MK2 Ford Focus ST225 Tuning Guide

The 2.5L 5 cylinder Volvo engine found in the MK2 Focus ST is a very capable platform with huge BHP and torque gains available.

Block mod is a big subject when it comes to tuning these vehicles, some swear by it and some run for years without it with no problems.

 

WP Stage 1

Stage 1 requires no hardware modifications and with just a remap will see 260-275bhp and 360-380ftIb completely transforming these cars.

Advised mods:

- Induction kit
- Decat

Clutch upgrade is advised at this stage, if remaining on stock ST clutch then we would use a low torque tune to protect the clutch.

 

WP Stage 2

 Stage 2 will see another large jump in power with some further modifications

- Upgraded intercooler
- Induction kit
- 3" Exhaust
- Clutch upgrade

On this spec we would typically see 300-320bhp & torque capped to no more than 420ftIb - We will also be at the limit of the stock fuel injectors at this point

 

 

 

WP Stage 3 

Injectors need upgrading at this point to either RS 440cc or 550cc to cope with the extra power.

We also upgrade the standard actuator to a Turbosmart IWG75 unit, these have a stiffer spring than the OEM one which allows us to carry extra boost through the top end of the rev-range.

At this spec we should see 320-340bhp and is the limit of the stock K04 turbocharger.

 

 

WP Stage 4 

The next step involves replacing the turbocharger with one of our WP Hybrid turbos. These units still provide excellent response but can deliver up to 380bhp with correct supporting mods.