Spankie

so i just got done swapping a carbed 355 into my 94 z28. Fired it up for the first time and my fuel gauge is showing 14 pounds '' not good'' . Ive got an areomotive a1000 bypass reulator , i try to adjust lower but nothing . im running a walbro 255 intank pump threw the stock lines up to around the drivers door than to a -8 line to the regulator, than I have a -6 return. is there anything im doing wrong ,or to much pressure to regulate down ? im at a loss , any help would be great

jimmyblue

iTrader: (11)

I've used several of those little "Mr Gasket" fuel
pressure regulators on my carbed vehicles, as
a crutch you may put that after the A1000 and
before the carb.

Given that the thing is carbed, it seems like you
are wasting good hardware and electrical power
to run an unnecessarily high pressure pump and
then scrub the pressure back off. Why not pull
the assembly, make a plain pickup tube and an
external low pressure electric pump?

C5Fire

Your return line is too small! The regulator is no longer regulating, the return line is. Place a true 8AN line from front to back and make sure the connection at the tank is also a 8AN. Problem will go away.

Gauge

iTrader: (3)

I agree with jimmyblue. There's no need to make all that pressure and then turn around and try to bleed it off.

C5Fire

A fuel pump doesn't make pressure it makes volume. The regulator gives the pump something to back up against to which in turn creates pressure. Once the desired pressure is meet, the rest is bypassed back to the tank. So if you have your pressure set at 7psi at the regulator you will have 7psi at the pump, no more.

His setup will work with the parts he has (if he replaces the return line), no need to re-design the wheel.

Spankie

thanks guys just got done, talked with areomotive today they said a -6 was fine just had to run all the way back to the tank . went and got some more line sitting at a soild 7 psi now