99 gst 420a dsm
20+ Year Contributor
- 509
- 2
- Jan 22, 2003
-
Turboville,
New York
i know that turbo dsm's have 1:1 fuel pressure regulators... and i think that non turbo 4g63 motors have a 4:1 fuel pressure regulator, so if you put a 4:1 non turbo fuel pressure regulator on a turbo 4g63 with a vortech fuel managment unit and a 4:1 disc would that increase the output of the 450cc injectors, i dont mean it changing the flow, but i know that in my 420a with a 4:1 fpr i can run 415cc injectors and get 300+ horse no problem, but to get that out of a 4g63 u have to get 550s, and i thought i herd once of a guy using a non turbo fuel pressure regulator on his turbo 4g63, so if you have ne info help me out
