Fuel Pumps And Swirl Pots
#1
Posted 24 March 2008 - 08:51 PM
The car is standard hayabusa injection at the moment but but will be turbo charged later on in life.
I only want to make one fuel system now, that will supply enough fuel for the later turbo engine.
Starting at the tank I first thought of the facet red top, mounted to the bottom of the tank.
up to 200bhp 6-7.5psi and 35g/hr flow.
Its quite big and awkward to fit in the place I had in mind.
So I looked at the one below, solid state one.
Up to 150 bhp 4-5.5psi and 18g/hr flow.
Intended swirl pot is 1.5 ltr
Diagram of swirl pot system (borrowed)
Now the last thing I want is fuel problems causing the engine to run lean on full boost.
So will the swirl pot always remain full with the small pump no matter how much fuel is demanded from the injection pump?
#2
Posted 24 March 2008 - 09:04 PM
Ok, now I've looked at the diagram properly i'll shut up
single pump sounds good though
Edited by Ethel, 24 March 2008 - 09:10 PM.
#3
Posted 24 March 2008 - 09:05 PM
cheers
#4
Posted 24 March 2008 - 09:34 PM
With the swirl pot idea I know for certain I have 1.5ltr fuel at hand (if it stays full). I have seen so many melted pistons from running high boost, caused by a moment of low fuel pressure. I don't want to take any chances.
A none turbo busa engine will probably just cut out or splutter after a fuel glitch with no damage.
Cheers for the ideas.
Edit Forgot to mention pump two is a high pressure injection pump.
Edited by koss, 24 March 2008 - 09:41 PM.
#5
Posted 24 March 2008 - 11:09 PM
Good luck with all the plumbing then as you have plenty of room to fit it all in!!!!
#6
Posted 06 April 2008 - 04:55 PM
make a sump in the bottom of the tank like im doing a do away with extra fuel pump and swirl pot and associated pipework, A 4"x4" square pickup area will suffice.
cheers
Just to clarify, would that be doing away with the low pressure fuel pump and run the whole fuel system at high pressure?
Thanks
#7
Posted 06 April 2008 - 04:58 PM
make a sump in the bottom of the tank like im doing a do away with extra fuel pump and swirl pot and associated pipework, A 4"x4" square pickup area will suffice.
cheers
Just to clarify, would that be doing away with the low pressure fuel pump and run the whole fuel system at high pressure?
Thanks
Yep, it makes sure under a long hard corner thet the high pressure pump doesnt get any air or los of fuel in their.
will post some pics soon of how i do mine.
cheers
#8
Posted 06 April 2008 - 05:03 PM
is it short and long/wide, or tall and deep?
the function of a swirl pot is to prevent fuel starvation in long sweeping corners when the tank is short and wide.
for example with a std mini tank you are unlikely to get fuel starvation unless the tank is pretty empty.
I'd say if you have a "sump" in the tank and its not masivly wide you'll be fin with no swirl pot and 1 pump.
#9
Posted 06 April 2008 - 05:36 PM
what shape is the tank?
is it short and long/wide, or tall and deep?
the function of a swirl pot is to prevent fuel starvation in long sweeping corners when the tank is short and wide.
for example with a std mini tank you are unlikely to get fuel starvation unless the tank is pretty empty.
I'd say if you have a "sump" in the tank and its not masivly wide you'll be fin with no swirl pot and 1 pump.
The tank is quite tall and about 18" high and 14" wide, the sump part should be about 4" deep and 4" wide/square, i have put a 1" taper to keep all the fuel in the sump aswell, i will also mount the filter and pump underneath to keep them out of the way of the cooling hoses plus they are as low as possible.
Hers a quick sketch so you get the idea.
cheers
Edited by markrally, 06 April 2008 - 05:39 PM.
#10
Posted 06 April 2008 - 06:05 PM
#11
Posted 06 April 2008 - 06:19 PM
in that case i'd just use 1 pump.
Yes correct.
cheers
#12
Posted 06 April 2008 - 06:27 PM
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