alright, i got a gs-r engine with edlebrock intake manifold, a full stainless exhaust header back, should i add a fuel rail and pressure regulator, also i'm still running a stock vx fuel pump, should i upgrade my pump first and if so to what lph 190 or 255 also i have a vafc is there any rough settings for that or will i have to get it dynoed to get decent settings?

 

leave the stock settings until you get to a dyno. Don't waste money on a fuel rail. a fuel pressure regulator is nice but not always needed. If you end up getting a new fuel pump get the 255 and get a regulator with it to keep the pressure from overpowering your stock regulator.

 

What do you need all the extra fuel for? A few bolt ons don't warrant the dyno time.

 

your stock fuel pump is plenty of fuel for a stock gsr motor