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Lol that depends on how long you want the engine to last and what you use the car for....ie motorsports, just cruises etc. I wouldn't push mine much passed 300kw at the wheels as it sees a fair bit of track use. That said a mate ran a tired 32 motor for two years of solid track use at around 320kw (atw) before it let go.

just roughly i know a rb25 will take around 280kws ok without strengthening the engine... but what can a rb26 take?

It's RPM that is the most hurtfull, so if you stick a big turbo on it and hence have to rev it, then it won't take much over 325 rwkw

If you use sensible sized turbos, and hence don't have to rev it, then just under 400 rwkw has been done more than once.

Cheers

Gary

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