Jesus the effing christ's sake, i thought my N16 building was over the top but you've taken the like, top of the line tuning for most of any cars ever known to man and wiped the floor with that and raised the bar.
This stuff is just, it's not great, that's too weak word, it's far beyond amazing or incredible, you've literally put so much money, effort and parts into that car that you're probably running the fastest N15 in the world after you got the car completed again...
Seriously, that level of dedication to one car... most of us would most likely give up instead of taking everything out of the car just to make it all over...
Only the fenders are not CF yet i guess? could save couple kilos there maybe but you're already past the ridiculously great level of modding here.
I really wonder how you're going to mod it next... that thing just simply is, well, compared to most of other users here, simply said the difference between Pro modding and common modding.
Though we all have different views / tuning points onto things and you're trying to make the car as light and powerful as possible with N/A engine while for example i have taken the weight of the car up and done nothing to the engine yet, i'm working the basics first and compensating the weight later, maybe trying to turbo or something even though i'd love to see a SR engine under my bonnet too.
Have you ever thought of throwing in a SR20VET with or without the turbo? the point of the SR20VET is that you'd get AWD, that's probably one of the really few things you're missing right now, that N15 with AWD would not only be the fastest N15 in world but also the only one with AWD in it, AWD could fix quite many problems but it adds weight though so that might not be nice for what you're trying to do here, also it'd change the characteristics of the car...
Though, throwing in another engine would be ridiculous after spending so much on that one and the nicest thing about it is the fact it's N/A engine instead of a turbo and it's doing, what, near 300 horses now? it is a 2.0 liter VE engine, granted but that's the same level of power that one Malaysian Almera (N16 though) has made with two turbos on 1.8 liter QG engine... that's just ridiculously high amount of power considering the fact it's a N/A engine... the Silvias with the SR20DE for example can only dream about 300 horses, i think the most powerful N/A Silvia from factory with SR20DE is like 200 and turbo around 280, so either way it's impressive.
Meanwhile i have 116 horses and my engine is very oxygenated so it's not pretty either and the N16 as a whole is less sporty than the N15 and the only reason i don't have N15 is the fact the only proper one cost more than my N16 and it had 2.5 times more mileage on it... granted if the N15 was like yours i'd bought that but i'm pretty sure nobody has took a N15 this far in tuning...
Though, doing this much tuning alone (here that is) would cost close to a cost of a brand new C13 Pulsar Nismo (if it ever comes that is, it's been what, 3 years? now since the announcement and even the 1.6 turbo was late)
Granted, the Nismo wouldn't be anywhere near as fun to drive or own, more practicality maybe but you can't really tune anything about a C13 and since it's a Nismo it's already maxed out on power (theoretically), i guess you could throw in a chip to get maybe 20 horses more which'd take it to around 300s (stock is rumored to be like 280)
Either way my wall of text must come to an end (otherwise it could be called a novel and printed & sold on the shelves of a bookstore), keep up with the great, inspiring work and keep on with the mods, reading this thread really made me want to great a SR20 and double my horses but then i remembered i don't have money to even pay for proper paint coats for my "new" set of wheels or for the tires for them, fun's not free i guess.
PS. Two "short" questions : have you ever thought of throwing in AWD system and have you thought of changing the wheels to racing wheels (for racing purpose whenever you do that), i believe Sparco for example has really lightweight set of 15/16 inch wheels and you'd save many kilos with the entire set, though you have the big brakes so they might not fit in first place which is probably why you don't have those?
