Anyone running boost with a returnless fuel system. I don't understand how you can tune any of these GM vehicles if it is fixed fuel pressure and the IFR table doesn't go into the boosted range?
Does everyone that runs boost install a return line and a fuel pressure regulator referenced to manifold like the old days?
I'm knee deep in fitting a supercharger to an 06 gm I6 4.2. I've been trying to learn all I can so I can tune this thing when I complete the hardware. I hadn't originally planned on changing the fuel system but from what I've come to understand, I don't see how the PCM can get an accurate fuel calculation with a fixed rail pressure and the way the IFR table is laid out.
Anyone help out?