whats good?

whats not?

been looking at an aermotive one from lat 4 online, 195 quid with the gauge etc

also, when I set it up what kind of pressure should I be running?

 

All the major makes e.g. Aeromotive, Sard, SX, Fuelabs, etc. I believe these are the major brands worth having. Expect to pay about £180-250 brand new. Some are 3-port, some are 2-port (I think 3-ports are more suited, if you decide on the desired 'parallel fuel rail' set-up).

Std pressure is 3bar (44psi) with vac line off. But seeing as you want an adjustable one, you'll want extra pressure for more fuelling, yes? If so, then they can be adjusted to 3.5bar (51psi) with vac off - theoretically, this gives about a 16% increase in fuel flow, for any given size of injector.

When the vac pipe is put on, expect the pressure to drop back down by about 0.3bar (4-5psi) odd.

 

get SX/aeromotive/fuelabs
avoid FSE/sytec
definitely avoid 1.7:1 rising rate, although they can be mapped for.

Fuel pressure regulator allows you to increase static pressure.