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scooder · 04-14-2014, 01:22 AM

Surely if you remove the needle valve and use a check valve set at 2 1/2lb or whatever pressure, the float bowl will just overflow and you'd have fuel going allover the place. With out the needle being closed by the float, what is going to stop the fuel at the correct level?
GM, could you please explain this? I've tried to understand your thinking here, but I can't get the check valve bit.
I'm a real believer in the return line from the pump to cool the pump, it's been used on production carburetor engines since late 60's or early 70's wether it be a calibrated hole in a 'T' fitting twix pump and carb or an extra small barn on the pump or return from pressure regulator.
Martin.

04-14-2014, 01:22 AM	#28
scooder Senior Member Join Date: Jul 2010 Posts: 2,593	Re: Vapor lock 1 and 2 Surely if you remove the needle valve and use a check valve set at 2 1/2lb or whatever pressure, the float bowl will just overflow and you'd have fuel going allover the place. With out the needle being closed by the float, what is going to stop the fuel at the correct level? GM, could you please explain this? I've tried to understand your thinking here, but I can't get the check valve bit. I'm a real believer in the return line from the pump to cool the pump, it's been used on production carburetor engines since late 60's or early 70's wether it be a calibrated hole in a 'T' fitting twix pump and carb or an extra small barn on the pump or return from pressure regulator. Martin.