Change Fuel Pressure Regulator 3.0 bar -> 3.5 bar

[fabianyee]

Has any M42 guys here tried replacing the stock 3.0 bar Fuel Pressure Regulator with a 3.5 bar FPR from the M50???

I supposed it'll be running a little richer with good low end torque.

If any of your guys have tried, please share ur comments..

[DaN]

I haven't done this, but I doubt you'll gain much power if any.
You also risk damaging the catalyst.
Plus, the dme should compensate when it senses the rich mixture, and dial back the injector pulse width.
I wouldn't waste my time.