Have one of these swirl pots but which connection goes where!!? Think the ones I have are correct but how does the fuel get back to the tank??


Swirl pot

Can someone confirm what goes where!

TIA,
Rich.


[Edited on 20/10/09 by shortie]

What you have there looks right. You don't have to worry about fuel getting back to the tank because you will never have more fuel coming back along the return line than you had going to the engine along the high pressure line.

Cheers,
Craig.

Only vaguely familliar with 4 pipe pots

12mm bottom to high pressure pump feeding injectors

on the top there ideally would be 3 pipes

One returns back to the tank - will be the highest and narrowest bore pipe

one is feeding the pot from a low pressure pump (keeping it topped up with fuel from the tank)

Lastly there should be one that is the fuel return from the injector rail

Just messing with paintshop pro as a picture will hopefully explain
Rescued attachment Image1.png

Looking at Rich's picture there appears to be a blanked off connection right on the top. This could possibly be used as a return to the main fuel tank (if a union was screwed in) or it could just be used to bleed the system initially and then sealed off. Ideally it would self bleed but not sure how much of an issue it would be if the lift pump did not have a return. My Rover V8 runs twin SU's and I use a self regulating fuel pump with no return pipe (not EFI in my case) to keep the carbs primed and it works fine.

Am I correct in assuming you are running en EFI system Rich? I think your reference to "high pressure" means that you are but worth checking.

Craig.

Edit: Ah yes I see the Zetec SE bit in your profile. Sorry...

[Edited on 20/10/2009 by craig1410]

Yes, for Zetec SE so EFI.

I thought the same about the blanked off connection on top, unscrew and use this for the return.

Haven't had a good look yet but looks an option.

Just wondered if anyone else has used this type?

Rich.

Another thing which is bothering me...do you have the two top connections the wrong way around in your diagram?

Normally (in my experience) low pressure connections have larger bores so for example the inlet to an EFI pump would be larger bore (say 14mm) compared to the outlet (say 8mm). The bottom of your swirl pot definitely goes to the EFI pump inlet which is a low pressure connection. What I'm thinking is that maybe the larger of the two top connections is supposed to be the inlet from the lift pump which might make more sense as the blanked off (possible tank return) connection is adjacent to it. That would leave the smaller bore top connection to be the return pipe from the fuel rail?

Maybe? Sorry I can't be more definitive.

Craig.

Good point Craig, think I've got it now!

This looks like it should be fine.


Fuel system

This might help...

http://www.autoimagination.co.uk/?page=manufacturers&id=55&product=973

The manufacturer of the swirl pot is FSE. I've not found their homepage but the above suggests the inlet is 10mm, outlet is 12mm and return is 6mm. That might suggest that you need two fuel tank return inlets - one from the swirl pot and one from the fuel rail. Not sure but you could email the manufacturer if in doubt.

Cheers,
Craig.

Sorry for the repeat posts but you can't seem to add an attachment when you edit your own posts...

See here:

http://www.fuelsystem.co.uk/filters.pdf

This gives the data sheet for the swirl pot. Small top connection is return to tank. Large top connection is feed from lift pump. Bottom connection is feed to injection pump.

[Edited on 20/10/2009 by craig1410]
Rescued attachment Swirl.jpg

Yup. The smaller one is the return (you can tell this cos there's a big arrow on top of the thing )

So is it right to use the top blanked off bit as I have shown and I am assuming this should work fine!?