How important is 1psi of fuel pressure?

[RustyRatRod]

So exactly how does fuel pressure control float level? Especially on a running engine?

Higher pressure puts more fuel in a given place faster than lower pressure.

 

[Syleng1]

Higher pressure puts more fuel in a given place faster than lower pressure.

Gotcha.

 

[Mattax]

Except when it doesn't.

It depends on the type of mechanical pump, and also depends on the type of regulator if one is used.

Oh wait. I already posted that. Oh well. redundent post.

 

[Mopar Tim]

Except when it doesn't.

It depends on the type of mechanical pump, and also depends on the type of regulator if one is used.

Oh wait. I already posted that. Oh well. redundent post.

Easy way to show this is, take a garden hose, no nozzle, just free flowing. Then take same hose, put a nozzle on it. Which flows more fluid and which has higher back pressure...

 

[Syleng1]

Easy way to show this is, take a garden hose, no nozzle, just free flowing. Then take same hose, put a nozzle on it. Which flows more fluid and which has higher back pressure...

That’s not 1psi. That’s upwards of 60-80psi.

SN: I ended up leaving it and it works fine.