rumplitter
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| posted on 29/1/08 at 09:32 AM |
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fuel supplies without a swirl pot?
I've seen some Z car fuel supplies without a swirl pot and just a high pressure pump, not the usual low pressure pump, swirl pot, high pressure
etc.....
Anyone else done the set up I've attached?
http://www.locostbuilders.co.uk/upload/MiniMojoProject.JPG
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SeaBass
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| posted on 29/1/08 at 09:54 AM |
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I have my fuel setup plumbed in a similar fashion to the that but with these differences...
I don't have a foam filled tank - just one of the rare none-leaking PTM tanks (for those that recall those). I don't have pre-pump filter
just a 15mm ID hose with the pump below the level of the base of the tank. I have a fairly large capacity injection filter prior to the fuel rail in
case the pump self destructs and to protect the injectors. I've also plumbed the return in almost directly above the send on the tank.
I had it on the road all last year and attended a couple of track evenings, where the car wasn't spared, with no symptoms of fuel starvation.
Cheers
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mookaloid
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| posted on 29/1/08 at 09:55 AM |
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That setup will work fine as long as there is enough fuel in the tank to stop fuel surging away from the tank outlet when
cornering/stopping/accelerating.
The point of the swirl pot is to keep a constant supply of fuel to the HP pump.
Maybe the Z cars have a built in swirl pot inside the tank?
Cheers
mark
"That thing you're thinking - it wont be that."
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RazMan
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| posted on 29/1/08 at 10:37 AM |
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Have a look at the in-tank Landrover pump / swirl / sender unit which I used - works a treat. 
[Edited on 29-1-08 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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Pants On Fire
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| posted on 29/1/08 at 11:52 AM |
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I have a non swirl pot set up which is fine until I reach under 1/2 tank of fuel then on left handers it stutters as it's starved of fuel, on
track days this in effect gives me lift off oversteer, not much fun really.
Currently planning to add swirl pot and low pressure pump in the rear end somewhere without losing my boot which I need for Ring trips and longer
blats with tent etc.
Yes, I am an agent of Satan, but my duties are largely ceremonial.
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rumplitter
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| posted on 29/1/08 at 12:21 PM |
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this is the fuel cell that i bought from rally design, 5 gallons might not get me too far though but it'll do for now!
someone has told me that the fuel return should be at the top of the tank, does it matter that the inlet and outlet are side by side?
 
Rescued attachment DRAG_RACE_VERTICAL.jpg
http://www.locostbuilders.co.uk/upload/MiniMojoProject.JPG
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Phil.J
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| posted on 29/1/08 at 12:22 PM |
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Your set-up will work fine as long as your tank provides a constant supply of fuel. I've never run a swirl pot and never had a problem, just run
a collector in the base of the tank or use a tall narrow tank.
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rumplitter
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| posted on 29/1/08 at 12:30 PM |
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where should i put the fuel filter? before the pump or after it or both?
http://www.locostbuilders.co.uk/upload/MiniMojoProject.JPG
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RazMan
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| posted on 29/1/08 at 01:06 PM |
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I would stick it in before the pump
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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rumplitter
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| posted on 29/1/08 at 01:40 PM |
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which High Pressure fuel pump?
which high pressure fuel pump should i use?
I'm running a 1.8 Honda Vtec
http://www.locostbuilders.co.uk/upload/MiniMojoProject.JPG
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RazMan
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| posted on 29/1/08 at 02:17 PM |
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The Walborough is always a keen favourite - do a search on eBay as they seem to pop up on there quite a lot.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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SeaBass
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| posted on 29/1/08 at 05:17 PM |
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quote:
Originally posted by rumplitter
where should i put the fuel filter? before the pump or after it or both?
The ideal situation is both, however, I've read the Bosch pump don't like sucking fuel at all and their lifespan is shortened...
The pump I'm using is from the scrappy of the underside of an EFI audi (not K-Jet). My injectors were considerably more expensive so
that's what I'm protecting. Each to their own I guess.
Cheers
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