stock standard, an ej255 will never make the same power reliably as a ej205 or a ej207. You will though, have a much more drivable car. Especially with a vf34 you will struggle just to keep it OFF boost.

expect about 230 kw atw reliably. and 250 kw if you can get a 257.

Boost wise. I'd say 17 PSi for the 255 19 for a 257.

Chuck 20 grand into it though and 300 is the limit before you start breaking things on a weekly basis.

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