Fat fuel line?

[W5R]

Am I over-thinking this (like some others) or would the thicker line deflect less with a pulse-type fuel system like we run, resulting in better performance from the fuel pump? I never really thought about this until today.

These engines only require very little pulse signal to pulse the fuel pump, it is not enough to pinch the line on its own if that is what you mean. It makes no difference what size line is used, just personal preference

 

[ONEHARDHEAD]

No, I was referring to the wall thickness being less prone to swelling.

 

[Bob Evans]

Actually, if the fuel pump is pulsed from the intake and the engine has a restrictor plate, there is something to using a larger/longer pulse line. However, I doubt that there is any gain to be had from a larger fuel supply line from the pump to the carb fuel inlet.