getting a little off topic but...

I don't know what the manufacturing tolerance is for nissan but. for BMW M engines (with the S designation) the tolerance for HP is -1% to +10%. which mean in a S52 (my engine) you can have as much as 264hp or as little as 237.6hp.

Mine dynoed in at ~220hp. which is approximately 258hp at the crank using the 15% loss. some M coupes dyno at 225hp, the lowest I've seen is 203hp. they are both within the tolerance set by BMW.

Nissan says 287hp. That is believable to me but I'd be more interested in the tolerance allowed for the engine output. because lets face it not all engine is going to make 287hp as advertised. some might make more and others will make less.