I've been hearing that the 2540 can only produce as much power as the 2530, but with more lag... unless boosting really high. Most of these conclusions have been made from using twin setups on GTRs.
I would like to know how a 2540R would go on an SR20DET, since the 2540 wont fit without modification. The 2540R is also suppost to make a bit more power than the 2540... and the only difference i can see is that it has a 0.50 a/r compressor housing compared with the 0.60 a/r of the 2540.
What advantages/disadvantages would i see with the 2540R, compared with the 2530... i'd actually prefer the GT-RS, although they are very hard to find second hand.
Also... what about the 2835 with internal wastegate... would it be worth going to next step, or would it be advisable to go for the external gate model?