systems like Bosch Jetronic came about before micro-processors were developed for use in vehicles. Jetronic is commonly found in EFI vehicles from the early 70’s up to the mid 80’s. These systems are simple and reliable. But back in the 70’s automotive systems weren’t designed to be connected to diagnostic… Read More
Programming the Arduino Due with BOSSA January 14, 2018 | 1 Comment Shumatec BOSSA Not everyone wants to tinker with the source code of the Rabbit DIY ECU. You don’t need to be a programmer to get your EFI project up and running easily, there are firmware binaries you can download then transfer to the Arduino Due. This process of programming the firmware binary takes only a… Read More
Air Flow Meters – Everything You Need To Know For DIY EFI December 10, 2017 | Leave a comment Air Flow Meters – DIY The basics Air Flow Meters (AFMs) have been widely used in EFI systems since the 1970’s. The simplest AFMs are basically a hinged flap with a spring return. More air pushing past the flap causes more opening of the flap, and a change in voltage from a potentiometer attached to… Read More
CAN – What You Need to Know for DIY EFI December 5, 2017 | Leave a comment Rabbit DIY ECU – Connecting to Vehicle CAN CAN bus is found in every road vehicle sold in Australia from 2006, along with the OBD2 protocols that have standardised vehicle diagnostics. The OBD2 protocols (also known as SAE J1979) provide a common language used by scan-tools to communicate fault codes and provide information useful for… Read More