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Hondata S300 Version 3 Tuning Software & Packages

Available for Order



We are proud to offer Hondata's top of the line tuning products like the Hondata S300 V3 to our valued customers. The S300 is one of the most advanced OBD1 Honda / Acura tuning systems on the market. It offers superior tunability with forced induction support, datalogging, boost control capabilities, and so much more. Below is a brief summary from Hondata. If you have more questions on whether or not this system is right for you, please don't hesitate to contact us.

Each Hondata S300 system sold by us at SpeedFactory Racing has it's own unique serial number from Hondata. This not only verifies it's authenticity, but is extremely useful for recovering your Hondata unit in the event of theft.

NOTE: We always recommend using the latest version of Smanager with the S300 System. You can download Smanager for free on the Hondata website.

* Fits the following OBD1 USDM ECU's: P05,P06,PR4,P28,P30,P61,P72,P75

**Please allow 72hours for your order to process and ship**

Main features:

Fits inside the ECU
Made in USA
Built-in Bluetooth compatability
Works with Hondata Mobile iOS and Android app
USB connection for speed and compatibility
SManager Windows based software for parameter & table editing, calibration uploading and datalogging.
Real-time updating of ECU
Built in calibrations for common engine combinations
Built in datalogging to a laptop
On board datalogging memory (2 MB memory, 20-60 minutes datalogging)
Adjustment for different sized injectors, with overall fuel trim.
Configurable for any MAP sensor (to at 5 Bar and above)
TPS based table lookup for ITBs
Engine protection from over boost.
Expanded fuel and ignition tables, both in rpm and load, to 60 lbs boost and 11,000 rpm (these are not the upper limits)
Launch control with anti-lag
Full throttle shift
Three multi purpose outputs for nitrous control or similar Supports lambda tracing from a wideband o2 (PLX wideband recommended)
PWM output for boost control
Dual tables for high/low octane calibrations etc.
Two analog inputs for wideband, EGTs etc.

SManager editing software features:

Compatable with Windows XP, Windows Vista, and Windows 7
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
MAP sensor type and calibration
Adjustable boost cut with hot and cold settings
Shift light
Closed loop control
Air temperature compensation
Water temperature compensation
Fuel and ignition correction based on gear
A/C shutoff conditions
Closed loop
Three general purpose outputs for nitrous control, quad boost control or similar
On board datalogging trigger conditions

NOTE: The s300 uses different connecting pins in the ECU from the s100/s200, and also has a slot cut in the side for the USB connector, so the ECU must be modified for use with the s300. The s300 is made to fit in a full frame ECU case (US and most markets), so will not fit in a JDM ECU case.

USB Connection:

The s300 uses a high speed USB connection for both programming calibrations and datalogging. No more USB/serial connectors!

Real-time Update:

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.

Note that this the only true real-time update available for Honda ECUs. Any portion of the ECU (including the whole ROM) may be quickly updated with the engine running, without the engine stalling or going into limp mode.


The s300 has datalogging to the SManager software built in via the USB port. Using a laptop the various ECU sensors can be datalogged, viewed, graphed and saved for later analysis.

Additionally the s300 has on board flash memory which allows a datalog recordings to be made without a laptop, for later access and download to a laptop. Multiple recordings can be made and stored in the s300 for a total of around 40 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.

MAP Sensor Compatibility:

Any linear MAP sensor can be used, using a scalar and offset to translate the MAP sensor characteristics into pressure. Popular MAP sensor settings are built in for ease of setup. To do this you will need the map sensor calibration numbers from the manufacturer of the sensor. For a trouble free installation, please take a look at the SpeedFactory 4 bar map sensor.


Parts sold by SpeedFactory Racing, whether specified or not, are sold for off-road use only. These products are intended for racing vehicles which may never be used on a public road. By purchasing any aftermarket performance product from SpeedFactory Racing, the customer takes full responsibility for any use, and/or misuse of the product and agrees that SpeedFactory Racing holds no responsibility for any consequences, legal or otherwise, of such use and/or misuse.

All performance modifications and installations are at the customer's own risk. SpeedFactory Racing holds no responsibility either implied or otherwise for mechanical, electrical, or other failure or when using any aftermarket performance products.

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