I have a fiesta rst and just wondering what it should be running on standard boost? And whats the safest this can be raised to, and how do you go about it?

 

standard boost is 7.2 psi.you will need to get a tuner to get your car to run higher boost safely as the fueling needs to be increased to match. you can run a bit more boost with standard parts but idealy youl need chip actuator and setup by a pro or it could be a ticking time bomb!!!!

 

You need a suitable remapped chip to start with before anything, if you try to raise boost now not only will it destroy your engine and experience overboost protection.

Stage 1 165 named so because that is the claimed power it's supposed to give, will be easiest as it just requires a chip and boost adjustment. This will see around 160HP + ATF on a good setup/engine.

Stage 2 is 195 chip again meaning the claimed power, beige denoting the colour injectors (701's) to be used. This will make around 170-180 HP + again dependent on engine condition.


Martin