Fuel cut defender question

Hi there,
 
  I have a 91 MR2 turbo with ct20b, MBC, 3" downpipe/ exhaust and I wanted to increase the boost a bit so I got a Fuel Cut Defender. And now, I am wondering how safe the FCD is on a stock fuel system from a 91?
I am planning on increasing the boost between 14 and 16psi (whatever is safe on the system I got now). And I am wondering if the fuel system/ pump will be able to handle that? And if it doesn't, what would happen? The FCD should still prevent me from running more boost than the fuel system can handle by cutting the fuel/ boost if I try to boost too high, right? Or should I be looking at upgrading my fuel system even at this level of boost?
 
I ordered a wideband o2 sensor so that I can see what's going on, but even then, I would prefer for the ECU to handle that on its own, rather than having to monitor it myself.
 
I only recently bought my 1st mr2, so I am seeking advice on the experts to make sure I don't do something stupid :)

Thanks man, that's what I wanted to hear :)

if the mr2 ecu is anything like the gen2 (st185) ecu then as Dylmrt said, it will be fine. 15 Psi would be my target.

Cheers,
Tim

If you are concerned, put the car on a dyno whilst increasing the boost to confirm air/fuel ratio is acceptable.
 
Might be a good idea to resolve your other issues first before increasing power output.