Resolved 420a 4G63 Fuel Injector Interchangeability

[GSTurbo1]

Ok so I'm doing an engine rebuild and want to make sure my 450cc injectors will feed the power i'm wanting to make. I'm trying to run close to 15-20psi, I def have all other supporting mods, but feel that my 450's are a week point. What injectors would be a good size to up to? I have been doing some reading and 420a and 4G63 are interchangeable, correct?

Thanks,

Jason

 

[SoCalK61000]

What kind of power are you trying to make? And no 4G63 injectors will not work in a 420A. Unless you wire in the resistor box or have a MS unit that will run low impedance injectors

 

[WES_393]

450cc will only handle 32 lb/min at 100% IDC (assuming 43psi base pressure). Your 16g is capable of well over 30 lb/min at 20psi. Some guys have seen almost 40 lb/min at a hair above 20psi. When it comes to injectors, I suggest you go as big as your tuning device will allow. However, the mimnum size needed for your turbo on gas 650cc.

 

[GSTurbo1]

ok... cool looks like upgrade time