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.

 

[Bewy]

Tim,
Post #29. Do you mean that adding the nozzle increases flow? If so, that is incorrect.

 

[RustyRatRod]

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.

I was takin for granted no regulator. Anyway, that said. 1PSI is pretty important if your gauge reads 0. LOL

 

[Mattax]

Tim,
Post #29. Do you mean that adding the nozzle increases flow?

Geoff, Do you want to reread Tim's post and delete yours?
Two scenarios and the question was which one has higher pressure and which one has higher flow?
How in the world could you think that Tim meant that one with higher pressure is the free flowing hose?