On Thu, 18 Sep 1997 21:13:04 -0400 (EDT) jaars(at)cyberportal.net writes:
>The car has an electric fuel pump and Weber Carb. A previous Alpine I
>owned had
>an electric fuel pump, but an adjustable flow valve was installed
>between the
>pump and double Zenith carbs. If I remember right, the valve was set
>at approx.
>2 or 3 out of 6 positions.
>Could too much fuel be my problem and this car needs such a valve????
Sounds like what you had was an adjustable pressure regulator.
Most smaller carburettors require between 1 and 2 PSI pressure.
The float, needle and seat for the carburettors are matched to
the pressure output of the fuel pump, because the fuel level is
partially dependant upon the fuel pressure.
Many electric fuel pumps have the capability to make quite a bit
more pressure than the needle and seat are capable of closing
off, so in these cases, an adjustable regulator is essential.
If the pump can produce more than 2psi, then I would recommend
a regulator.
I didnt quite understand the anomily that you experienced at 2000 to
2500 RPM, but if you look down into the carbs, with the motor NOT
runing, but with the pump powered, and you see fuel dripping onto
the butterflys, you need to overhual your carbs AND/OR use the
pressure regulator.
Jarrid Gross
This archive was generated by hypermail 2b30 : Tue Sep 05 2000 - 09:56:55 CDT