i was running 0.8bar which is about 12psi,
i was running potenza G3 (street tyres).
13.8 was very easily done... if i had more runs im sure i could have got a better time, im not 100% of how much hp i was running but i would est at around 200 hp as i was stillrunning stock dump pipe...
also i had my coilover setup on the hardest setting and didnt have time to change them to the sofest setting.
With the mods you have listen i would est a 12second 1/4mile.. again it depends how well you can drive im sure with 300 to 350rwhp you could achived a low 12 or a high 11's
im not sure if option 9 is need, as lot of rb25 are running between 300-350rwhp on stock engines.. thou the cams would help bring the turbo on boost quicker
also do ecu before injectors as you cant run aftermarket injectors without an aftermarket ecu.
Bov isnt needed but if your going to run around the 300hp mark i would say upgrade to stock gtr bov, but for now i say dont change it,as i found the car was quicker which the stock bov compare to an aftermarket atmo bov, as it made the car run alot richer (but if you have an aftermarket ecu this program can be fix very easy)
ohh and if you dont have any sort of aftermarket shock/springs i would look at upgrading them aswell, as no point having power if your car cant handle good (i found my coilovers to be one of the best mods ive done to date increase the cars handle charactised by a huge amount)
hope that helps
p.s if ur wondering where my post went i fit delete when i was tring to edit it hehe
p.s im guessing your from wa if your looking at the xspeed website yeah?