Posted by ldj on August 11, 2009 at 06:55:51 from (68.95.49.12):
In Reply to: Re: Vapor lock posted by sotxbill on August 11, 2009 at 05:42:25:
sotxbill, I disagree fuel pumps were installed to prevent vapor lock. They were installed because fuel tanks were placed below the carb. The 32 Ford for example put fuel down low and had to have a fuel pump to get fuel to carb. That is when vapor lock problems started with Ford. Sooo fuel pumps were the cause of vapor lock, not the cure for vapor lock. You are correct proper routing of fuel line can help. What has eliminated vapor lock is the fuel pump being put in the tank or way back where there will be no vapor. The fuel pump will then pump and any vapor that may happen near the engine is pushed on by the pump just as gravity (head pressure)pushes when the fuel is higher than carb. Did you ever see a car, tractor,etc. with gravity fuel system and a fuel pump?
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