Higher fuel rate...ffs they only have 100kg to work with.
Who gives a shit how or when they use it?
Endurance racing or the premier motorsport category?
I missed the Z32 AFM and boost controller but it was a very basic list of minimums.
A search as suggested is the least you can do since this has been covered several hundred times over the years.
You can choose higher flowing injectors and use exotic fuels but the parts list was the least. So take your time to search, don't be a bitch about being told to search, read, read, read and add questions to existing threads and you will be rewarded with the best result for the least outlay.
FMIC, bigger injectors (480cc),new fuel pump, bigger turbo (hiflow), engine management (Nistune), 3" turbo back exhaust would be the most basic modifications required.
You can choose, bigger and better items but that is a basic starting point.
Check light will be TC not sure why the tacho isn't working. Like installing a PFC into an S2 Stagea if you feed pin 51 3.7v the check light will go.
Nistune with the right base image will sort it all out.
Speed should work on the handcontroller.
I would inspect the plug on the PFC for an issue with the relevant pinout and at the very least carefully reinstall the PFC and see if a simple R&R fixes it.
From memory Checkbuzz reckoned the GT3076 was as responsive as the GT-RS. If the GT-RS was setup correctly there was no chance unless he was just overlaying dyno printouts and somehow extrapolating things???
On the road the GT-RS is a way more responsive turbo but runs out of legs sooner exactly as you would expect.
Are you running the factory ecu or aftermarket?
If stock ecu adjust idle screw to desired rpm and see how the car likes it.
650rpm is not that happy on both my RB's so I always set it a little higher.
Any R34 GT-t or Series 2 Stagea ecu should be fine. When the Nistune board is installed you specify the correct base image which will correlate with model of car you have ie. and whether it is auto or manual (and it does make a difference to the behaviour of the ecu).
If might be worth your while calling or emailing Matt @ Nistune and asking him to look over you ecu.