What is a TMX power pack..?
Tokyo Motorsports have developed a range of power upgrade kits for the Evo X. Known as the ‘TMX Series’ these kits have been developed to target a specific power output. There are three levels of modification; TMX-320, TMX-360 and TMX-400. In each case the number refers to the power output of the engine in bhp (break horsepower).
The idea:
We wanted to take the guesswork out of modifying the Evo. The Evo X is a totally new model and shares very few components with its predecessors. New chassis, new engine, new transmission and new engine ECU meant that we had to start with a completely clean sheet with our power upgrade packages. The new engine (the aluminium 4B11) with its dual MIVEC and titanium turbine turbo afforded us with a much better starting point. The stock car was considerably more powerful than the earlier 4G63 and the overall result was much better with fewer parts.
Boost control:
The engine ECU on the X is much more advanced than that of the earlier models. Boost control, although tricky to set up initially, was found to be stable and could be relied upon to hold higher boost levels. Several configurations were considered for boost control but we settled upon ECU controlled boost with the addition of two important features; a modified boost tracking strategy, integral to the ECU, and an electronic map switching capability that allows the driver to switch between two pre-configured power settings.
Same kit for all models:
Each kit is compatible with all models of Evo X, whether you have a GSR, MR, SST or five speed manual. The manual transmission cars give marginally better power figures from what we have seen; the SST’s twin clutch being something of a limiting factor when it comes to torque. All of our research and development has been carried out on our own 2009 Model SST Evo X. Having a development car at our disposal has proven to be invaluable. Our development will continue and we will be incorporating the latest updates as they become available.