[meggala]

hi guys nice board
I'm in a similar position I have just got my self a ca 180 sx jdm I live in australia. and I'm going through the same dillemas I know heaps bout the rb's but not much bout the ca's but quite a few people have said stick with the ca's so I will do that for now.
I personally think for the money you are goin to spend the rb20 is the way to go if you can limit how much power you want to around 450-500 hp.
to get there you will need to upgrade injectors and afm.
stock injecotrs are good for 300 340 hp depending who you talk to btw I"m talking fly wheel hp.
If your using the car mainly for draging not circut racing the rb 20 will be great and you will have fun it doe change the weight balance a bit and the wiring can be scary I have wiring diagrams on my site to help a bit. if a good cost effecive transplant.
with the sr rb25 choice I would go the sr every time unless I want a monstor drag car we have an rb25 powered silvia here first run out with td06 20 g turbo heaps of boost  street et's still manual it ran 11.4 with a 1.5 60' time thats imprssive but if you want to corner the sr is king.
remember watch you tune detonation is the enemy of the rb it can handel heaps of boost just watch you fuel and timing
just some thoughts any way
meggala