When converting an N/A fuel injected engine to turbo do I use the standard fuel pressure regulator (I'm not sure if the FPR raises or lowers flow under vacuum etc.)? If so do I take a vacuum feed from before or after the throttle body?

Also what would I do with the standard oil breather system? I gets a feed from the plenum into a breather box then comes back into the throttle body just before the butterfly, should I ditch the standard box and run the system: plenum --> oil catch tank --> breather/filter to atmosphere?


If it helps he engine is an omega v6 engine and I'm using aftermarket management with an idle control valve

Thanks

 

Most N/A engines have a fuel pressure regulator complete with vacuum line. Your engine should have one. Normally these regulators only lower the pressure when the vacuum increases (pressure inside the manifold drops).
If the standard regulator can also raise the pressure under boost? You would have to test that. But you do need one that both lowers and raises the nominal fuel pressure based on the pressure in the inlet manifold. That's after the throttle and you should have that connection already.