I've been watching this thread with interest,as I have HKS 2530's on my R33,I also have a dyno printout from RacePace in shootout mode,just like wetgtr,7 months apart.
My run was with standard cams,standard bottom end,stock afm's,stock pump and 740cc inj,HKS cam gears,98 octane fuel.It made 371rwkw.It has since had a forged bottom end rebuild.The following results were before the rebuild.
At 3500rpm,both make around 115rwkw,at 4000rpm the T04Z is 10rwkw ahead and it gradually puts some distance on the 2530's,30kw@6500rpm and 67kw@7500.
I have some HKS cams,Nismo afm's and a Tomei pump to go in shortly,although my next dyno run will be on Ice's dyno,I'll post up results.