ive just done the RB25DET swop and couldnt be more happy with it, low boost, 0.65, making around 200kw, awesome to drive and sounds amazing,the RB's torque feels so nice 😀
my car is a daily and will be used for the occasional track day, my reasoning for the RB as a dailly is:
at low boost and almost stock you can make an easy 220kw
its a strong engine with almost limitless potential
i want my car to be fast and reliable, so at this power the RB is at ease, makes the power easily and goes like stink
the l6 sound 😀
and basically if you ever want more power it can make it quite easily, the initial cost of getting the engine in etc is costly but then after that you can make big power quite reliably and with ease up to 400-450 on standard internals 😮
but that being said, an ORIGINAL SR here in S.A!!!!
thats special, i'd keep that, i agree with mario, if you gona change the engine then sell that sx and get another, my opinion,thats a 1in5 in S.A and thats more rare then any RB powered nissan here
a 220kw sx is a mean machine, RB or SR depends on your goals though so thats the big decision, would also help to drive a modded sr and an rb to gauge against each other if you havent done that yet
all my opinion