Vehicle Make : Mitsubishi
Vehicle Model : Lancer EVO X
Engine Model : 4B11 DOHC 16v Mivec Turbo
Transmission : SST
Location : Perth, Western Australia
Dyno Type : Dyna Pack Hub Dyno
ECU : Reflashed Factory ECU
Brief Mods : Full Exhaust, Perrin Filter, Stock Turbo
Other Notes : This vehicle came to RPW for OpenECU tuning after seeing the results from other EVO X vehicles we had tuned, this being the brother of one of the other EVO X vehicles we recently finished. The vehicle came to us already fitted with a Perrin Cat Back 3" system. RPW Sourced and fitted a TurboXS Stealth back system to replace the front pipe and cat converter. This was fitted up and the vehicle placed on the dyno.
From there a baseline run was done as a starting point and then the vehicle was flashed with our starting Stage 1 Tune. Attempts were made to alter the boost level with the factory boost system only but we found that with the combination of the full 3" exhaust, the boost curve was still wavy like the factory system and we could not tune it out. Instead a boost pill upgrade was performed and then the boost curve was altered to smooth it out. By using the boost pill this enabled us to have a lot of reserve with only limited use of the passive secondary valve to smooth out some dips.
The tuning resulted in a peak power of 299hp at 6000 rpm with the obvious increases in torque. Boost came on much earlier with the mivec map changes, with the coresponding torque improvement. The vehicle was excellent to drive on the road and throttle response was amazing.
The vehicle made an easy 310hp at some points during the tune but to ensure that the vehicle woudl continue to run happy on pump fuel, timing and boost was pulled from 5000 rpm on to ensure the vehicle was not over stressed.
We fully expect the brother with the other evo (Which had the 287hp tune done on the smaller exhaust) to come back for a full exhaust upgrade and a retune. We did a comparison on the two and the larger exhaust produced boost much easier and sooner, but the torque difference was significant.
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