The numbers are a little bit low but not unheard of. I dyno tested my 2019 Nismo and it made 296~ whp bone stock STD on a dynojet. I ended up throwing my custom 3.5" exhaust on it with cats still and it made 312 whp. The factory tune on the newer cars is suprisingly good.
I also ended up tuning another 19 Nismo for a customer and he had similar results to you. I wasn't able to extract more than 310 whp out of it but he still had cats. I'd expect atleast 320 whp with your setup but at the end of the day it's just a 2-3% difference at most.
__________________
Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP)
Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58)
BTWTuning
|