For my fuel system im going to use the subaru internals (swirl pot and pump) grafted into my tank because I dont want an external pump or to pay out for a swirl pot.

It all looks good but Preliminary examination of the scoob tank shows there are 2 pressure relief valves.......well thats what I believe they are rather than breathers?

Does the subaru run a pressurised tank?
if so why?
what happens if i dont use this pressurised system - bearing in mind im using subaru internals.?

Can you have a look at these pressure valves and see how much pressure the release at. I would imagine the kombi tank could handle a small pressure.

This slight pressure may even be used to assist / prime the pump ???? maybe.

Personally I would prefer to modify the system to incorporate this pressure, this way you can be asured of a fully sealed system. Remember to use the Suby petrol cap aswell.

just thouht i should give everyone a bit of a warning from my personal experance (ej20t manx)
i put a swirl pot with internall pump under my main tank
this was gravity feed
i put a breather/equlizer from swirl pot to top of main tank
i put the fuel return line from the injectors into the bottom of the main tank
then went for a drive
the tank very quickly (in a couple of k`s) blow up like a balloon
so i relized i needed to put a breather in my filler neck as well
this fixed the problem
i think i was very lucky it didn`t split at the seems
back to having fun now hotdog

hmm interesting this - ive put this on some scoob forums too but not a single answer!! so thanks to all you for your replies....i think i will probably use them if I cant find out more info - however I would prefer not to as its more work to fit them than not. ill check the pressure rating.