my fuel economy hasnt changed on my turbo and i had the fuel pressure mod last week with a boost hike to 21 psi!.

its cheaper to have the fueling there when you need it, than not all and having to replace engines due to damage caused by running lean, and who nowadays buy a rs turbo for fuel economy? when u have a rs turbo running over 200 bhp what chance do u have or expect to have of fuel economy?,

if u spend thousands on engine rebuilds ie pistons and big intercoolers etc u should afford to run rs turbo, if not buy a diesel!! and run it on red!!.