ALi-B

iTrader: (1)

I'm working out fuel pump delivery requirements, and the calculations are based on weight.

But fuel pumps are rated at Gallons per hour or Litres per minute.

I found something on google, but can't confirm if its US gallons or UK gallons....help!!!

Anyone know...or have a link to a site that can calculate fuel flow requirements based on aproximate/ expected BHP??

farmer1

Just a small point at what temperature would this be remembering that the weight will stay the same when fuel expands because of temperature.

J4CKO

iTrader: (1)

A uk gallon is 4.54 litres, i.e. it will weigh 4.54 Kilos, or just shy of ten pounds.

ALi-B

iTrader: (1)

OK assume ambient of 15 to 20 degrees C

I think it's about 1.3 litres to the kilo? Anyone confirm that?

ALi-B

iTrader: (1)

I thought the weight to capacity system for metric was with water......

Last time I poured petrol down a drain (naughty boy), it floated, so its lighter than water. Or has my physics of densities gone down the pan (unlike the petrol )?

ajm

We've just been through this in another thread (aviation fuel). Petrol is much less dense than water, about 0.6 to 0.7 kg per litre.

farmer1

I believe it is very close to that at 20C

farmer1

However petrol is more denser then kerosene (aviation fuel)

John Catlin

At 60 degrees F + 737.22 kg/cu.m

Does that help ?

or

46.023 lbs per cub. ft.

ajm

The weight of fuel doesn't change with temperature. Its density changes until the vaporisation point when it becomes much less dense (obviously ).

The factors you should need to consider when selecting a pump are its maximum flow rate (at zero head), maximum pressure and the head there will be during operatin conditions. You can work out the pressure you will then get at a given head to work out whether you will need a pressure regulator.

ALi-B

iTrader: (1)

Cheers, 737.22 kg/cu.m = 0.73722kg/l - I got about 0.65 using my own very rounded figures, so seems about right

I can order my bits knowing they'll do the job now

Poor Guy

whats the flash point of petrol?

ajm

about -40 degrees C I think

Poor Guy

-40?!?!

okayyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy y.

ajm

hmmm.... By your response I think you are confusing flash point with autoignition temp. Flash point is defined as the temperature above which petrol can burn in the presence of air and its around the -40 degrees mark. The autoignition temp is about 250 degrees C.

PG

he's right you know

ajm

Of course I am! .... and modest too!

Leslie

In British measurements it will weigh very close to eight lbs avoirdupois at normal temperatures.

Les

Poor Guy

okely dokely.

tiggers

Alos depends on whether you are weighing standard petrol or Shell's extra light petrol developed for the Ferrari F1 team

Leslie

ALi-B

iTrader: (1)

Since when did people start taking corners in NSR???