feul pressure

how many psi can you run on a 420a with stock internals

Why would you want to raise your fuel pressure?

my fuel pump is going out so i got a walbro pump and a jdm fuel pressure regulator and was wondering what the psi stock was and what it could be raised to

What car do you have? Put your car and mods in your sig. also if you got a 190 you dont need an afpr and if you got the 255 you do but I'm guessing your "jdm" fuel pressure regulator is from ebay and honestly its junk. For saftey reasons I would suggest not using it but to answer your question IIRC the stock fuel pressure is ~47psi and should be kept at that level, hence the afpr

its a 95 gs and it has a cool air intake, exaust built head, crank

What pump did you get?

the pump is a 255 and the regulator is from www.andysautosport.com

well in that case I have no idea what the pressure is supposed to be on a n/a do you plan on boosting it?

i plan on it in the next 4-6 months