why dont you put a helper pump behind your filter, so its being pressure fed?my car did amazing things when i added a lift pump..
I haven't seen the need for this on my jetta yet.But I put a carrier electric pump on my old f250 and love it. It is also a lower pressure fuel delivery. The pump is meant for constant duty diesel fuel, I have read it does not like thicker cocktails. This pump cost me about $80 shipped, then I had to pay for hoses, fittings and sealant and wiring.
enough boost is when you have 3 dimple marks in the hood from the valve cover nuts..