i currently have 228rwkw also chasing 250rwkw
i have
power fc
hiflow plain bearing turbo
walbro fuel pump
ces split front/dump pipe
FMIC
AVCR ( Set on 12 psi )
Hiflow cat
3"exhaust
I am soon to have installed a Z32 AFM , nismo fuel reg, and 555cc injectors, and goin to bump it up to 18psi
We are led to believe, might be able to crack 260rwkw safely
And as for lag, mine has hardly any at all, even though its plain bearing and does produce more heat, and more time to spool, Too small of a turbo to notice .
Im in the same situation as for not wanting to open up the engine, as this will be my last of mods, b4 i would have to look at doing this, if i want my engine to last.