ST/RS Basic Modification Path and Power Estimates
One of our most frequently asked questions is "what kind of power numbers can I see for certain modifications on your custom tune", so we thought it would be a good idea to throw together a basic guide on the average numbers that we usually see. These numbers are just a basic guideline and do not serve as a guarantee for the numbers that you will see on your specific vehicle as maintenance and modification choices can and will affect the overall performance of each car.
All custom tuning is done via COBB Accessport.
Stage 1 - Stock, Custom Tune
Focus ST - 93 Octane Fuel: 260whp/350wtq, e30 Mix: 270whp/370wtq
Fiesta ST - 93 Octane Fuel: 200whp/260wtq, e30 Mix: 210whp/275wtq
Focus RS - 93 Octane Fuel: 345whp/380wtq, e30 Mix: 355whp/390wtq
Stage 2 - Intercooler, Custom Tune
Focus ST - 93 Octane Fuel: 270whp/360wtq, e30 Mix: 280whp/380wtq
Fiesta ST - 93 Octane Fuel: 205whp/270wtq, e30 Mix: 215whp/285wtq
Focus RS - 93 Octane Fuel: 355whp/390wtq, e30 Mix: 370whp/410wtq
Stage 3 - Intercooler, Downpipe, Custom Tune
Focus ST - 93 Octane Fuel: 275whp/365wtq, e30 Mix: 285whp/385wtq
Fiesta ST - 93 Octane Fuel: 210whp/275wtq, e30 Mix: 220whp/290wtq
Focus RS - 93 Octane Fuel: 360whp/400wtq, e30 Mix: 380whp/420wtq
*One step colder spark plugs are always recommended when tuning, an upgraded intake or filter can also be beneficial.
**Catback exhausts do not usually add power.
*** Estimated numbers are based on STD corrections on our dyno (or a similar DynoJet dyno), estimated numbers can usually vary +/- 10whp/wtq
Interested in upgrading to a bigger turbo? Check out our Focus ST Upgraded Turbo Recommendation and Dyno Results article!