That's a pretty good result, Mitch.
Considering stock standard RB26's will pull between 170kw and 180kw at the rears with the 4WD fuse taken out (R32's) on stock boost (meaning the restrictor still in).
Mine pulled 174.6kw at the rears on stock boost (the GTR still has the stock boost restriction in it! Never been touched), stock turbos, 3 leaking injectors (found that when it was on the dyno), a collapsed centre muffler baffle and a stuffed cat. No ecu mods, no EBC, stock intercooler... only mods are twin Blitz pods. Pretty good result! And the engine is in good condition (170psi across all 6 on a compression test, leak down test proved it's healthy, too).
Once I've replaced the exhaust with a full new system, I'll put it back on the dyno and see what I get. The injectors have already been fixed. My exhaust is that badly clogged, that I can expect to see a large difference (like, 20kw or 30kw extra lol).
Mitch, What do you mean you've modified the coilpacks? If you've ripped out the stock coils and put in Splitfires thinking it'll improve performance... you've wasted your money. Nissan Standard Coilpacks are the best you can buy... Splitfires are a cheaper alternative.