Yeh saw you out at Calder couple Fridays ago. My mate was racing his white 35 Gtr. Was wondering why your mph was down from last time. 8psi explains that!
This is a lot better
http://www.carmagazine.co.uk/News/Search-Results/First-Official-Pictures/Infiniti-Q50-Eau-Rouge-to-use-Nissan-GT-R-style-V6-engine-2014-first-details/
Before you go thru the loom. I'd change the battery terminals and make sure u get a new negative battery Cable with new terminal.
Clean all earth contacts and see you u go.
Alternator Is fukd. Once u get the car started
Test the alternator by putting load on it and see how much battery's voltage drops with the lights on. A/C
Rear demister ect.