ELECTRONIC TUNER TOOLS (wide band)

LM-1: Digital Air/Fuel Ratio Meter

Tuning an engine for maximum power previously required long trial-and-error sessions on a dynamometer. With the LM-1, precise AFR measurement allows the user to correctly adjust many variables- including carburetor jetting, fuel injection, turbo fuel curves, etc.- without long and expensive dyno sessions. The meter's digital signal processing technology provides data on exactly how rich or lean an engine is running at any load. The LM-1's self-calibrating circuitry also compensates for changes in temperature, altitude, and sensor condition.

The instrument can sample and store the air-fuel-ratio and the other sensor data internally in operation for later analysis on a personal computer. At a sampling rate of 12 samples/second the instrument can store up to 44 minutes worth of data in non-volatile memory. The data can be downloaded to a personal computer using a standard serial port and viewed/analyzed by the included software or any standard spreadsheet program:

LM-1 Basic kit (top photo) - includes a Bosch wide-band oxygen sensor (LSU4.2) with 10' cable, 10' cigarette-lighter power cable, serial cable for PC connection, 9V battery, exhaust bung & plug, CD and manual.
Now available packaged with either the RPM converter or AuxBox accessory!

LM-1 Dyno kit - includes an exhaust clamp in addition to everthing the Basic kit contains, and utilizes an AC adapter instead of the cigarette-lighter plug.

The kits ship with a Bosch sensor, however, it can also function with other wide-band sensors, including Honda/NTK and VW sensors.

Manufacturer: Innovate Motorsports

AuxBox (LMA-3)

The AuxBox attaches to the auxiliary input of the LM-1 and allows a user to log and analyze 5 critical engine metrics in addition to the air/fuel ratio native on the LM-1. The AuxBox makes the LM-1 into a complete tuning kit, allowing the user to capture, view, and analyze data on all 6 channels that the LM-1 can log internally. Correlating AFR, RPM, MAP, and CHT, for example, is essential when tuning piggy-back fuel controllers, ECU programmers, aftermarket ECUs, or racing carburetors.

The 5 internal sensors are intended for capturing Manifold Air Pressure (MAP or Boost), Cylinder Head Temperature (CHT) or Exhaust Gas Temperature (EGT), RPM conversion (from a tach signal or inductive clamp), Acceleration, and Injector Duty Cycle (or Dwell). The internal MAP sensor is a 3-bar absolute pressure sensor, providing accurate data up to 44.1 PSIA. The temperature measurement circuit features a K-type thermocouple. The internal accelerometer features 2 axis measurements for a variety of mounting options.