The s300 version 3 is a plug in module to the OBD1 factory Honda Engine Computer (not included) which vastly expands the capabilities of the factory ECU. Forced induction, datalogging, real time programming, Bluetooth and engine protection are but a few of the comprehensive s300 features.
Designed, manufactured and assembled in the USA.
There are rectangular frame ECU (US) and square frame ECU (Japan) versions of the s300.
The S300 uses SManager software for tuning and datalogging.
High and low speed 24 x 20 ignition and fuel tables for correct VTEC tuning
Injector size fuel trim
Fuel trim for starting, throttle tip in and individual cylinder trim
Rev limiter with fuel cut or fuel and ignition cut
Launch control with anti-lag
Full throttle shift
Adjustable VTEC window with load and throttle control
Secondary intake runner control
Adjustable idle speed
Adjustable boost cut with hot and cold settings
Closed loop control
Air temperature compensation
Water temperature compensation
Fuel and ignition correction based on gear
A/C shutoff conditions
Three general purpose outputs for nitrous control, quad boost control or similar
The s300 can be updated in real-time with the engine running without affecting the operation of the vehicle. This means that calibrations and changes can be uploaded to the ECU very quickly (2 seconds for a new calibration, a fraction of a second for anything else), without interrupting the operation of the engine. Changes made in the SManager software are uploaded to the ECU instantly and you can see the effect immediately. The s300 does not use an EEPROM or equivalent, so you never need to open the ECU to change chips nor 'burn' ROMs. No EPROM programmer is necessary - you just need a laptop with USB port or Radio technology capability.
The s300 has datalogging to the SManager software built in via the USB or Radio technology. Using a laptop or mobile device the various ECU sensors can be data-logged, viewed, graphed and saved for later analysis.
Additionally the s300 has on board flash memory which allows a datalog to be made without a laptop, for later access and download. Multiple recordings can be made and stored in the s300 for a total of around 120 minutes of total datalogging time. An external switch can be used to start and stop recordings, or engine conditions can trigger recording. For instance in a drag race, the s300 can be set to start recording once the rpm is bought up to near launch rpm and automatically stop once past the traps and the rpm drops below a certain level.
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