Fuel pressure questions from 91 jdm vr4

[91awdmonsta]

I have a 91 talon tsi awd and i'm doing a jdm 4g63 swap from a 91 jdm galant vr4. It has the 510cc injectors and i will ONLY have the fuel pressure regulator from the vr4. I ordered a walbro 255 pump. My question is can i slap the pump in and be ok with the vr4 fpr and 510cc's or do i need a different regulator?

 

[Tevenor]

The injectors don't determine if you need a FPR, the pump does. If you use a 255 then yes you do need an AFPR.

 

[psychlow]

Stock pump ---> Walbro 255 = probably needing an AFPR
Stock injectors ---> 510cc injectors = needing an SAFC or similar to tune.