[GeneralRS]

Hi everyone!
Im just wanting to build my RS with 420 whp! Just wondering what I should do to it to get it to 420! Any help would be great! This is my car I always wanted! Just want to do it right!

 

[CescoBaby]

Gives us an update.

 

[White-RS2]

500bhp roughly 420whp

You’ll need to go forged, a bigger turbo Cobb handset or Syvecs ECU, cams wouldn’t hurt, air filter and inlet pipes. Exhaust some other stuff and about $18000

 

[magnus]

Is there something specific about the 420 number?

The stock motor hardware is pretty tapped out straight from Ford. Reliable power in the range you're talking about requires great expense in the form of a built motor. You might find that you don't enjoy the trade-offs required in terms of noise/harshness of the driving experience, or peaky power, or fuel economy, or you might find that all that power doesn't make this platform more enjoyable.

This is the party-pooper opinion but if you want that much power reliably, start with a different car that comes from the factory with the power you're after. It will be engineered to work well as a system and likely cost you less in the end. Full disclosure - my car is stock, I haven't built any EcoBoost motors, and I am painting with broad strokes based on casual reading of the forum.