The Fiesta ST is undoubtedly a phenomenal hot hatch and for the first time, power hungry owners that want to take their ST's beyond standard, or mountune's Ford-approved mountune Performance MP215 upgrade can do so with the mountune Racing MR230.
The mountune Racing MR230 upgrade takes power output to 230PS, whilst torque increases to 340Nm. This increase in power output drops the 0-60mph time by a second to just 5.9-seconds.
What’s In The Upgrade? The kit utilises a host of existing mountune Performance parts (many of which do not affect your base vehicle warranty), allowing an easy way to upgrade in a modular fashion. The exception being the downpipes / sportscat which, as well as being an MR product, also requires a supporting calibration to prevent MIL illumination.
• Low-loss dual-entry airbox with secondary feed
• mountune high-flow panel filter
• High-flow 3" down pipe with 200-cell sports catalyst
• High-flow 2.5" bore cat-back exhaust
• High-flow charge pipe upgrade kit
• High-performance alloy intercooler
• High-flow silicone induction hose
• mTune handset loaded with MR230 calibration
• Optimised cam timing (on 3-door models via included mountune timing tool)
Three options to upgrade online are available; a complete MR230 upgrade from standard, an option for customer who already have an MP215 upgrade fitted and also an mTune (handset) only option. All three versions come supplied with a cam locking / timing tool that's required to optimise the cam timing.
Modified cam timing, huh? All 3-door models of Fiesta ST sold globally use a Bosch ECU and as such has different constraints and strategy to the 5-door model sold in North America. During the development of MR230, it became apparently clear that further optimisation could be achieved on the 3-door iteration by adjusting the cam timing (it's still electronically controlled, but to give a wider operating range). This yielded significant performance increases, but more importantly also changed the characteristics, providing a more liner uplift from lower rpm right to the rev-limiter.
All versions of the MR230 available to purchase online are supplied with the locking tool and instructions on how to make the timing change. However, this is not a job that should be undertaken by a DIY enthusiast as severe damage or failure could result in an incorrectly adjusted engine.
How do I upgrade? Upgrading to MR230 is easy. If your car is standard you need to purchase the full MR230 upgrade, if you have an MP215 upgrade already there's an upgrade option and for all other combinations you should purchase the remaining hardware and the handset only option. All three options are available to purchase online - just head to either mountunestore.com or mountuneusa.com.