Standard fuel pump output guess?
 

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.

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

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

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

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

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

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

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

I agree with Martin here, you need to measure it at a given pressure, and for a direct comparison the same pressure. Even then its only a measure of a constant scenario.

Its like speakers, knowing the Wattage (RMS) tells you nothing about how loud it is, you need the sensitivity, and resonante frequency for a start. Then theres the boxes damping effect (pressure) that changes it all over again.

Lifes rarely simple, but then sometime its better to measure something simple well than something complex badly.

Why not fit a fuel pressure monitor to the fuel line, preferably one that records min and max values. Even then its probably Walbro time, but at least with the gauge you might be able to see a difference (less flat spots) and not feel so bad amount the money/grazed knuckles and general petrol smell ;)