EIGHT YEARS AGO, MITSUBISHI’S EVOLUTION X ASSUMED the duty of carrying the performance torch for the marque as its flagship performance platform. Powered by a 291 horsepower, turbocharged 4B11 engine, the EVO X proudly continuedthe Evolution legacy with the latest Super-All Wheel Control (S-AWC) AWD system and for the first time in the USA, Super-Active Yaw Control (S-AYC). Mitsubishi also offered its EVO X MR with a new transmission solution, the Twin Clutch-Sportronic Shift Transmission (TC-SST). This quick shifting gearbox offered rapid gear changes at the press of a paddle.

Text and Testing by Richard Fong // Photos by Richard Fong and Cameron Parsons

DSPORT Issue #159

PERFORMANCE: Increase Peak Horsepower +41.91 WHP Increase Peak Torque +59.6 lb-ft Peak Gain of +41.11 WHP @ 5,300 RPM

TESTED: Cobb Tuning Accessport ARK Design Superflow Exhaust AEM Induction Intake System

The test platform for this Test & Tune is a 2014 Evolution X MR Touring Edition with only 15,000 miles. This daily driver needed to continue to serve as a commuter while delivering elevated performance over stock. Although the torque capacity of the TC-SST transmission has raised concerns among enthusiasts, our goal is to evaluate upgrades that will raise the MR’s output within the known abilities of its driveline. For this first Test & Tune installment, we looked at the three easiest and most popular modifications enthusiasts choose for the EVO X, an ECU flash solution, an exhaust and an intake.

Fongs Evo X Engine Bay


Factory engine management systems have proven to be competent at higher engine output levels as long as there is access to refine the tune. There are a variety of open source solutions available along with proprietary tuning so wares on the market. Typically, access to the factory ECU requires a cable plugged into the OBD-II port,a laptop and a capable tuning specialist to make adjustments to the tables. One of the easiest portals into the factory ECU for the D.I.Y. enthusiast is the Cobb Tuning Accessport. Since Cobb Tuning has already developed both performance and fuel economical maps (the EVO X is not known for being the most fuel eefficient) we loaded the predesigned calibrations by way of a Cobb Accessport (p/n AP3-MIT-002) aafter each modification. On the Cobb Tuning website, the appropriate maps were downloaded to our desktop computer and then uploaded to the third generation Accessport (V3) by way of Cobb’s Accessport Manager so ware (both PC and MAC versions are available). Since we’re located in California, our Premium Unleaded pump fuel is restricted to 91 octane and jammed with special formulation guidelines. Therefore, we chose the special “Arizona/California/Nevada 91” (ACN91) calibrations for our test vehicle.

Fongs Evo X Cobb AccessPort

The Cobb Tuning Accessport can serve as a multi-function display capable of monitoring up to six different variables on its color screen. It can also be used to identify and clear engine trouble codes.

The Accessport menu is easy to navigate and makes map changes, performance measurements, datalogging, diagnostics and monitoring a simple process.

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