hi, im upgrading my hitachi carb to a weber,and have discovered the abscence of a return to tank line. instead what seems to be the return from the hitachi goes through 2 little 'canisters',one of which seems to have a vacuum conection. i was wondering what these are. the pipe from these just terminates in the engine bay with an open ended pipe. would i connect the return from the weber to this system? i thought i might just blank the return. cheers

I did that wrong once, hooking up a surge tank. If its the same as a USDM brat, the return is on the firewall by the trans tunnel and the lower fuel line in the corner by the strut tower is the vent. You can check by blowing on it to hear bubbling in the tank.

It should have a return line - every Subaru since 1980 has one. There should be three lines comming from the tank to the engine bay - supply, return, and vent. As noted the supply and vent lines are next to each other (supply being the larger) and the return is closer to the transmission tunnel.

 

GD