I had the same problem with my SU's and it went away as soon as I changed
over to Grose jets.
At 08:41 AM 13/03/98, r-james@tamu.edu wrote:
>
>Joe, Atwell, Hector, and Joseph (and others interested...)
>
>Thanks for the thoughts about causes of and solutions for
>the leaking Spitfire carb.
>
>The consensus seems to be that the most probable cause is the
>float valve sticking (even though I replaced mine with
>two different new ones, the lines must be full of gunk,
>so they keeps sticking).
>
>My Spitfire has an original style mechanical fuel pump. I
>have not measured the pressure, but I expect it is much
>higher than the 2.5 psi that Joe sets his regulator to.
>
>Joe Curry's reason 5 seems appropriate to most problems I find
>with these cars, "It just wants to [leak]."
>
>Someone noted that the Spitfire fuel will not leak out, even
>if the float valve stays open. A factor in my huge leak was
>a pressurized tank. The tank was full, and the car was gathering some
>nice spring afternoon sunbeams, and when I found the big puddle,
>I popped open the fuel filler cap and the tank was clearly pressurized.
>I think I may have had my complicated fuel vapor recovery system
>plumbed incorrectly, as there were no open ports on any of
>the charcoal cannisters. I am trying to figure out how
>these should be plumbed, but I think at least one opening
>needs to be vented to atmospheric pressure.
>
>This weekend I am replacing the ZS carb with a Weber DGAV
>(which will make this car's setup identical to my 1979 MG
>Midget 1500 cc). I don't have a fuel pressure regulator on
>that system, and haven't had any reason to add one, but
>most Weber literature indicates I should regulate the fuel
>pressure. At least I will change out the fuel filter and
>blow out the lines.
>
>
>
>
>Thanks,
>Ray
>
>-------------------------------------
>Ray W. James, P.E., Ph.D.
>Texas Transportation Institute
>Civil Engineering Department
>Texas A&M University
>College Station, TX 77843
>Phone (409)845-7436; Fax (409)845-3410
>E-mail: r-james@tamu.edu
>Date: 3/13/98 Time: 8:41:59 AM
>-------------------------------------
>
>
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