So whats the go with a surge tank, and why does mine work without one?
It was never mentioned when I looked for advice.

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'72 English Van...'72 Export Moke ...63' 850...KZ 750E1...'74 P76

A bit of a pic of my setup is in here:
http://www.ausmini.com/forums/viewtopic ... &start=165

I have a facet pump feeding the surge tank from the main tank.
Then the high pressure efi pump feeds the fuel rail.
I have a filter before the surge tank pump and after the hig pressure efi pump also.

I was running the car without the surge tank and , which was OK, but I made sure I always had at least 1/2 tank of fuel.
The surge tank just makes sure the feed for the efi fuel pump is constant, independant of if the fuel in the main tank is sloshing around from side to side.

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-James.

Toyota 4EFTE Powered Minivan.
102 Kw @ The Front Wheels....Oh What a Feeling!

That was what confused me but the pot stops the car from sucking air and doing damage to the engine.

Would be easy for you to add one in

So, sounds as if I'm just lucky that I'm surrounded by dead straight roads out here
Never had a problem. I've driven in Melb, Adl, Syd and Brissy as well as fast, tight mountian roads. It gets a flogging too.
But if I'd done my research properly I would have fitted one straight up from the start though I suppose.

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'72 English Van...'72 Export Moke ...63' 850...KZ 750E1...'74 P76

Might sound like a stupid question but why do I need a return line from the swirl tank?

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1970 Mini Deluxe - 1275, Weber, Clive 346 cam, MS 4-pot slotted discs, Megajolt ignition Now with new improved Mambas... almost on the road
1966 Van with Traveller rear seat conversion
2008 Prado GXL
All in various states of repair...

If your low pressure pump has enough flow to supply the injectors (injector) at high load, then when you are sitting idling and the engine is not using as much fuel it will over fill the surge tank.
The return line takes the overflow from the surge tank into the main tank.

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-James.

Toyota 4EFTE Powered Minivan.
102 Kw @ The Front Wheels....Oh What a Feeling!

The stock Mini tank it probably fairly resistant to surging and sucking air due to its shape.
It is not like a big flat tank that mounts under a boot floor like some other cars that can suck air in corners quite easily.

Imagine holding the tank in your hands with about 4 litres of fuel in it and think of how far you would have to tilt the tank in each direction to expose the pick-up.

I am not saying it does not need a surge tank, I am just saying why it would work without one without any signs of sucking air.

A normal mini saloon tank wouldn't really need a surge tank as you say, but a van tank (which the original question was about) is totally the opposite shape. Very long and low. I would definitely recommend one.
With around 1/4 tank I can hear the low pressure surge tank feed pump suck air going around normal intersection corners if I give it a bit of berries.
Definitely wouldn't want the high pressure pump sucking air like that!

_________________
-James.

Toyota 4EFTE Powered Minivan.
102 Kw @ The Front Wheels....Oh What a Feeling!

Yes I forgot the question was about Van tanks.

Right. I'm going to put this to the test.
It's not to disprove the need for a surge tank. Just to see how far I can push my van before it starves of fuel.
Here's one way I'll find out.
1. Drain tank
2. Fill with 1ltr of ULP.
3. Drive to nearest around-about, or open field if Mr Plod is reading this.
4. Go round and round and round and round.......at a reasonable pace.
5. Result.

I'll let you know how I go.
Gimme until couple of days.

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'72 English Van...'72 Export Moke ...63' 850...KZ 750E1...'74 P76

lol good work blue lol..