look your missing the point. the sr is a 2 litre turbo motor with 8.5:1 compression. the ka is a 2.4 litre with 9.5:1 compression. tuning wise the ka is actually closer to the rb25 than it is to the sr. the reason you want to use 370cc sr injectors is they are cheap, really cheap. sr guys just throw them out or you can buy a set for less than $100 shipped. your only wanting to make 250whp which the 370s can do and still leave you plenty of head room. the best part about using the 370s is you wont have to retune the ecu, it will run a tad rich till you throw that piggy back on there, but wouldnt it be funny if the increase in fuel from the 370s was just enough to compensate for the additional air of the t25. now id like to see that.

just remember any time you see "sr" preceded by "s14" or "s15". you going to pay out the ass for what ever it is.