racing and safety Fuel shut off valve

[Russell74Fjord]

Did a quick search and did not find anything (no dead kittens, I hope)

 

My old weber 32/36 had a shut off solenoid built into it, that shut off the fuel when the car was turned off.

 

The now installed 40DFAS does not, and I suspect that the ambient fuel pressure when the car is turned off is pushing fuel through the carb, puddling fuel in the intake manifold.

 

If the car only sits for a few minutes, it fires right up, after being driven, but any longer and I usually end up hold the accelerator pedal to the floor to start it. And I have see the puddles down in the intake manifold. 

 

So,,

 

What recommendations does anyone have on a fuel shut off valve. Likely installed between the fuel pump (stock, mechanical one, Pierburg) and the carb ?

 

I might see if I can retro fit the 32/36 solenoid onto the 40 DFAS but if not, will go for a shut off valve.  

[Preyupy]

The solenoid from the 32/36 is just a idle jet shut off.  If you are having problems after shut off it is because of the fuel line pressure into the float bowl.  The solenoid will not help you.  Check your fuel pressure (you don't need more than 2 psi)  and your float level.  You might be having a problem with heat boiling the fuel (ethanol boils at a much lower temp than gasoline)  once you have turning the engine off.  Are you running a heated intake manifold? 

[Arizona02]

Think the needle and seat valve is the leaking as long as the float level is proper.

[Russell74Fjord]

get , needle valve and seat are new-ish and are OK, and float level, and yes I do run a heated manifold here in Seattle, I do have a pressure regulator that I can install, I'll try that and tone down the fuel psi. I think when I was running with it fuel pressure started off at about 5 psi, without being regulated.

[vacca rabite]

That's over pressure.  Put the regulator on and dial it back to ~3 psi.

 

Zach

[Maruni02]

Hi,

What's the usual float level setting on 32/36?

thanks

Wally