Standard fuel pump output guess?

PukkaSilvia · #1 10-01-2007, 00:36

Who with a standard low miler s12 wants to test the standard lph output of the fuel pump.

I was thinking that someone could undo the hose before it reaches the regulator and then extend it into a jerry can and see how many litres it pumps out in 10 minutes, then multiply it by 6 or 5 minutes by 12. Its only out of interest........ I have heard there around 120lph at a guestimate, the s13 pump i have also heard that is 95lph. Which is surprising.

30psi · #2 10-01-2007, 01:12

Hate to make things more complicated but the flow rates stated by pumps are also at a pressure (3 bar maybe) so you would have to test what it can flow whilst maintaining this pressure.

Also needs to be tested what it can flow in a boost situation ie higher pressure, which is probably where its main weakness will show up.

Just fit a walbro. Simple

PukkaSilvia · #3 10-01-2007, 01:23

can we not measure the pressure the pump is putting out with a hand held fuel pressure gauge

What pressure is the walbro pushing 255lph out at?

I have got a walbro fuel pump,Im just wondering out of interest

PukkaSilvia · #4 10-01-2007, 01:25

I think it may even tell us in the manual what pressure the fuel is from the pump.

30psi · #5 10-01-2007, 01:25

Dunno do a google, but I think the Walbro can push that flow at 2 or 3 bar

30psi · #6 10-01-2007, 01:27

The service manual will tell you what effect the regulator will have on fuel pressure, but nothing about flow or absolute max pressure

sideways danny · #7 10-01-2007, 01:28

simpler than you think Martin, the walbro pump literally pumps out 255liters every hour, pressure doesn't change that

30psi · #8 10-01-2007, 01:42

Don't see the point of testing it like that.

There's some info here

http://www.stealth316.com/2-fuelpumpguide.htm

Yeah, they tested a Walbro at 3 bar and got 262lph

Testing a standard pump will be a pain