old schoold fuel tuning question

[Jason81NA,82RBtt]

I know that this is the very old school way of tuning a engine. But a friend of mine has a turbo motor that runs prefect but uses a lot of fuel, because it's running rich on bottom-end and perfect(tested wide band) at 2/3 or more throttle. He wants to keep it simple. I suggest he get a adjustable fuel pressure regulator and lower the base fuel pressure as low as it will go. say about 25psi or so, then use a rasing rate regulator to boost the fuel pressure the where it is now at WOT. I have had good lucking tuning with fuel pressure in the past on turbo and non-turbo projects and feel that this would work. Does anybody see any reason it wouldn't.